From grant at ecoharmony.com  Fri Jul  3 09:21:09 2009
From: grant at ecoharmony.com (Grant Ballard-Tremeer)
Date: Fri, 3 Jul 2009 07:21:09 -0700
Subject: [Digestion] **STOP PRESS** Re: BEIA: Call for Proposals for Pilot
	Projects
Message-ID: <007101c9fbe9$836759b0$8a360d10$@com>

Forwarded from HEDON News

Biomass Energy Initiative for Africa (BEIA)

==Call for Proposals for Pilot Projects==

The  World  Bank is requesting proposals for innovative pilot projects
that  demonstrate  new  approaches  to  modernizing  biomass energy in
Sub-Saharan  Africa.   This  request  for  proposals  is part of a new
initiative  called  the  Biomass  Energy  Initiative for Africa (BEIA)
which is administered by the World Bank Africa Energy Unit (AFTEG) and
financed  by  the  Energy Sector Management Assistance Program (ESMAP)
Africa  Renewable  Energy  Access  (AFREA) Trust Fund, provided by the
Government of the Netherlands. 

Deadline 5 August 2009

More  information,  and descriptions in English, Portuguese and French
are available here: http://www.hedon.info/1467/news.htm



--
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to the HEDON web page resources. This is a simple process and can go a 
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You are receiving this email because you signed up to the HEDON Household 
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Please direct any queries to Grant Ballard-Tremeer <grant at ecoharmony.com>




From kawade at gmail.com  Sun Jul 12 08:42:21 2009
From: kawade at gmail.com (yadnavir kawade)
Date: Sun, 12 Jul 2009 06:42:21 -0700 (PDT)
Subject: [Digestion] Invitation to connect on LinkedIn
Message-ID: <624291740.1035601.1247406141635.JavaMail.app@ech3-cdn06.prod>

LinkedIn
------------

yadnavir kawade requested to add you as a connection on LinkedIn:
------------------------------------------

Alejandro,

I'd like to add you to my professional network on LinkedIn.

- yadnavir

View invitation from yadnavir kawade
http://www.linkedin.com/e/XykWx5tX_HAvAC9vUMzAIy6q_6LHO698UyuZZSNEw6/blk/235158326_3/cRYSczcUdj4RcP8LqnpPbOYWrSlI/svi/ 
------------------------------------------

DID YOU KNOW you can conduct a more credible and powerful reference check using LinkedIn? Enter the company name and years of employment or the prospective employee to find their colleagues that are also in your network. This provides you with a more balanced set of feedback to evaluate that new hire.
http://www.linkedin.com/e/rsr/inv-27/

 
------
(c) 2009, LinkedIn Corporation


From yaaser67 at yahoo.co.uk  Mon Jul 13 06:02:08 2009
From: yaaser67 at yahoo.co.uk (Shaaban Kassuwi)
Date: Mon, 13 Jul 2009 11:02:08 +0000 (GMT)
Subject: [Digestion] Digestion Digest, Vol 37, Issue 2
In-Reply-To: <mailman.5.1247418002.9785.digestion_listserv.repp.org@listserv.repp.org>
References: <mailman.5.1247418002.9785.digestion_listserv.repp.org@listserv.repp.org>
Message-ID: <299894.80363.qm@web25001.mail.ukl.yahoo.com>

It is Ok,
Kassuwi




________________________________
From: "digestion-request at listserv.repp.org" <digestion-request at listserv.repp.org>
To: digestion at listserv.repp.org
Sent: Sunday, 12 July, 2009 20:00:02
Subject: Digestion Digest, Vol 37, Issue 2

Send Digestion mailing list submissions to
??? digestion at listserv.repp.org

To subscribe or unsubscribe via the World Wide Web, visit
??? http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
or, via email, send a message with subject or body 'help' to
??? digestion-request at listserv.repp.org

You can reach the person managing the list at
??? digestion-owner at listserv.repp.org

When replying, please edit your Subject line so it is more specific
than "Re: Contents of Digestion digest..."


Today's Topics:

? 1. Invitation to connect on LinkedIn (yadnavir kawade)


----------------------------------------------------------------------

Message: 1
Date: Sun, 12 Jul 2009 06:42:21 -0700 (PDT)
From: yadnavir kawade <kawade at gmail.com>
Subject: [Digestion] Invitation to connect on LinkedIn
To: Alejandro Bustamante <digestion at listserv.repp.org>
Message-ID:
??? <624291740.1035601.1247406141635..JavaMail.app at ech3-cdn06.prod>
Content-Type: text/plain; charset=UTF-8

LinkedIn
------------

yadnavir kawade requested to add you as a connection on LinkedIn:
------------------------------------------

Alejandro,

I'd like to add you to my professional network on LinkedIn.

- yadnavir

View invitation from yadnavir kawade
http://www.linkedin.com/e/XykWx5tX_HAvAC9vUMzAIy6q_6LHO698UyuZZSNEw6/blk/235158326_3/cRYSczcUdj4RcP8LqnpPbOYWrSlI/svi/ 
------------------------------------------

DID YOU KNOW you can conduct a more credible and powerful reference check using LinkedIn? Enter the company name and years of employment or the prospective employee to find their colleagues that are also in your network. This provides you with a more balanced set of feedback to evaluate that new hire.
http://www.linkedin.com/e/rsr/inv-27/


------
(c) 2009, LinkedIn Corporation



------------------------------

_______________________________________________
Digestion mailing list
Digestion at listserv.repp.org
http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org

End of Digestion Digest, Vol 37, Issue 2
****************************************



      

From a.avalos at avaloninmobiliaria.com.mx  Thu Jul 16 13:31:48 2009
From: a.avalos at avaloninmobiliaria.com.mx (=?iso-8859-1?Q?Arturo_=C1valos-Longoria?=)
Date: Thu, 16 Jul 2009 13:31:48 -0500
Subject: [Digestion] Filter
Message-ID: <009301ca0643$b1988a20$14c99e60$@avalos@avaloninmobiliaria.com.mx>

Hello all

 

A question from Mexico. Could someone help with information about a good
(and cheap) H2S filter?

Thanks for your help.

 

Arturo ?valos

 

 


From brunoM1 at telenet.be  Thu Jul 16 14:22:46 2009
From: brunoM1 at telenet.be (Bruno M.)
Date: Thu, 16 Jul 2009 21:22:46 +0200
Subject: [Digestion] Filter
In-Reply-To: <009301ca0643$b1988a20$14c99e60$@avalos@avaloninmobiliaria.
	com.mx>
References: <009301ca0643$b1988a20$14c99e60$@avalos@avaloninmobiliaria.com.mx>
Message-ID: <mailman.32.1247772164.15433.digestion_listserv.repp.org@listserv.repp.org>

Real cheap is a vessel filled with rusty (shreded) tincans. ( you want the rust)

Guide the wet biogas trough it and the H2S reacts to FeS. ( iron sulphide)
with 2 vessels you can use one and regenerate the other.
Regenerating is done by slowely (!) allow air in the saturated vessel( taken out of the cicuit)
then oxygen of the air oxidize the FeS to ferro-oxide, Sulfur and heat.

There are other possibilities, like bioscrubbers, or chemical scrubbers.
It may depend on how clean does the gas need to be?

grts
Bruno M.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~
At 20:31 16/07/2009, you wrote:
>Hello all
> 
>A question from Mexico. Could someone help with information about a good
>(and cheap) H2S filter?
>
>Thanks for your help.
>
>
>Arturo ?valos
>==============================================================
> 



From bingham at zekes.com  Thu Jul 16 15:23:19 2009
From: bingham at zekes.com (bingham)
Date: Thu, 16 Jul 2009 13:23:19 -0700
Subject: [Digestion] Filter
Message-ID: <5E2433290B164B498B39CD9810C33856@Portable>

We have found that the turnings from machine shops work best.
Clean off the cutting oil with soap and let them sit out, they are
ready to use. Do not get the stainless or aluminum.
Brent
----- Original Message ----- 
From: "Bruno M." <brunoM1 at telenet.be>
To: <digestion at listserv.repp.org>
Sent: Thursday, July 16, 2009 12:22 PM
Subject: Re: [Digestion] Filter


Real cheap is a vessel filled with rusty (shreded) tincans. ( you want the 
rust)

Guide the wet biogas trough it and the H2S reacts to FeS. ( iron sulphide)
with 2 vessels you can use one and regenerate the other.
Regenerating is done by slowely (!) allow air in the saturated vessel( taken 
out of the cicuit)
then oxygen of the air oxidize the FeS to ferro-oxide, Sulfur and heat.

There are other possibilities, like bioscrubbers, or chemical scrubbers.
It may depend on how clean does the gas need to be?

grts
Bruno M.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~
At 20:31 16/07/2009, you wrote:
>Hello all
>
>A question from Mexico. Could someone help with information about a good
>(and cheap) H2S filter?
>
>Thanks for your help.
>
>
>Arturo ?valos
>==============================================================
>


_______________________________________________
Digestion mailing list
Digestion at listserv.repp.org
http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
Beginner's Guide to Biogas
http://www.adelaide.edu.au/biogas/
http://info.bioenergylists.org



From david at h4c.org  Thu Jul 16 18:28:24 2009
From: david at h4c.org (David)
Date: Thu, 16 Jul 2009 16:28:24 -0700
Subject: [Digestion] Filter
In-Reply-To: <009301ca0643$b1988a20$14c99e60$@avalos@avaloninmobiliaria.com.mx>
References: <009301ca0643$b1988a20$14c99e60$@avalos@avaloninmobiliaria.com.mx>
Message-ID: <4A5FB798.3080907@h4c.org>


Arturo,


Arturo ?valos-Longoria wrote:
> Hello all
>
> A question from Mexico. Could someone help with information about a good (and cheap) H2S filter?
>   

There is a good deal of information on the web about that subject, 
although most of it is not easily applied to low-tech situations.

The first thing one must attempt to discover, however, is whether there 
is "too much" H2S in the biogas. At any ordinary concentration, the main 
problem with H2S is that might cause damage to any engine which is being 
powered by the biogas. The US Bureau of Standards declared in 1933 that 
there likely would be no problem with running engines on biogas if the 
concentration was at or below 0.1%. (H2S does not need to be removed to 
use the biogas for cooking or lighting.)

McBride and Edwards developed a method which can be used in such 
situations to determine the concentration of H2S in biogas. The method 
is described here 
<http://completebiogas.com/PDFs/BiogasHandbook_A01_analysis.pdf>.

The best way to remove H2S, however, is to prevent it from being 
produced in the first place. This can sometimes be done by taking care 
about the substrates that are being used to generate the biogas, and the 
water used to mix with those substrates. H2S increases when some 
proteins are decomposed. H2S increases most dramatically when the pH 
shifts towards the acidic. (Keeping pH at or above 7.6 will prevent any 
more than 6% of the sulfur in the slurry from being expressed as H2S. 
For each 0.2 pH unit rise thereafter, the H2S concentration will fall by 
about 50%.)


All that said, you may have it, you may need to remove it, and if 
whatever control over the process you can assert has not reduced its 
concentration below the target, then you will need to scrub.

As some have already said, the easiest low-tech way-- but by no means 
the only low-tech way-- to scrub biogas is to use iron filings. William 
Dunkley (1921) recommended using ferrus sulfate, lime, rust and sawdust 
(25, 5, and 1 pounds respectively, mixed with 1 bushel of sawdust). 
After use, if that mix is exposed to air, that will to some degree 
regenerate it, but the oxidative reactions which occur generate heat, so 
take great care to introduce the air into any used mixture slowly.

H2S will dissolve in plain water, to a temperature-dependent degree. 
Adding a little chlorine (a 1:2.5 molal ratio, as compared with the 
amount of H2S which will be reacting) to the water can increase the 
efficiency.

Any scrubbing equipment should obviously be gas-tight, and where one has 
a substance such as Dunkley's sawdust or even a liquid solution to 
periodically replace, it is crucially important after replacement to 
insure that the setup is flushed with biogas to drive out the air. *Do* 
*not* *save* any biogas scrubbed soon after the equipment is put back in 
service, *unless* the equipment has been carefully purged of air, since 
it may contain an explosive mixture of the ambient oxygen and the 
scrubbed biogas.


The best publication that I have seen on the web which discusses 
scrubbing biogas is called "The Purification of Biogas", published by 
the German organization GTZ. It is found in several formats on the web, 
but I think the best version is found here 
<http://www.fastonline.org/CD3WD_40/JF/JF_OTHER/SMALL/GTZ-Purification%20of%20Biogas%201985%20B.pdf>.




d.
-- 
David William House
"The Complete Biogas Handbook" |www.completebiogas.com|
/Vahid Biogas/, an alternative energy consultancy |www.vahidbiogas.com

|
"Make no search for water.       But find thirst,
And water from the very ground will burst."
(Rumi, a Persian mystic poet, quoted in /Delight of Hearts/, p. 77)

http://bahai.us/

From david at h4c.org  Thu Jul 16 20:44:53 2009
From: david at h4c.org (David)
Date: Thu, 16 Jul 2009 18:44:53 -0700
Subject: [Digestion] Filter
In-Reply-To: <4A5FB798.3080907@h4c.org>
References: <009301ca0643$b1988a20$14c99e60$@avalos@avaloninmobiliaria.com.mx>
	<4A5FB798.3080907@h4c.org>
Message-ID: <4A5FD795.2020000@h4c.org>


Replying to my own post:

David wrote:
> (H2S does not need to be removed to use the biogas for cooking or 
> lighting.)

In re-reading the statement, I think it is drawn too broadly. When H2S 
burns with adequate oxygen, it produces sulfur dioxide, which can follow 
a path to becoming either sulfurous or sulfuric acid. (That's what 
corrodes the engine and breaks down the oil in the crankcase.)

Clearly, there can be enough H2S in biogas that these corrosive 
molecules are produced in great enough abundance to be problematic 
either to breathe, or troublesome in their ultimate impact on exhaust 
systems. Just how much H2S to fear would have to be evaluated in each 
circumstance, but my impression is that it is likely above the amount 
that would cause problems in engines. (Anyone have better information?) 
On the other hand, I think the standard should be "What if it were my 
child who is breathing the air?" Using the method linked in my last 
post, one should be able to determine the approximate level of H2S, and 
on that basis and-- if it appears safe enough-- a subsequent "sniff 
test" of the burned gases would offer a rough guide to whether to scrub 
or not.





d.
-- 
David William House
"The Complete Biogas Handbook" |www.completebiogas.com|
/Vahid Biogas/, an alternative energy consultancy |www.vahidbiogas.com

|
"Make no search for water.       But find thirst,
And water from the very ground will burst."
(Rumi, a Persian mystic poet, quoted in /Delight of Hearts/, p. 77)

http://bahai.us/

From bingham at zekes.com  Thu Jul 16 21:21:41 2009
From: bingham at zekes.com (bingham)
Date: Thu, 16 Jul 2009 19:21:41 -0700
Subject: [Digestion] Filter
References: <009301ca0643$b1988a20$14c99e60$@avalos@avaloninmobiliaria.com.mx><4A5FB798.3080907@h4c.org>
	<4A5FD795.2020000@h4c.org>
Message-ID: <632567D3DF7041FEA76F3FCCB0F53741@Portable>

Bottom line any H2S is a problem. A system we set up in Mexico used the gas 
to light and heat
small buildings. The lamps coroded after only a few hundred hours. the H2S 
was barly detectable.
Filters are a cheap easy way to protect every thing down streem. There is 
almost no way to controle
most digesteters to a point no H2S is produced.
Brent
----- Original Message ----- 
From: "David" <david at h4c.org>
To: "For discussion of Anaerobic Digestion" <digestion at listserv.repp.org>
Sent: Thursday, July 16, 2009 6:44 PM
Subject: Re: [Digestion] Filter


>
> Replying to my own post:
>
> David wrote:
>> (H2S does not need to be removed to use the biogas for cooking or 
>> lighting.)
>
> In re-reading the statement, I think it is drawn too broadly. When H2S 
> burns with adequate oxygen, it produces sulfur dioxide, which can follow a 
> path to becoming either sulfurous or sulfuric acid. (That's what corrodes 
> the engine and breaks down the oil in the crankcase.)
>
> Clearly, there can be enough H2S in biogas that these corrosive molecules 
> are produced in great enough abundance to be problematic either to 
> breathe, or troublesome in their ultimate impact on exhaust systems. Just 
> how much H2S to fear would have to be evaluated in each circumstance, but 
> my impression is that it is likely above the amount that would cause 
> problems in engines. (Anyone have better information?) On the other hand, 
> I think the standard should be "What if it were my child who is breathing 
> the air?" Using the method linked in my last post, one should be able to 
> determine the approximate level of H2S, and on that basis and-- if it 
> appears safe enough-- a subsequent "sniff test" of the burned gases would 
> offer a rough guide to whether to scrub or not.
>
>
>
>
>
> d.
> -- 
> David William House
> "The Complete Biogas Handbook" |www.completebiogas.com|
> /Vahid Biogas/, an alternative energy consultancy |www.vahidbiogas.com
>
> |
> "Make no search for water.       But find thirst,
> And water from the very ground will burst."
> (Rumi, a Persian mystic poet, quoted in /Delight of Hearts/, p. 77)
>
> http://bahai.us/
> _______________________________________________
> Digestion mailing list
> Digestion at listserv.repp.org
> http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
> Beginner's Guide to Biogas
> http://www.adelaide.edu.au/biogas/
> http://info.bioenergylists.org
> 


From tallerbiogas at hotmail.com  Fri Jul 17 07:01:17 2009
From: tallerbiogas at hotmail.com (Jaime Marti Herrero)
Date: Fri, 17 Jul 2009 08:01:17 -0400
Subject: [Digestion] Filter
In-Reply-To: <632567D3DF7041FEA76F3FCCB0F53741@Portable>
References: <009301ca0643$b1988a20$14c99e60$@avalos@avaloninmobiliaria.com.mx><4A5FB798.3080907@h4c.org>
	<4A5FD795.2020000@h4c.org> <632567D3DF7041FEA76F3FCCB0F53741@Portable>
Message-ID: <SNT115-W486C2A430C032AF793C55ADC1E0@phx.gbl>


About  HS2 and cooking and lighting...
In Bolivia we found that on household biodigesters, the burner keep in good conditions for the first year, after that, must be change. But the main problem came from the families experience: they say that the food taste different when is cooked instead wood, and they say that there are no smoke (compared with wood cooking, of course) but there are an strange smell at the kitchen when they cook with biogas... These can be poroduced because not all the biogas is burned due the nurner is not propertly adaoted to biogas, but also due cultural aspects (they are accustomed  to wood cooking).

When we have tried to introduce small filters with iron wool, that can be found in any local market and cost 0.10 ?, we found they use it ones, the first time we install the filter, but no more...

We are still looking how to solve this issue.

any idea is wellcome
keep on going
jaime

-----
Jaime Mart? Herrero

BIOGAS AND BOLVIA
-Video: Biodigester installation in bolivian altiplane 
http://es.youtube.com/watch?v=3Sl0XEN5Bgo
-Manual gratuito-Biodigestores familiares: Gu?a de dise?o y manual de instalaci?n
http://www.upc.edu/grecdh/pdf/2008_JMH_Guia_biodigestores.pdf





> From: bingham at zekes.com
> To: david at h4c.org; digestion at listserv.repp.org
> Date: Thu, 16 Jul 2009 19:21:41 -0700
> Subject: Re: [Digestion] Filter
> 
> Bottom line any H2S is a problem. A system we set up in Mexico used the gas 
> to light and heat
> small buildings. The lamps coroded after only a few hundred hours. the H2S 
> was barly detectable.
> Filters are a cheap easy way to protect every thing down streem. There is 
> almost no way to controle
> most digesteters to a point no H2S is produced.
> Brent
> ----- Original Message ----- 
> From: "David" <david at h4c.org>
> To: "For discussion of Anaerobic Digestion" <digestion at listserv.repp.org>
> Sent: Thursday, July 16, 2009 6:44 PM
> Subject: Re: [Digestion] Filter
> 
> 
> >
> > Replying to my own post:
> >
> > David wrote:
> >> (H2S does not need to be removed to use the biogas for cooking or 
> >> lighting.)
> >
> > In re-reading the statement, I think it is drawn too broadly. When H2S 
> > burns with adequate oxygen, it produces sulfur dioxide, which can follow a 
> > path to becoming either sulfurous or sulfuric acid. (That's what corrodes 
> > the engine and breaks down the oil in the crankcase.)
> >
> > Clearly, there can be enough H2S in biogas that these corrosive molecules 
> > are produced in great enough abundance to be problematic either to 
> > breathe, or troublesome in their ultimate impact on exhaust systems. Just 
> > how much H2S to fear would have to be evaluated in each circumstance, but 
> > my impression is that it is likely above the amount that would cause 
> > problems in engines. (Anyone have better information?) On the other hand, 
> > I think the standard should be "What if it were my child who is breathing 
> > the air?" Using the method linked in my last post, one should be able to 
> > determine the approximate level of H2S, and on that basis and-- if it 
> > appears safe enough-- a subsequent "sniff test" of the burned gases would 
> > offer a rough guide to whether to scrub or not.
> >
> >
> >
> >
> >
> > d.
> > -- 
> > David William House
> > "The Complete Biogas Handbook" |www.completebiogas.com|
> > /Vahid Biogas/, an alternative energy consultancy |www.vahidbiogas.com
> >
> > |
> > "Make no search for water.       But find thirst,
> > And water from the very ground will burst."
> > (Rumi, a Persian mystic poet, quoted in /Delight of Hearts/, p. 77)
> >
> > http://bahai.us/
> > _______________________________________________
> > Digestion mailing list
> > Digestion at listserv.repp.org
> > http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
> > Beginner's Guide to Biogas
> > http://www.adelaide.edu.au/biogas/
> > http://info.bioenergylists.org
> > 
> 
> _______________________________________________
> Digestion mailing list
> Digestion at listserv.repp.org
> http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
> Beginner's Guide to Biogas
> http://www.adelaide.edu.au/biogas/
> http://info.bioenergylists.org

_________________________________________________________________
News, entertainment and everything you care about at Live.com. Get it now!
http://www.live.com/getstarted.aspx

From tabeles at hotmail.com  Fri Jul 17 11:31:53 2009
From: tabeles at hotmail.com (tom abeles)
Date: Fri, 17 Jul 2009 11:31:53 -0500
Subject: [Digestion] Filter
In-Reply-To: <SNT115-W486C2A430C032AF793C55ADC1E0@phx.gbl>
References: <009301ca0643$b1988a20$14c99e60$@avalos@avaloninmobiliaria.com.mx><4A5FB798.3080907@h4c.org>
	<4A5FD795.2020000@h4c.org> <632567D3DF7041FEA76F3FCCB0F53741@Portable> 
	<SNT115-W486C2A430C032AF793C55ADC1E0@phx.gbl>
Message-ID: <BAY108-W17BE6814CBFDB9C1D2E7AAA71E0@phx.gbl>


Hi Jamie

In the United States when we cook on a gas grill we often place wood chips on the burner to add a smoky flavor to the grilled food. I am not convinced that it adds as much to the cooked food as it does to the atmosphere for those doing the cooking, but it sells. So you might try a variance on this with the biogas. Incidentally, the char and the smoke might capture some of the sulfur and other noxious compounds that are in the biogas giving it a distinctive odor.

thoughts?

tom

tom abeles

> From: tallerbiogas at hotmail.com
> To: digestion at listserv.repp.org; david at h4c.org
> Date: Fri, 17 Jul 2009 08:01:17 -0400
> Subject: Re: [Digestion] Filter
> 
> 
> About  HS2 and cooking and lighting...
> In Bolivia we found that on household biodigesters, the burner keep in good conditions for the first year, after that, must be change. But the main problem came from the families experience: they say that the food taste different when is cooked instead wood, and they say that there are no smoke (compared with wood cooking, of course) but there are an strange smell at the kitchen when they cook with biogas... These can be poroduced because not all the biogas is burned due the nurner is not propertly adaoted to biogas, but also due cultural aspects (they are accustomed  to wood cooking).
> 
> When we have tried to introduce small filters with iron wool, that can be found in any local market and cost 0.10 ?, we found they use it ones, the first time we install the filter, but no more...
> 
> We are still looking how to solve this issue.
> 
> any idea is wellcome
> keep on going
> jaime
> 
> -----
> Jaime Mart? Herrero
> 
> BIOGAS AND BOLVIA
> -Video: Biodigester installation in bolivian altiplane 
> http://es.youtube.com/watch?v=3Sl0XEN5Bgo
> -Manual gratuito-Biodigestores familiares: Gu?a de dise?o y manual de instalaci?n
> http://www.upc.edu/grecdh/pdf/2008_JMH_Guia_biodigestores.pdf
> 
> 
> 
> 
> 
> > From: bingham at zekes.com
> > To: david at h4c.org; digestion at listserv.repp.org
> > Date: Thu, 16 Jul 2009 19:21:41 -0700
> > Subject: Re: [Digestion] Filter
> > 
> > Bottom line any H2S is a problem. A system we set up in Mexico used the gas 
> > to light and heat
> > small buildings. The lamps coroded after only a few hundred hours. the H2S 
> > was barly detectable.
> > Filters are a cheap easy way to protect every thing down streem. There is 
> > almost no way to controle
> > most digesteters to a point no H2S is produced.
> > Brent
> > ----- Original Message ----- 
> > From: "David" <david at h4c.org>
> > To: "For discussion of Anaerobic Digestion" <digestion at listserv.repp.org>
> > Sent: Thursday, July 16, 2009 6:44 PM
> > Subject: Re: [Digestion] Filter
> > 
> > 
> > >
> > > Replying to my own post:
> > >
> > > David wrote:
> > >> (H2S does not need to be removed to use the biogas for cooking or 
> > >> lighting.)
> > >
> > > In re-reading the statement, I think it is drawn too broadly. When H2S 
> > > burns with adequate oxygen, it produces sulfur dioxide, which can follow a 
> > > path to becoming either sulfurous or sulfuric acid. (That's what corrodes 
> > > the engine and breaks down the oil in the crankcase.)
> > >
> > > Clearly, there can be enough H2S in biogas that these corrosive molecules 
> > > are produced in great enough abundance to be problematic either to 
> > > breathe, or troublesome in their ultimate impact on exhaust systems. Just 
> > > how much H2S to fear would have to be evaluated in each circumstance, but 
> > > my impression is that it is likely above the amount that would cause 
> > > problems in engines. (Anyone have better information?) On the other hand, 
> > > I think the standard should be "What if it were my child who is breathing 
> > > the air?" Using the method linked in my last post, one should be able to 
> > > determine the approximate level of H2S, and on that basis and-- if it 
> > > appears safe enough-- a subsequent "sniff test" of the burned gases would 
> > > offer a rough guide to whether to scrub or not.
> > >
> > >
> > >
> > >
> > >
> > > d.
> > > -- 
> > > David William House
> > > "The Complete Biogas Handbook" |www.completebiogas.com|
> > > /Vahid Biogas/, an alternative energy consultancy |www.vahidbiogas.com
> > >
> > > |
> > > "Make no search for water.       But find thirst,
> > > And water from the very ground will burst."
> > > (Rumi, a Persian mystic poet, quoted in /Delight of Hearts/, p. 77)
> > >
> > > http://bahai.us/
> > > _______________________________________________
> > > Digestion mailing list
> > > Digestion at listserv.repp.org
> > > http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
> > > Beginner's Guide to Biogas
> > > http://www.adelaide.edu.au/biogas/
> > > http://info.bioenergylists.org
> > > 
> > 
> > _______________________________________________
> > Digestion mailing list
> > Digestion at listserv.repp.org
> > http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
> > Beginner's Guide to Biogas
> > http://www.adelaide.edu.au/biogas/
> > http://info.bioenergylists.org
> 
> _________________________________________________________________
> News, entertainment and everything you care about at Live.com. Get it now!
> http://www.live.com/getstarted.aspx
> _______________________________________________
> Digestion mailing list
> Digestion at listserv.repp.org
> http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
> Beginner's Guide to Biogas
> http://www.adelaide.edu.au/biogas/
> http://info.bioenergylists.org

_________________________________________________________________
Lauren found her dream laptop. Find the PC that?s right for you.
http://www.microsoft.com/windows/choosepc/?ocid=ftp_val_wl_290

From renertech at xtra.co.nz  Sat Jul 18 01:42:10 2009
From: renertech at xtra.co.nz (Ken Calvert)
Date: Sat, 18 Jul 2009 18:42:10 +1200
Subject: [Digestion] Filter
References: <5E2433290B164B498B39CD9810C33856@Portable>
Message-ID: <FABB6E04EFD6438789F2AE3E0659CA1A@MARTHA>

Heh don't even bother to shred the tin cans, just bash them together into as 
small a volume as possible to get maximum surface area per unit volume. Much 
more than you can get with metal turnings.  Yes, either rust or iron metal 
will react with damp H2S, but the point of using rusty cans is that the 
varnish coating that goes on cans in lieu of metalic tin to stop fruit acids 
corroding the metal has to be mostly removed before they will work.  The 
ferrous sulphide will oxide to form grey metalic iron and elemental 'flowers 
of sulphur'   which will ultimately choke the barrell, but you will be 
replacing the barrel long before that.  If you use a  plastic barrel to stop 
it also corroding be very careful  at how you let the air into it because a 
lot of heat is evolved in the reaction to regerate the metalic iron. 
A.T.B. Ken C.
----- Original Message ----- 
From: "bingham" <bingham at zekes.com>
To: "For discussion of Anaerobic Digestion" <digestion at listserv.repp.org>
Sent: Friday, July 17, 2009 8:23 AM
Subject: Re: [Digestion] Filter


We have found that the turnings from machine shops work best.
Clean off the cutting oil with soap and let them sit out, they are
ready to use. Do not get the stainless or aluminum.
Brent
----- Original Message ----- 
From: "Bruno M." <brunoM1 at telenet.be>
To: <digestion at listserv.repp.org>
Sent: Thursday, July 16, 2009 12:22 PM
Subject: Re: [Digestion] Filter


Real cheap is a vessel filled with rusty (shreded) tincans. ( you want the
rust)

Guide the wet biogas trough it and the H2S reacts to FeS. ( iron sulphide)
with 2 vessels you can use one and regenerate the other.
Regenerating is done by slowely (!) allow air in the saturated vessel( taken
out of the cicuit)
then oxygen of the air oxidize the FeS to ferro-oxide, Sulfur and heat.

There are other possibilities, like bioscrubbers, or chemical scrubbers.
It may depend on how clean does the gas need to be?

grts
Bruno M.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~
At 20:31 16/07/2009, you wrote:
>Hello all
>
>A question from Mexico. Could someone help with information about a good
>(and cheap) H2S filter?
>
>Thanks for your help.
>
>
>Arturo ?valos
>==============================================================
>


_______________________________________________
Digestion mailing list
Digestion at listserv.repp.org
http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
Beginner's Guide to Biogas
http://www.adelaide.edu.au/biogas/
http://info.bioenergylists.org


_______________________________________________
Digestion mailing list
Digestion at listserv.repp.org
http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
Beginner's Guide to Biogas
http://www.adelaide.edu.au/biogas/
http://info.bioenergylists.org 



From renertech at xtra.co.nz  Sat Jul 18 02:57:14 2009
From: renertech at xtra.co.nz (Ken Calvert)
Date: Sat, 18 Jul 2009 19:57:14 +1200
Subject: [Digestion] Filter Don't use potscrubs! They are too fine.
References: <009301ca0643$b1988a20$14c99e60$@avalos@avaloninmobiliaria.com.mx><4A5FB798.3080907@h4c.org><4A5FD795.2020000@h4c.org>
	<632567D3DF7041FEA76F3FCCB0F53741@Portable>
	<SNT115-W486C2A430C032AF793C55ADC1E0@phx.gbl>
Message-ID: <075C45759C09423AA6845D3A3A5CE900@MARTHA>

Here we go again!  Very finely divided iron 'wool' like as in pot 
mitts/scrubs falls apart and becomes a thin layer of powder in the bottom of 
the filter.  Whereas bashed up steel cans and Lathe turnings still stay in 
shape  and hold their structure and surface area for much longer.   Besides, 
its about the dearest way to get suitable iron metal to build an adequate 
biogas filter.  I favour an old 200 litre oil or gasoline drum, modified to 
give two 50mm holes in the top.  The cans should be bashed to the point that 
they can be pushed down through one 50mm bung hole, and the other with a 
piece of  50mm pipe that goes down to nearly the base of the drum.  The 
metal of the drum being of heavier guage than the steel cans, the drum will 
not collapse before the filter itself becomes choked with sulfur and the 
metal cans collapse into the bottom of the drum.
     Despite being called rotten egg gas and having a foul smell, you can 
actually taste H2S on the tongue at something like 50,000 parts to 1. Thats 
long before it becomes strong enough to smell.  So, those folks that 
complain about the taste are quite correct.  The only good level of H2S in 
biogas is 0. Zilch!.    Ken C.

----- Original Message ----- 
From: "Jaime Marti Herrero" <tallerbiogas at hotmail.com>
To: <digestion at listserv.repp.org>; <david at h4c.org>
Sent: Saturday, July 18, 2009 12:01 AM
Subject: Re: [Digestion] Filter



About  HS2 and cooking and lighting...
In Bolivia we found that on household biodigesters, the burner keep in good 
conditions for the first year, after that, must be change. But the main 
problem came from the families experience: they say that the food taste 
different when is cooked instead wood, and they say that there are no smoke 
(compared with wood cooking, of course) but there are an strange smell at 
the kitchen when they cook with biogas... These can be poroduced because not 
all the biogas is burned due the nurner is not propertly adaoted to biogas, 
but also due cultural aspects (they are accustomed  to wood cooking).

When we have tried to introduce small filters with iron wool, that can be 
found in any local market and cost 0.10 ?, we found they use it ones, the 
first time we install the filter, but no more...

We are still looking how to solve this issue.

any idea is wellcome
keep on going
jaime

-----
Jaime Mart? Herrero

BIOGAS AND BOLVIA
-Video: Biodigester installation in bolivian altiplane
http://es.youtube.com/watch?v=3Sl0XEN5Bgo
-Manual gratuito-Biodigestores familiares: Gu?a de dise?o y manual de 
instalaci?n
http://www.upc.edu/grecdh/pdf/2008_JMH_Guia_biodigestores.pdf





> From: bingham at zekes.com
> To: david at h4c.org; digestion at listserv.repp.org
> Date: Thu, 16 Jul 2009 19:21:41 -0700
> Subject: Re: [Digestion] Filter
>
> Bottom line any H2S is a problem. A system we set up in Mexico used the 
> gas
> to light and heat
> small buildings. The lamps coroded after only a few hundred hours. the H2S
> was barly detectable.
> Filters are a cheap easy way to protect every thing down streem. There is
> almost no way to controle
> most digesteters to a point no H2S is produced.
> Brent
> ----- Original Message ----- 
> From: "David" <david at h4c.org>
> To: "For discussion of Anaerobic Digestion" <digestion at listserv.repp.org>
> Sent: Thursday, July 16, 2009 6:44 PM
> Subject: Re: [Digestion] Filter
>
>
> >
> > Replying to my own post:
> >
> > David wrote:
> >> (H2S does not need to be removed to use the biogas for cooking or
> >> lighting.)
> >
> > In re-reading the statement, I think it is drawn too broadly. When H2S
> > burns with adequate oxygen, it produces sulfur dioxide, which can follow 
> > a
> > path to becoming either sulfurous or sulfuric acid. (That's what 
> > corrodes
> > the engine and breaks down the oil in the crankcase.)
> >
> > Clearly, there can be enough H2S in biogas that these corrosive 
> > molecules
> > are produced in great enough abundance to be problematic either to
> > breathe, or troublesome in their ultimate impact on exhaust systems. 
> > Just
> > how much H2S to fear would have to be evaluated in each circumstance, 
> > but
> > my impression is that it is likely above the amount that would cause
> > problems in engines. (Anyone have better information?) On the other 
> > hand,
> > I think the standard should be "What if it were my child who is 
> > breathing
> > the air?" Using the method linked in my last post, one should be able to
> > determine the approximate level of H2S, and on that basis and-- if it
> > appears safe enough-- a subsequent "sniff test" of the burned gases 
> > would
> > offer a rough guide to whether to scrub or not.
> >
> >
> >
> >
> >
> > d.
> > -- 
> > David William House
> > "The Complete Biogas Handbook" |www.completebiogas.com|
> > /Vahid Biogas/, an alternative energy consultancy |www.vahidbiogas.com
> >
> > |
> > "Make no search for water.       But find thirst,
> > And water from the very ground will burst."
> > (Rumi, a Persian mystic poet, quoted in /Delight of Hearts/, p. 77)
> >
> > http://bahai.us/
> > _______________________________________________
> > Digestion mailing list
> > Digestion at listserv.repp.org
> > http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
> > Beginner's Guide to Biogas
> > http://www.adelaide.edu.au/biogas/
> > http://info.bioenergylists.org
> >
>
> _______________________________________________
> Digestion mailing list
> Digestion at listserv.repp.org
> http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
> Beginner's Guide to Biogas
> http://www.adelaide.edu.au/biogas/
> http://info.bioenergylists.org

_________________________________________________________________
News, entertainment and everything you care about at Live.com. Get it now!
http://www.live.com/getstarted.aspx
_______________________________________________
Digestion mailing list
Digestion at listserv.repp.org
http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
Beginner's Guide to Biogas
http://www.adelaide.edu.au/biogas/
http://info.bioenergylists.org 



From renertech at xtra.co.nz  Sat Jul 18 03:05:24 2009
From: renertech at xtra.co.nz (Ken Calvert)
Date: Sat, 18 Jul 2009 20:05:24 +1200
Subject: [Digestion] H2S Filter. Oops I forgot!
References: <009301ca0643$b1988a20$14c99e60$@avalos@avaloninmobiliaria.com.mx><4A5FB798.3080907@h4c.org><4A5FD795.2020000@h4c.org>
	<632567D3DF7041FEA76F3FCCB0F53741@Portable>
	<SNT115-W486C2A430C032AF793C55ADC1E0@phx.gbl>
Message-ID: <9460059F0B894DF89A36CAB48EC48D0F@MARTHA>

Don't forget to add a drain at the bottom of the drum, because these things 
trap a lot more water than they do H2S.
----- Original Message ----- 
From: "Jaime Marti Herrero" <tallerbiogas at hotmail.com>
To: <digestion at listserv.repp.org>; <david at h4c.org>
Sent: Saturday, July 18, 2009 12:01 AM
Subject: Re: [Digestion] Filter



About  HS2 and cooking and lighting...
In Bolivia we found that on household biodigesters, the burner keep in good 
conditions for the first year, after that, must be change. But the main 
problem came from the families experience: they say that the food taste 
different when is cooked instead wood, and they say that there are no smoke 
(compared with wood cooking, of course) but there are an strange smell at 
the kitchen when they cook with biogas... These can be poroduced because not 
all the biogas is burned due the nurner is not propertly adaoted to biogas, 
but also due cultural aspects (they are accustomed  to wood cooking).

When we have tried to introduce small filters with iron wool, that can be 
found in any local market and cost 0.10 ?, we found they use it ones, the 
first time we install the filter, but no more...

We are still looking how to solve this issue.

any idea is wellcome
keep on going
jaime

-----
Jaime Mart? Herrero

BIOGAS AND BOLVIA
-Video: Biodigester installation in bolivian altiplane
http://es.youtube.com/watch?v=3Sl0XEN5Bgo
-Manual gratuito-Biodigestores familiares: Gu?a de dise?o y manual de 
instalaci?n
http://www.upc.edu/grecdh/pdf/2008_JMH_Guia_biodigestores.pdf





> From: bingham at zekes.com
> To: david at h4c.org; digestion at listserv.repp.org
> Date: Thu, 16 Jul 2009 19:21:41 -0700
> Subject: Re: [Digestion] Filter
>
> Bottom line any H2S is a problem. A system we set up in Mexico used the 
> gas
> to light and heat
> small buildings. The lamps coroded after only a few hundred hours. the H2S
> was barly detectable.
> Filters are a cheap easy way to protect every thing down streem. There is
> almost no way to controle
> most digesteters to a point no H2S is produced.
> Brent
> ----- Original Message ----- 
> From: "David" <david at h4c.org>
> To: "For discussion of Anaerobic Digestion" <digestion at listserv.repp.org>
> Sent: Thursday, July 16, 2009 6:44 PM
> Subject: Re: [Digestion] Filter
>
>
> >
> > Replying to my own post:
> >
> > David wrote:
> >> (H2S does not need to be removed to use the biogas for cooking or
> >> lighting.)
> >
> > In re-reading the statement, I think it is drawn too broadly. When H2S
> > burns with adequate oxygen, it produces sulfur dioxide, which can follow 
> > a
> > path to becoming either sulfurous or sulfuric acid. (That's what 
> > corrodes
> > the engine and breaks down the oil in the crankcase.)
> >
> > Clearly, there can be enough H2S in biogas that these corrosive 
> > molecules
> > are produced in great enough abundance to be problematic either to
> > breathe, or troublesome in their ultimate impact on exhaust systems. 
> > Just
> > how much H2S to fear would have to be evaluated in each circumstance, 
> > but
> > my impression is that it is likely above the amount that would cause
> > problems in engines. (Anyone have better information?) On the other 
> > hand,
> > I think the standard should be "What if it were my child who is 
> > breathing
> > the air?" Using the method linked in my last post, one should be able to
> > determine the approximate level of H2S, and on that basis and-- if it
> > appears safe enough-- a subsequent "sniff test" of the burned gases 
> > would
> > offer a rough guide to whether to scrub or not.
> >
> >
> >
> >
> >
> > d.
> > -- 
> > David William House
> > "The Complete Biogas Handbook" |www.completebiogas.com|
> > /Vahid Biogas/, an alternative energy consultancy |www.vahidbiogas.com
> >
> > |
> > "Make no search for water.       But find thirst,
> > And water from the very ground will burst."
> > (Rumi, a Persian mystic poet, quoted in /Delight of Hearts/, p. 77)
> >
> > http://bahai.us/
> > _______________________________________________
> > Digestion mailing list
> > Digestion at listserv.repp.org
> > http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
> > Beginner's Guide to Biogas
> > http://www.adelaide.edu.au/biogas/
> > http://info.bioenergylists.org
> >
>
> _______________________________________________
> Digestion mailing list
> Digestion at listserv.repp.org
> http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
> Beginner's Guide to Biogas
> http://www.adelaide.edu.au/biogas/
> http://info.bioenergylists.org

_________________________________________________________________
News, entertainment and everything you care about at Live.com. Get it now!
http://www.live.com/getstarted.aspx
_______________________________________________
Digestion mailing list
Digestion at listserv.repp.org
http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
Beginner's Guide to Biogas
http://www.adelaide.edu.au/biogas/
http://info.bioenergylists.org 



From bingham at zekes.com  Sat Jul 18 17:32:03 2009
From: bingham at zekes.com (bingham)
Date: Sat, 18 Jul 2009 15:32:03 -0700
Subject: [Digestion] Filter Don't use potscrubs! They are too fine.
References: <009301ca0643$b1988a20$14c99e60$@avalos@avaloninmobiliaria.com.mx><4A5FB798.3080907@h4c.org><4A5FD795.2020000@h4c.org><632567D3DF7041FEA76F3FCCB0F53741@Portable><SNT115-W486C2A430C032AF793C55ADC1E0@phx.gbl>
	<075C45759C09423AA6845D3A3A5CE900@MARTHA>
Message-ID: <5B57FE96D2114F27902C6015F88CBDBC@Portable>

Ken,
If the cans are covered with tin, will they react with the H2S as well and 
rusty ones?
We had some problems with steel drums lasting very long were we using the 
wrong
type? We found a drum recycler that made drums with removable tops, which 
had bungs.
Brent

----- Original Message ----- 
From: "Ken Calvert" <renertech at xtra.co.nz>
To: "For discussion of Anaerobic Digestion" <digestion at listserv.repp.org>
Sent: Saturday, July 18, 2009 12:57 AM
Subject: Re: [Digestion] Filter Don't use potscrubs! They are too fine.


Here we go again!  Very finely divided iron 'wool' like as in pot
mitts/scrubs falls apart and becomes a thin layer of powder in the bottom of
the filter.  Whereas bashed up steel cans and Lathe turnings still stay in
shape  and hold their structure and surface area for much longer.   Besides,
its about the dearest way to get suitable iron metal to build an adequate
biogas filter.  I favour an old 200 litre oil or gasoline drum, modified to
give two 50mm holes in the top.  The cans should be bashed to the point that
they can be pushed down through one 50mm bung hole, and the other with a
piece of  50mm pipe that goes down to nearly the base of the drum.  The
metal of the drum being of heavier guage than the steel cans, the drum will
not collapse before the filter itself becomes choked with sulfur and the
metal cans collapse into the bottom of the drum.
     Despite being called rotten egg gas and having a foul smell, you can
actually taste H2S on the tongue at something like 50,000 parts to 1. Thats
long before it becomes strong enough to smell.  So, those folks that
complain about the taste are quite correct.  The only good level of H2S in
biogas is 0. Zilch!.    Ken C.

----- Original Message ----- 
From: "Jaime Marti Herrero" <tallerbiogas at hotmail.com>
To: <digestion at listserv.repp.org>; <david at h4c.org>
Sent: Saturday, July 18, 2009 12:01 AM
Subject: Re: [Digestion] Filter



About  HS2 and cooking and lighting...
In Bolivia we found that on household biodigesters, the burner keep in good
conditions for the first year, after that, must be change. But the main
problem came from the families experience: they say that the food taste
different when is cooked instead wood, and they say that there are no smoke
(compared with wood cooking, of course) but there are an strange smell at
the kitchen when they cook with biogas... These can be poroduced because not
all the biogas is burned due the nurner is not propertly adaoted to biogas,
but also due cultural aspects (they are accustomed  to wood cooking).

When we have tried to introduce small filters with iron wool, that can be
found in any local market and cost 0.10 ?, we found they use it ones, the
first time we install the filter, but no more...

We are still looking how to solve this issue.

any idea is wellcome
keep on going
jaime

-----
Jaime Mart? Herrero

BIOGAS AND BOLVIA
-Video: Biodigester installation in bolivian altiplane
http://es.youtube.com/watch?v=3Sl0XEN5Bgo
-Manual gratuito-Biodigestores familiares: Gu?a de dise?o y manual de
instalaci?n
http://www.upc.edu/grecdh/pdf/2008_JMH_Guia_biodigestores.pdf





> From: bingham at zekes.com
> To: david at h4c.org; digestion at listserv.repp.org
> Date: Thu, 16 Jul 2009 19:21:41 -0700
> Subject: Re: [Digestion] Filter
>
> Bottom line any H2S is a problem. A system we set up in Mexico used the 
> gas
> to light and heat
> small buildings. The lamps coroded after only a few hundred hours. the H2S
> was barly detectable.
> Filters are a cheap easy way to protect every thing down streem. There is
> almost no way to controle
> most digesteters to a point no H2S is produced.
> Brent
> ----- Original Message ----- 
> From: "David" <david at h4c.org>
> To: "For discussion of Anaerobic Digestion" <digestion at listserv.repp.org>
> Sent: Thursday, July 16, 2009 6:44 PM
> Subject: Re: [Digestion] Filter
>
>
> >
> > Replying to my own post:
> >
> > David wrote:
> >> (H2S does not need to be removed to use the biogas for cooking or
> >> lighting.)
> >
> > In re-reading the statement, I think it is drawn too broadly. When H2S
> > burns with adequate oxygen, it produces sulfur dioxide, which can follow 
> > a
> > path to becoming either sulfurous or sulfuric acid. (That's what 
> > corrodes
> > the engine and breaks down the oil in the crankcase.)
> >
> > Clearly, there can be enough H2S in biogas that these corrosive 
> > molecules
> > are produced in great enough abundance to be problematic either to
> > breathe, or troublesome in their ultimate impact on exhaust systems. 
> > Just
> > how much H2S to fear would have to be evaluated in each circumstance, 
> > but
> > my impression is that it is likely above the amount that would cause
> > problems in engines. (Anyone have better information?) On the other 
> > hand,
> > I think the standard should be "What if it were my child who is 
> > breathing
> > the air?" Using the method linked in my last post, one should be able to
> > determine the approximate level of H2S, and on that basis and-- if it
> > appears safe enough-- a subsequent "sniff test" of the burned gases 
> > would
> > offer a rough guide to whether to scrub or not.
> >
> >
> >
> >
> >
> > d.
> > -- 
> > David William House
> > "The Complete Biogas Handbook" |www.completebiogas.com|
> > /Vahid Biogas/, an alternative energy consultancy |www.vahidbiogas.com
> >
> > |
> > "Make no search for water.       But find thirst,
> > And water from the very ground will burst."
> > (Rumi, a Persian mystic poet, quoted in /Delight of Hearts/, p. 77)
> >
> > http://bahai.us/
> > _______________________________________________
> > Digestion mailing list
> > Digestion at listserv.repp.org
> > http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
> > Beginner's Guide to Biogas
> > http://www.adelaide.edu.au/biogas/
> > http://info.bioenergylists.org
> >
>
> _______________________________________________
> Digestion mailing list
> Digestion at listserv.repp.org
> http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
> Beginner's Guide to Biogas
> http://www.adelaide.edu.au/biogas/
> http://info.bioenergylists.org

_________________________________________________________________
News, entertainment and everything you care about at Live.com. Get it now!
http://www.live.com/getstarted.aspx
_______________________________________________
Digestion mailing list
Digestion at listserv.repp.org
http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
Beginner's Guide to Biogas
http://www.adelaide.edu.au/biogas/
http://info.bioenergylists.org


_______________________________________________
Digestion mailing list
Digestion at listserv.repp.org
http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
Beginner's Guide to Biogas
http://www.adelaide.edu.au/biogas/
http://info.bioenergylists.org



From nguyendan1941 at yahoo.com.vn  Sat Jul 18 21:07:46 2009
From: nguyendan1941 at yahoo.com.vn (nguyen dan)
Date: Sun, 19 Jul 2009 10:07:46 +0800 (SGT)
Subject: [Digestion] anaerobic digestion
Message-ID: <821371.13756.qm@web76214.mail.sg1.yahoo.com>

?I don't understand how realize retention time? under optimum condistions in the anaerobic digestion. if you have the material about it, send me please thank all of you very much.


      B?n lu?n mu?n k?t n?i v?i nhi?u b?n b? h?n tr?n blog v? trang web c? nh?n? T?o Pingbox m?i nh?t ngay h?m nay! http://vn.messenger.yahoo.com/pingbox/

From srinivaskasulla at gmail.com  Sun Jul 19 13:00:29 2009
From: srinivaskasulla at gmail.com (Srinivas Kasulla)
Date: Sun, 19 Jul 2009 23:30:29 +0530
Subject: [Digestion] Digestion Digest, Vol 37, Issue 5
In-Reply-To: <mailman.7.1247936402.10679.digestion_listserv.repp.org@listserv.repp.org>
References: <mailman.7.1247936402.10679.digestion_listserv.repp.org@listserv.repp.org>
Message-ID: <c9e90ad70907191100u7a36e2c2h5a1bf835ff5528ab@mail.gmail.com>

Dear All,
Yes H2S scrubbers work very well with iron fillings/scrap filled in
Stainless stell or plastic drums but make sure water is drained before it
enters the system for which some moisture traps can be added before the
system or some drain points have to be introduced at the bottom of the
system (but according to me moisture traps before system works exceptionally
well).
Here the main point is one should understand how much Iron sponge/scrap
needs to be added to scrub the gas that is what more important, and
depending on that amount one should regularly change the same and keep it to
open to the atmosphere so that it is usable again,
David and my other friends i have a good suggestion can you please comment
on it - i have tried using iron sponge for small scale H2S scrubbers and to
avoid the moisture problems i have added a moisture trap before the h2s
scrubber and to be 100% safe i have added WOOD SHAVINGS alongwith iron
sponge/fillings which absorbs excess moisture in the gas and it worked quite
well and is still working without any problem.
Hope so this works for everyone,

regards
srinivas kasulla
srinivaskasulla at gmail.com

On Sat, Jul 18, 2009 at 10:30 PM, <digestion-request at listserv.repp.org>wrote:

> Send Digestion mailing list submissions to
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>
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>
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> or, via email, send a message with subject or body 'help' to
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>
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>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of Digestion digest..."
>
>
> Today's Topics:
>
>   1. Re: Filter (Ken Calvert)
>   2. Re: Filter Don't use potscrubs! They are too fine. (Ken Calvert)
>   3. Re: H2S Filter. Oops I forgot! (Ken Calvert)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sat, 18 Jul 2009 18:42:10 +1200
> From: "Ken Calvert" <renertech at xtra.co.nz>
> Subject: Re: [Digestion] Filter
> To: "For discussion of Anaerobic Digestion"
>        <digestion at listserv.repp.org>
> Message-ID: <FABB6E04EFD6438789F2AE3E0659CA1A at MARTHA>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
>        reply-type=response
>
> Heh don't even bother to shred the tin cans, just bash them together into
> as
> small a volume as possible to get maximum surface area per unit volume.
> Much
> more than you can get with metal turnings.  Yes, either rust or iron metal
> will react with damp H2S, but the point of using rusty cans is that the
> varnish coating that goes on cans in lieu of metalic tin to stop fruit
> acids
> corroding the metal has to be mostly removed before they will work.  The
> ferrous sulphide will oxide to form grey metalic iron and elemental
> 'flowers
> of sulphur'   which will ultimately choke the barrell, but you will be
> replacing the barrel long before that.  If you use a  plastic barrel to
> stop
> it also corroding be very careful  at how you let the air into it because a
> lot of heat is evolved in the reaction to regerate the metalic iron.
> A.T.B. Ken C.
> ----- Original Message -----
> From: "bingham" <bingham at zekes.com>
> To: "For discussion of Anaerobic Digestion" <digestion at listserv.repp.org>
> Sent: Friday, July 17, 2009 8:23 AM
> Subject: Re: [Digestion] Filter
>
>
> We have found that the turnings from machine shops work best.
> Clean off the cutting oil with soap and let them sit out, they are
> ready to use. Do not get the stainless or aluminum.
> Brent
> ----- Original Message -----
> From: "Bruno M." <brunoM1 at telenet.be>
> To: <digestion at listserv.repp.org>
> Sent: Thursday, July 16, 2009 12:22 PM
> Subject: Re: [Digestion] Filter
>
>
> Real cheap is a vessel filled with rusty (shreded) tincans. ( you want the
> rust)
>
> Guide the wet biogas trough it and the H2S reacts to FeS. ( iron sulphide)
> with 2 vessels you can use one and regenerate the other.
> Regenerating is done by slowely (!) allow air in the saturated vessel(
> taken
> out of the cicuit)
> then oxygen of the air oxidize the FeS to ferro-oxide, Sulfur and heat.
>
> There are other possibilities, like bioscrubbers, or chemical scrubbers.
> It may depend on how clean does the gas need to be?
>
> grts
> Bruno M.
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> At 20:31 16/07/2009, you wrote:
> >Hello all
> >
> >A question from Mexico. Could someone help with information about a good
> >(and cheap) H2S filter?
> >
> >Thanks for your help.
> >
> >
> >Arturo ?valos
> >==============================================================
> >
>
>
> _______________________________________________
> Digestion mailing list
> Digestion at listserv.repp.org
> http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
> Beginner's Guide to Biogas
> http://www.adelaide.edu.au/biogas/
> http://info.bioenergylists.org
>
>
> _______________________________________________
> Digestion mailing list
> Digestion at listserv.repp.org
> http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
> Beginner's Guide to Biogas
> http://www.adelaide.edu.au/biogas/
> http://info.bioenergylists.org
>
>
>
>
> ------------------------------
>
> Message: 2
> Date: Sat, 18 Jul 2009 19:57:14 +1200
> From: "Ken Calvert" <renertech at xtra.co.nz>
> Subject: Re: [Digestion] Filter Don't use potscrubs! They are too
>        fine.
> To: "For discussion of Anaerobic Digestion"
>        <digestion at listserv.repp.org>
> Message-ID: <075C45759C09423AA6845D3A3A5CE900 at MARTHA>
> Content-Type: text/plain; format=flowed; charset="Windows-1252";
>        reply-type=original
>
> Here we go again!  Very finely divided iron 'wool' like as in pot
> mitts/scrubs falls apart and becomes a thin layer of powder in the bottom
> of
> the filter.  Whereas bashed up steel cans and Lathe turnings still stay in
> shape  and hold their structure and surface area for much longer.
> Besides,
> its about the dearest way to get suitable iron metal to build an adequate
> biogas filter.  I favour an old 200 litre oil or gasoline drum, modified to
> give two 50mm holes in the top.  The cans should be bashed to the point
> that
> they can be pushed down through one 50mm bung hole, and the other with a
> piece of  50mm pipe that goes down to nearly the base of the drum.  The
> metal of the drum being of heavier guage than the steel cans, the drum will
> not collapse before the filter itself becomes choked with sulfur and the
> metal cans collapse into the bottom of the drum.
>     Despite being called rotten egg gas and having a foul smell, you can
> actually taste H2S on the tongue at something like 50,000 parts to 1. Thats
> long before it becomes strong enough to smell.  So, those folks that
> complain about the taste are quite correct.  The only good level of H2S in
> biogas is 0. Zilch!.    Ken C.
>
> ----- Original Message -----
> From: "Jaime Marti Herrero" <tallerbiogas at hotmail.com>
> To: <digestion at listserv.repp.org>; <david at h4c.org>
> Sent: Saturday, July 18, 2009 12:01 AM
> Subject: Re: [Digestion] Filter
>
>
>
> About  HS2 and cooking and lighting...
> In Bolivia we found that on household biodigesters, the burner keep in good
> conditions for the first year, after that, must be change. But the main
> problem came from the families experience: they say that the food taste
> different when is cooked instead wood, and they say that there are no smoke
> (compared with wood cooking, of course) but there are an strange smell at
> the kitchen when they cook with biogas... These can be poroduced because
> not
> all the biogas is burned due the nurner is not propertly adaoted to biogas,
> but also due cultural aspects (they are accustomed  to wood cooking).
>
> When we have tried to introduce small filters with iron wool, that can be
> found in any local market and cost 0.10 ?, we found they use it ones, the
> first time we install the filter, but no more...
>
> We are still looking how to solve this issue.
>
> any idea is wellcome
> keep on going
> jaime
>
> -----
> Jaime Mart? Herrero
>
> BIOGAS AND BOLVIA
> -Video: Biodigester installation in bolivian altiplane
> http://es.youtube.com/watch?v=3Sl0XEN5Bgo
> -Manual gratuito-Biodigestores familiares: Gu?a de dise?o y manual de
> instalaci?n
> http://www.upc.edu/grecdh/pdf/2008_JMH_Guia_biodigestores.pdf
>
>
>
>
>
> > From: bingham at zekes.com
> > To: david at h4c.org; digestion at listserv.repp.org
> > Date: Thu, 16 Jul 2009 19:21:41 -0700
> > Subject: Re: [Digestion] Filter
> >
> > Bottom line any H2S is a problem. A system we set up in Mexico used the
> > gas
> > to light and heat
> > small buildings. The lamps coroded after only a few hundred hours. the
> H2S
> > was barly detectable.
> > Filters are a cheap easy way to protect every thing down streem. There is
> > almost no way to controle
> > most digesteters to a point no H2S is produced.
> > Brent
> > ----- Original Message -----
> > From: "David" <david at h4c.org>
> > To: "For discussion of Anaerobic Digestion" <digestion at listserv.repp.org
> >
> > Sent: Thursday, July 16, 2009 6:44 PM
> > Subject: Re: [Digestion] Filter
> >
> >
> > >
> > > Replying to my own post:
> > >
> > > David wrote:
> > >> (H2S does not need to be removed to use the biogas for cooking or
> > >> lighting.)
> > >
> > > In re-reading the statement, I think it is drawn too broadly. When H2S
> > > burns with adequate oxygen, it produces sulfur dioxide, which can
> follow
> > > a
> > > path to becoming either sulfurous or sulfuric acid. (That's what
> > > corrodes
> > > the engine and breaks down the oil in the crankcase.)
> > >
> > > Clearly, there can be enough H2S in biogas that these corrosive
> > > molecules
> > > are produced in great enough abundance to be problematic either to
> > > breathe, or troublesome in their ultimate impact on exhaust systems.
> > > Just
> > > how much H2S to fear would have to be evaluated in each circumstance,
> > > but
> > > my impression is that it is likely above the amount that would cause
> > > problems in engines. (Anyone have better information?) On the other
> > > hand,
> > > I think the standard should be "What if it were my child who is
> > > breathing
> > > the air?" Using the method linked in my last post, one should be able
> to
> > > determine the approximate level of H2S, and on that basis and-- if it
> > > appears safe enough-- a subsequent "sniff test" of the burned gases
> > > would
> > > offer a rough guide to whether to scrub or not.
> > >
> > >
> > >
> > >
> > >
> > > d.
> > > --
> > > David William House
> > > "The Complete Biogas Handbook" |www.completebiogas.com|
> > > /Vahid Biogas/, an alternative energy consultancy |www.vahidbiogas.com
> > >
> > > |
> > > "Make no search for water.       But find thirst,
> > > And water from the very ground will burst."
> > > (Rumi, a Persian mystic poet, quoted in /Delight of Hearts/, p. 77)
> > >
> > > http://bahai.us/
> > > _______________________________________________
> > > Digestion mailing list
> > > Digestion at listserv.repp.org
> > > http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
> > > Beginner's Guide to Biogas
> > > http://www.adelaide.edu.au/biogas/
> > > http://info.bioenergylists.org
> > >
> >
> > _______________________________________________
> > Digestion mailing list
> > Digestion at listserv.repp.org
> > http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
> > Beginner's Guide to Biogas
> > http://www.adelaide.edu.au/biogas/
> > http://info.bioenergylists.org
>
> _________________________________________________________________
> News, entertainment and everything you care about at Live.com. Get it now!
> http://www.live.com/getstarted.aspx
> _______________________________________________
> Digestion mailing list
> Digestion at listserv.repp.org
> http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
> Beginner's Guide to Biogas
> http://www.adelaide.edu.au/biogas/
> http://info.bioenergylists.org
>
>
>
>
> ------------------------------
>
> Message: 3
> Date: Sat, 18 Jul 2009 20:05:24 +1200
> From: "Ken Calvert" <renertech at xtra.co.nz>
> Subject: Re: [Digestion] H2S Filter. Oops I forgot!
> To: "For discussion of Anaerobic Digestion"
>        <digestion at listserv.repp.org>
> Message-ID: <9460059F0B894DF89A36CAB48EC48D0F at MARTHA>
> Content-Type: text/plain; format=flowed; charset="Windows-1252";
>        reply-type=original
>
> Don't forget to add a drain at the bottom of the drum, because these things
> trap a lot more water than they do H2S.
> ----- Original Message -----
> From: "Jaime Marti Herrero" <tallerbiogas at hotmail.com>
> To: <digestion at listserv.repp.org>; <david at h4c.org>
> Sent: Saturday, July 18, 2009 12:01 AM
> Subject: Re: [Digestion] Filter
>
>
>
> About  HS2 and cooking and lighting...
> In Bolivia we found that on household biodigesters, the burner keep in good
> conditions for the first year, after that, must be change. But the main
> problem came from the families experience: they say that the food taste
> different when is cooked instead wood, and they say that there are no smoke
> (compared with wood cooking, of course) but there are an strange smell at
> the kitchen when they cook with biogas... These can be poroduced because
> not
> all the biogas is burned due the nurner is not propertly adaoted to biogas,
> but also due cultural aspects (they are accustomed  to wood cooking).
>
> When we have tried to introduce small filters with iron wool, that can be
> found in any local market and cost 0.10 ?, we found they use it ones, the
> first time we install the filter, but no more...
>
> We are still looking how to solve this issue.
>
> any idea is wellcome
> keep on going
> jaime
>
> -----
> Jaime Mart? Herrero
>
> BIOGAS AND BOLVIA
> -Video: Biodigester installation in bolivian altiplane
> http://es.youtube.com/watch?v=3Sl0XEN5Bgo
> -Manual gratuito-Biodigestores familiares: Gu?a de dise?o y manual de
> instalaci?n
> http://www.upc.edu/grecdh/pdf/2008_JMH_Guia_biodigestores.pdf
>
>
>
>
>
> > From: bingham at zekes.com
> > To: david at h4c.org; digestion at listserv.repp.org
> > Date: Thu, 16 Jul 2009 19:21:41 -0700
> > Subject: Re: [Digestion] Filter
> >
> > Bottom line any H2S is a problem. A system we set up in Mexico used the
> > gas
> > to light and heat
> > small buildings. The lamps coroded after only a few hundred hours. the
> H2S
> > was barly detectable.
> > Filters are a cheap easy way to protect every thing down streem. There is
> > almost no way to controle
> > most digesteters to a point no H2S is produced.
> > Brent
> > ----- Original Message -----
> > From: "David" <david at h4c.org>
> > To: "For discussion of Anaerobic Digestion" <digestion at listserv.repp.org
> >
> > Sent: Thursday, July 16, 2009 6:44 PM
> > Subject: Re: [Digestion] Filter
> >
> >
> > >
> > > Replying to my own post:
> > >
> > > David wrote:
> > >> (H2S does not need to be removed to use the biogas for cooking or
> > >> lighting.)
> > >
> > > In re-reading the statement, I think it is drawn too broadly. When H2S
> > > burns with adequate oxygen, it produces sulfur dioxide, which can
> follow
> > > a
> > > path to becoming either sulfurous or sulfuric acid. (That's what
> > > corrodes
> > > the engine and breaks down the oil in the crankcase.)
> > >
> > > Clearly, there can be enough H2S in biogas that these corrosive
> > > molecules
> > > are produced in great enough abundance to be problematic either to
> > > breathe, or troublesome in their ultimate impact on exhaust systems.
> > > Just
> > > how much H2S to fear would have to be evaluated in each circumstance,
> > > but
> > > my impression is that it is likely above the amount that would cause
> > > problems in engines. (Anyone have better information?) On the other
> > > hand,
> > > I think the standard should be "What if it were my child who is
> > > breathing
> > > the air?" Using the method linked in my last post, one should be able
> to
> > > determine the approximate level of H2S, and on that basis and-- if it
> > > appears safe enough-- a subsequent "sniff test" of the burned gases
> > > would
> > > offer a rough guide to whether to scrub or not.
> > >
> > >
> > >
> > >
> > >
> > > d.
> > > --
> > > David William House
> > > "The Complete Biogas Handbook" |www.completebiogas.com|
> > > /Vahid Biogas/, an alternative energy consultancy |www.vahidbiogas.com
> > >
> > > |
> > > "Make no search for water.       But find thirst,
> > > And water from the very ground will burst."
> > > (Rumi, a Persian mystic poet, quoted in /Delight of Hearts/, p. 77)
> > >
> > > http://bahai.us/
> > > _______________________________________________
> > > Digestion mailing list
> > > Digestion at listserv.repp.org
> > > http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
> > > Beginner's Guide to Biogas
> > > http://www.adelaide.edu.au/biogas/
> > > http://info.bioenergylists.org
> > >
> >
> > _______________________________________________
> > Digestion mailing list
> > Digestion at listserv.repp.org
> > http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
> > Beginner's Guide to Biogas
> > http://www.adelaide.edu.au/biogas/
> > http://info.bioenergylists.org
>
> _________________________________________________________________
> News, entertainment and everything you care about at Live.com. Get it now!
> http://www.live.com/getstarted.aspx
> _______________________________________________
> Digestion mailing list
> Digestion at listserv.repp.org
> http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
> Beginner's Guide to Biogas
> http://www.adelaide.edu.au/biogas/
> http://info.bioenergylists.org
>
>
>
>
> ------------------------------
>
> _______________________________________________
> Digestion mailing list
> Digestion at listserv.repp.org
> http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
>
> End of Digestion Digest, Vol 37, Issue 5
> ****************************************
>



-- 
SRINIVAS KASULLA
Director (Engg)
Green Leaf Renewable Energy Pvt. Ltd.
D III, Plot No.3,Kamla Education Campus,
Off Mumbai Pune Highway,
Chinchwad,Pune. 411019.
09004689601
09869179601

From Frank.Scholwin at dbfz.de  Sun Jul 19 16:31:11 2009
From: Frank.Scholwin at dbfz.de (Frank Scholwin)
Date: Sun, 19 Jul 2009 23:31:11 +0200
Subject: [Digestion] =?iso-8859-1?q?AUTO=3A_Frank_Scholwin_ist_au=DFer_Hau?=
 =?iso-8859-1?q?s_/_Frank_Scholwin_is_out_of_office?=
Message-ID: <OFBDA441AA.F5D1548E-ONC12575F8.0076366E-C12575F8.0076366E@dbfz.de>


Ich bin von Di 05/12/2009 bis Fr 07/31/2009 abwesend.

Sehr geehrte Damen und Herren,
Sie k?nnen mich in meinem Urlaub leider nicht per e-mail erreichen, ich
werde Ihnen aber ab 2. August antworten. Wenn Sie eine fr?here R?ckmeldung
ben?tigen wenden Sie sich bitte an unser Sekretariat: info at dbfz.de;
+49-(0)341-2434-112.
herzlichen Dank
Frank Scholwin

Dear Ladies and Gentlemen,
during my holiday you cannot reach me via e-mail. I will respond to you
after 2nd August. If you need an earlier answer please contact our office
at info at dbfz.de; +49-(0)341-2434-112.
best regards,
Frank Scholwin


Hinweis: Dies ist eine automatische Antwort auf Ihre Nachricht  "
[Digestion] New biogas reports from case studies in developing
countries" gesendet am 6/4/09 14:24:17.

Diese ist die einzige Benachrichtigung, die Sie empfangen werden, w?hrend
diese Person abwesend ist.



From paul.harris at adelaide.edu.au  Sun Jul 19 19:26:57 2009
From: paul.harris at adelaide.edu.au (Paul Harris)
Date: Mon, 20 Jul 2009 09:56:57 +0930
Subject: [Digestion] anaerobic digestion
In-Reply-To: <821371.13756.qm@web76214.mail.sg1.yahoo.com>
Message-ID: <000101ca08d0$d07c3060$e5ac7f81@ad.adelaide.edu.au>

G'day Nguyen,
 
How do you define "optimum", as retention time and conditions may well be
different if you want "maximum biogas" compared to needing "smallest
digester"?

There is an Excel model you can use to look at this at
http://www.adelaide.edu.au/biogas/anaerobic_digestion/model/digcalc.zip

Have fun,
HOOROO

Mr. Paul Harris, Room G8, Leske Building
Faculty of Sciences, The  University of Adelaide, Roseworthy Campus,
AUSTRALIA 5371
Ph    : +61 8 8303 7880      Fax   : +61 8 8303 7979
mailto:paul.harris at adelaide.edu.au
http://www.adelaide.edu.au/directory/paul.harris

CRICOS Provider Number 00123M
This email message is intended only for the addressee(s) and contains
information that may be confidential and/or copyright.  If you are not the
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recipient.
-----Original Message-----
From: digestion-bounces at listserv.repp.org
[mailto:digestion-bounces at listserv.repp.org] On Behalf Of nguyen dan
Sent: Sunday, 19 July 2009 11:38 am
To: digestion at listserv.repp.org
Subject: [Digestion] anaerobic digestion

?I don't understand how realize retention time? under optimum condistions in
the anaerobic digestion. if you have the material about it, send me please
thank all of you very much.


      B?n lu?n mu?n k?t n?i v?i nhi?u b?n b? hon tr?n blog v? trang web c?
nh?n? T?o Pingbox m?i nh?t ngay h?m nay!
http://vn.messenger.yahoo.com/pingbox/
_______________________________________________
Digestion mailing list
Digestion at listserv.repp.org
http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
Beginner's Guide to Biogas
http://www.adelaide.edu.au/biogas/
http://info.bioenergylists.org



From paul.harris at adelaide.edu.au  Mon Jul 27 18:45:11 2009
From: paul.harris at adelaide.edu.au (Paul Harris)
Date: Tue, 28 Jul 2009 09:15:11 +0930
Subject: [Digestion] List Activity
Message-ID: <001001ca0f14$4ef0b1c0$e5ac7f81@ad.adelaide.edu.au>

G'day All,

It appears that there may be/have been problems with the list server. If you
post a message you should get an acknowledgement almost immediately and be
able to see the post in the archives the next day - please let me know if
you have dificulties.

Happy digesting,
HOOROO

Mr. Paul Harris, Room G8, Leske Building
Faculty of Sciences, The  University of Adelaide, Roseworthy Campus,
AUSTRALIA 5371
Ph    : +61 8 8303 7880      Fax   : +61 8 8303 7979
mailto:paul.harris at adelaide.edu.au
http://www.adelaide.edu.au/directory/paul.harris

CRICOS Provider Number 00123M
This email message is intended only for the addressee(s) and contains
information that may be confidential and/or copyright.  If you are not the
intended recipient please notify the sender by reply email and immediately
delete this email. Use, disclosure or reproduction of this email by anyone
other than the intended recipient(s) is strictly prohibited. No
representation is made that this email or any attachments are free of
viruses. Virus scanning is recommended and is the responsibility of the
recipient.



From renertech at xtra.co.nz  Mon Jul 27 19:35:57 2009
From: renertech at xtra.co.nz (Ken Calvert)
Date: Tue, 28 Jul 2009 12:35:57 +1200
Subject: [Digestion] Just testing!!
Message-ID: <20627168A1A94DC0BD3BE19101EB44DE@MARTHA>


From afal2906 at gmail.com  Fri Jul 31 11:27:27 2009
From: afal2906 at gmail.com (=?ISO-8859-1?Q?Arturo_=C1valos?=)
Date: Fri, 31 Jul 2009 11:27:27 -0500
Subject: [Digestion] Internal Combustion Engines
Message-ID: <cb0c3f4e0907310927g14e1a312oc06fae8c5a54fccb@mail.gmail.com>

I would like to know how can I adapt a normal ICE (diesel, natural gas, etc)
to run with biogas and/or companies which manufactures engines for biogas
fuel.

*If someone can help me, I will appreciate it.*

*Regards,*
Arturo

From robertcs at centurytel.net  Fri Jul 31 12:11:15 2009
From: robertcs at centurytel.net (robert carl stout)
Date: Fri, 31 Jul 2009 12:11:15 -0500
Subject: [Digestion] Internal Combustion Engines
References: <cb0c3f4e0907310927g14e1a312oc06fae8c5a54fccb@mail.gmail.com>
Message-ID: <D779265F4F554B9E84382A1FB5F00348@DFYFT361>

some older briggs and stratton engines had adapters to natural gas
----- Original Message ----- 
From: "Arturo ?valos" <afal2906 at gmail.com>
To: <digestion at listserv.repp.org>
Sent: Friday, July 31, 2009 11:27 AM
Subject: [Digestion] Internal Combustion Engines


>I would like to know how can I adapt a normal ICE (diesel, natural gas, 
>etc)
> to run with biogas and/or companies which manufactures engines for biogas
> fuel.
>
> *If someone can help me, I will appreciate it.*
>
> *Regards,*
> Arturo
> _______________________________________________
> Digestion mailing list
> Digestion at listserv.repp.org
> http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
> Beginner's Guide to Biogas
> http://www.adelaide.edu.au/biogas/
> http://info.bioenergylists.org
> 



From jbohn at HWMA.net  Fri Jul 31 13:13:21 2009
From: jbohn at HWMA.net (Juliette Bohn)
Date: Fri, 31 Jul 2009 11:13:21 -0700
Subject: [Digestion] Internal Combustion Engines
In-Reply-To: <cb0c3f4e0907310927g14e1a312oc06fae8c5a54fccb@mail.gmail.com>
References: <cb0c3f4e0907310927g14e1a312oc06fae8c5a54fccb@mail.gmail.com>
Message-ID: <33406A7A0DE2FB4F89FB2AAFF4B599EA8CB024@mailserver.HWMA.LOCAL>

Hello, 

Manufacturers of engine generators that run on biogas fuel include:  Guascor, Waukesha, Caterpillar and Mann.  There are probably more out there, but this should get you started.  

-J. Bohn





Program Analyst  
Energy and Waste Management
Humboldt Waste Management Authority
1059 W. Hawthorne St.
Eureka CA, 95501
(707) 268-8680
-----Original Message-----
From: digestion-bounces at listserv.repp.org [mailto:digestion-bounces at listserv.repp.org] On Behalf Of Arturo ?valos
Sent: Friday, July 31, 2009 9:27 AM
To: digestion at listserv.repp.org
Subject: [Digestion] Internal Combustion Engines

I would like to know how can I adapt a normal ICE (diesel, natural gas, etc)
to run with biogas and/or companies which manufactures engines for biogas
fuel.

*If someone can help me, I will appreciate it.*

*Regards,*
Arturo
_______________________________________________
Digestion mailing list
Digestion at listserv.repp.org
http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
Beginner's Guide to Biogas
http://www.adelaide.edu.au/biogas/
http://info.bioenergylists.org


From heffalump at gmail.com  Fri Jul 31 13:38:24 2009
From: heffalump at gmail.com (Heffalump)
Date: Fri, 31 Jul 2009 19:38:24 +0100
Subject: [Digestion] Internal Combustion Engines
In-Reply-To: <33406A7A0DE2FB4F89FB2AAFF4B599EA8CB024@mailserver.HWMA.LOCAL>
References: <cb0c3f4e0907310927g14e1a312oc06fae8c5a54fccb@mail.gmail.com>
	<33406A7A0DE2FB4F89FB2AAFF4B599EA8CB024@mailserver.HWMA.LOCAL>
Message-ID: <9a115e610907311138t6433eacbya9cee070027a60c5@mail.gmail.com>

Jenbacher and Perkins are two more

Ian Smith

2009/7/31 Juliette Bohn <jbohn at hwma.net>

> Hello,
>
> Manufacturers of engine generators that run on biogas fuel include:
>  Guascor, Waukesha, Caterpillar and Mann.  There are probably more out
> there, but this should get you started.
>
> -J. Bohn
>
>
>
>
>
> Program Analyst
> Energy and Waste Management
> Humboldt Waste Management Authority
> 1059 W. Hawthorne St.
> Eureka CA, 95501
> (707) 268-8680
> -----Original Message-----
> From: digestion-bounces at listserv.repp.org [mailto:
> digestion-bounces at listserv.repp.org] On Behalf Of Arturo ?valos
> Sent: Friday, July 31, 2009 9:27 AM
> To: digestion at listserv.repp.org
> Subject: [Digestion] Internal Combustion Engines
>
> I would like to know how can I adapt a normal ICE (diesel, natural gas,
> etc)
> to run with biogas and/or companies which manufactures engines for biogas
> fuel.
>
> *If someone can help me, I will appreciate it.*
>
> *Regards,*
> Arturo
> _______________________________________________
> Digestion mailing list
> Digestion at listserv.repp.org
> http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
> Beginner's Guide to Biogas
> http://www.adelaide.edu.au/biogas/
> http://info.bioenergylists.org
>
> _______________________________________________
> Digestion mailing list
> Digestion at listserv.repp.org
> http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
> Beginner's Guide to Biogas
> http://www.adelaide.edu.au/biogas/
> http://info.bioenergylists.org
>

From weiswar at yahoo.com  Fri Jul 31 13:48:21 2009
From: weiswar at yahoo.com (Warren Weisman)
Date: Fri, 31 Jul 2009 11:48:21 -0700 (PDT)
Subject: [Digestion] Internal Combustion Engines
In-Reply-To: <cb0c3f4e0907310927g14e1a312oc06fae8c5a54fccb@mail.gmail.com>
Message-ID: <313754.53102.qm@web62305.mail.re1.yahoo.com>


Arturo, 

Any spark-ignited engine can be run with biogas. It runs just fine, whether the biogas is upgraded to biomethane or not. It requires tinkering with the air mixture and advancing the timing on a distributor to find the "sweet spot" where it fires. Depending on how clean your gas is, the engine may run unevenly. 

As someone else suggested, a two-stroke engine is a good (and cheap) place to start, but I ran a modern four-cycle Honda EU1000 generator with it. 

Biogas cannot run in diesel engines without being "admixed" with diesel to get it started, as diesels are not spark ignited, they are compression ignited. This is inefficient and should be avoided, however, most folks running on biogas are far from a diesel source, anyway.

If used for vehicle fuel, the problem will be range, in which case the gas will need to be compressed into a practical storage size. 

Warren Weisman
USA

"I say there is no darkness but ignorance." William Shakespeare


--- On Fri, 7/31/09, Arturo ?valos <afal2906 at gmail.com> wrote:

> From: Arturo ?valos <afal2906 at gmail.com>
> Subject: [Digestion] Internal Combustion Engines
> To: digestion at listserv.repp.org
> Date: Friday, July 31, 2009, 9:27 AM
> I would like to know how can I adapt
> a normal ICE (diesel, natural gas, etc)
> to run with biogas and/or companies which manufactures
> engines for biogas
> fuel.
> 
> *If someone can help me, I will appreciate it.*
> 
> *Regards,*
> Arturo
> _______________________________________________
> Digestion mailing list
> Digestion at listserv.repp.org
> http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
> Beginner's Guide to Biogas
> http://www.adelaide.edu.au/biogas/
> http://info.bioenergylists.org
> 


      


From weiswar at yahoo.com  Fri Jul 31 14:06:40 2009
From: weiswar at yahoo.com (Warren Weisman)
Date: Fri, 31 Jul 2009 12:06:40 -0700 (PDT)
Subject: [Digestion] Internal Combustion Engines: Manufacturers
In-Reply-To: <9a115e610907311138t6433eacbya9cee070027a60c5@mail.gmail.com>
Message-ID: <391380.2802.qm@web62302.mail.re1.yahoo.com>



As a mechanic, I would strongly recommend against Jenbacher. They are expensive, over-complicated, fragile and a mechanical nightmare. 

The best choice is a Caterpillar NG generator. They now have a "low-fuel" 3520 model for landfill generators that can run on 50% methane. On higher content gas they cannot be beat. They get better fuel consumption in addition to being cheaper, far more reliable and easier to repair, find parts for and rebuild. 

Be careful comparing the CAT and Jenbacher on paper, because Jenbacher likes to skew their numbers to make themselves look competitive. Talk to real operators. 

Warren Weisman
USA

"I say there is no darkness but ignorance." William Shakespeare


--- On Fri, 7/31/09, Heffalump <heffalump at gmail.com> wrote:

> From: Heffalump <heffalump at gmail.com>
> Subject: Re: [Digestion] Internal Combustion Engines
> To: "For discussion of Anaerobic Digestion" <digestion at listserv.repp.org>
> Date: Friday, July 31, 2009, 11:38 AM
> Jenbacher and Perkins are two more
> 
> Ian Smith
> 
> 2009/7/31 Juliette Bohn <jbohn at hwma.net>
> 
> > Hello,
> >
> > Manufacturers of engine generators that run on biogas
> fuel include:
> >? Guascor, Waukesha, Caterpillar and Mann.?
> There are probably more out
> > there, but this should get you started.
> >
> > -J. Bohn
> >
> >
> >
> >
> >
> > Program Analyst
> > Energy and Waste Management
> > Humboldt Waste Management Authority
> > 1059 W. Hawthorne St.
> > Eureka CA, 95501
> > (707) 268-8680
> > -----Original Message-----
> > From: digestion-bounces at listserv.repp.org
> [mailto:
> > digestion-bounces at listserv.repp.org]
> On Behalf Of Arturo ?valos
> > Sent: Friday, July 31, 2009 9:27 AM
> > To: digestion at listserv.repp.org
> > Subject: [Digestion] Internal Combustion Engines
> >
> > I would like to know how can I adapt a normal ICE
> (diesel, natural gas,
> > etc)
> > to run with biogas and/or companies which manufactures
> engines for biogas
> > fuel.
> >
> > *If someone can help me, I will appreciate it.*
> >
> > *Regards,*
> > Arturo
> > _______________________________________________
> > Digestion mailing list
> > Digestion at listserv.repp.org
> > http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
> > Beginner's Guide to Biogas
> > http://www.adelaide.edu.au/biogas/
> > http://info.bioenergylists.org
> >
> > _______________________________________________
> > Digestion mailing list
> > Digestion at listserv.repp.org
> > http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
> > Beginner's Guide to Biogas
> > http://www.adelaide.edu.au/biogas/
> > http://info.bioenergylists.org
> >
> _______________________________________________
> Digestion mailing list
> Digestion at listserv.repp.org
> http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
> Beginner's Guide to Biogas
> http://www.adelaide.edu.au/biogas/
> http://info.bioenergylists.org
> 


      


From afal2906 at gmail.com  Fri Jul 31 17:12:45 2009
From: afal2906 at gmail.com (=?ISO-8859-1?Q?Arturo_=C1valos?=)
Date: Fri, 31 Jul 2009 17:12:45 -0500
Subject: [Digestion] Internal Combustion Engines
In-Reply-To: <313754.53102.qm@web62305.mail.re1.yahoo.com>
References: <cb0c3f4e0907310927g14e1a312oc06fae8c5a54fccb@mail.gmail.com>
	<313754.53102.qm@web62305.mail.re1.yahoo.com>
Message-ID: <cb0c3f4e0907311512w79f105ebgb5d56dcfb89d1133@mail.gmail.com>

Thanks, Warren

On Fri, Jul 31, 2009 at 1:48 PM, Warren Weisman <weiswar at yahoo.com> wrote:

>
> Arturo,
>
> Any spark-ignited engine can be run with biogas. It runs just fine, whether
> the biogas is upgraded to biomethane or not. It requires tinkering with the
> air mixture and advancing the timing on a distributor to find the "sweet
> spot" where it fires. Depending on how clean your gas is, the engine may run
> unevenly.
>
> As someone else suggested, a two-stroke engine is a good (and cheap) place
> to start, but I ran a modern four-cycle Honda EU1000 generator with it.
>
> Biogas cannot run in diesel engines without being "admixed" with diesel to
> get it started, as diesels are not spark ignited, they are compression
> ignited. This is inefficient and should be avoided, however, most folks
> running on biogas are far from a diesel source, anyway.
>
> If used for vehicle fuel, the problem will be range, in which case the gas
> will need to be compressed into a practical storage size.
>
> Warren Weisman
> USA
>
> "I say there is no darkness but ignorance." William Shakespeare
>
>
> --- On Fri, 7/31/09, Arturo ?valos <afal2906 at gmail.com> wrote:
>
> > From: Arturo ?valos <afal2906 at gmail.com>
> > Subject: [Digestion] Internal Combustion Engines
> > To: digestion at listserv.repp.org
> > Date: Friday, July 31, 2009, 9:27 AM
> > I would like to know how can I adapt
> > a normal ICE (diesel, natural gas, etc)
> > to run with biogas and/or companies which manufactures
> > engines for biogas
> > fuel.
> >
> > *If someone can help me, I will appreciate it.*
> >
> > *Regards,*
> > Arturo
> > _______________________________________________
> > Digestion mailing list
> > Digestion at listserv.repp.org
> > http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
> > Beginner's Guide to Biogas
> > http://www.adelaide.edu.au/biogas/
> > http://info.bioenergylists.org
> >
>
>
>
>
> _______________________________________________
> Digestion mailing list
> Digestion at listserv.repp.org
> http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
> Beginner's Guide to Biogas
> http://www.adelaide.edu.au/biogas/
> http://info.bioenergylists.org
>



-- 
Arturo

From afal2906 at gmail.com  Fri Jul 31 17:13:07 2009
From: afal2906 at gmail.com (=?ISO-8859-1?Q?Arturo_=C1valos?=)
Date: Fri, 31 Jul 2009 17:13:07 -0500
Subject: [Digestion] Internal Combustion Engines
In-Reply-To: <9a115e610907311138t6433eacbya9cee070027a60c5@mail.gmail.com>
References: <cb0c3f4e0907310927g14e1a312oc06fae8c5a54fccb@mail.gmail.com>
	<33406A7A0DE2FB4F89FB2AAFF4B599EA8CB024@mailserver.HWMA.LOCAL>
	<9a115e610907311138t6433eacbya9cee070027a60c5@mail.gmail.com>
Message-ID: <cb0c3f4e0907311513va7b2705l2a4c3b787de18fe3@mail.gmail.com>

Thanks..

On Fri, Jul 31, 2009 at 1:38 PM, Heffalump <heffalump at gmail.com> wrote:

> Jenbacher and Perkins are two more
>
> Ian Smith
>
> 2009/7/31 Juliette Bohn <jbohn at hwma.net>
>
> > Hello,
> >
> > Manufacturers of engine generators that run on biogas fuel include:
> >  Guascor, Waukesha, Caterpillar and Mann.  There are probably more out
> > there, but this should get you started.
> >
> > -J. Bohn
> >
> >
> >
> >
> >
> > Program Analyst
> > Energy and Waste Management
> > Humboldt Waste Management Authority
> > 1059 W. Hawthorne St.
> > Eureka CA, 95501
> > (707) 268-8680
> > -----Original Message-----
> > From: digestion-bounces at listserv.repp.org [mailto:
> > digestion-bounces at listserv.repp.org] On Behalf Of Arturo ?valos
> > Sent: Friday, July 31, 2009 9:27 AM
> > To: digestion at listserv.repp.org
> > Subject: [Digestion] Internal Combustion Engines
> >
> > I would like to know how can I adapt a normal ICE (diesel, natural gas,
> > etc)
> > to run with biogas and/or companies which manufactures engines for biogas
> > fuel.
> >
> > *If someone can help me, I will appreciate it.*
> >
> > *Regards,*
> > Arturo
> > _______________________________________________
> > Digestion mailing list
> > Digestion at listserv.repp.org
> > http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
> > Beginner's Guide to Biogas
> > http://www.adelaide.edu.au/biogas/
> > http://info.bioenergylists.org
> >
> > _______________________________________________
> > Digestion mailing list
> > Digestion at listserv.repp.org
> > http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
> > Beginner's Guide to Biogas
> > http://www.adelaide.edu.au/biogas/
> > http://info.bioenergylists.org
> >
> _______________________________________________
> Digestion mailing list
> Digestion at listserv.repp.org
> http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
> Beginner's Guide to Biogas
> http://www.adelaide.edu.au/biogas/
> http://info.bioenergylists.org
>



-- 
Arturo

From afal2906 at gmail.com  Fri Jul 31 17:13:56 2009
From: afal2906 at gmail.com (=?ISO-8859-1?Q?Arturo_=C1valos?=)
Date: Fri, 31 Jul 2009 17:13:56 -0500
Subject: [Digestion] Internal Combustion Engines
In-Reply-To: <D779265F4F554B9E84382A1FB5F00348@DFYFT361>
References: <cb0c3f4e0907310927g14e1a312oc06fae8c5a54fccb@mail.gmail.com>
	<D779265F4F554B9E84382A1FB5F00348@DFYFT361>
Message-ID: <cb0c3f4e0907311513y783ce4deq8d4e7dab8e9d6c0c@mail.gmail.com>

Thanks, Robert.

On Fri, Jul 31, 2009 at 12:11 PM, robert carl stout <robertcs at centurytel.net
> wrote:

> some older briggs and stratton engines had adapters to natural gas
> ----- Original Message ----- From: "Arturo ?valos" <afal2906 at gmail.com>
> To: <digestion at listserv.repp.org>
> Sent: Friday, July 31, 2009 11:27 AM
> Subject: [Digestion] Internal Combustion Engines
>
>
>  I would like to know how can I adapt a normal ICE (diesel, natural gas,
>> etc)
>> to run with biogas and/or companies which manufactures engines for biogas
>> fuel.
>>
>> *If someone can help me, I will appreciate it.*
>>
>> *Regards,*
>> Arturo
>> _______________________________________________
>> Digestion mailing list
>> Digestion at listserv.repp.org
>> http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
>> Beginner's Guide to Biogas
>> http://www.adelaide.edu.au/biogas/
>> http://info.bioenergylists.org
>>
>>
>
> _______________________________________________
> Digestion mailing list
> Digestion at listserv.repp.org
> http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
> Beginner's Guide to Biogas
> http://www.adelaide.edu.au/biogas/
> http://info.bioenergylists.org
>



-- 
Arturo

From afal2906 at gmail.com  Fri Jul 31 17:14:24 2009
From: afal2906 at gmail.com (=?ISO-8859-1?Q?Arturo_=C1valos?=)
Date: Fri, 31 Jul 2009 17:14:24 -0500
Subject: [Digestion] Internal Combustion Engines
In-Reply-To: <33406A7A0DE2FB4F89FB2AAFF4B599EA8CB024@mailserver.HWMA.LOCAL>
References: <cb0c3f4e0907310927g14e1a312oc06fae8c5a54fccb@mail.gmail.com>
	<33406A7A0DE2FB4F89FB2AAFF4B599EA8CB024@mailserver.HWMA.LOCAL>
Message-ID: <cb0c3f4e0907311514l19f9d215o71583264e3e429e7@mail.gmail.com>

Thanks, Juliette

On Fri, Jul 31, 2009 at 1:13 PM, Juliette Bohn <jbohn at hwma.net> wrote:

> Hello,
>
> Manufacturers of engine generators that run on biogas fuel include:
>  Guascor, Waukesha, Caterpillar and Mann.  There are probably more out
> there, but this should get you started.
>
> -J. Bohn
>
>
>
>
>
> Program Analyst
> Energy and Waste Management
> Humboldt Waste Management Authority
> 1059 W. Hawthorne St.
> Eureka CA, 95501
> (707) 268-8680
> -----Original Message-----
> From: digestion-bounces at listserv.repp.org [mailto:
> digestion-bounces at listserv.repp.org] On Behalf Of Arturo ?valos
> Sent: Friday, July 31, 2009 9:27 AM
> To: digestion at listserv.repp.org
> Subject: [Digestion] Internal Combustion Engines
>
> I would like to know how can I adapt a normal ICE (diesel, natural gas,
> etc)
> to run with biogas and/or companies which manufactures engines for biogas
> fuel.
>
> *If someone can help me, I will appreciate it.*
>
> *Regards,*
> Arturo
> _______________________________________________
> Digestion mailing list
> Digestion at listserv.repp.org
> http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
> Beginner's Guide to Biogas
> http://www.adelaide.edu.au/biogas/
> http://info.bioenergylists.org
>
> _______________________________________________
> Digestion mailing list
> Digestion at listserv.repp.org
> http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
> Beginner's Guide to Biogas
> http://www.adelaide.edu.au/biogas/
> http://info.bioenergylists.org
>



-- 
Arturo

From joecrescenzi at hotmail.com  Fri Jul 31 17:29:11 2009
From: joecrescenzi at hotmail.com (Joe Crescenzi)
Date: Fri, 31 Jul 2009 15:29:11 -0700
Subject: [Digestion] Internal Combustion Engines
In-Reply-To: <cb0c3f4e0907311513y783ce4deq8d4e7dab8e9d6c0c@mail.gmail.com>
References: <cb0c3f4e0907310927g14e1a312oc06fae8c5a54fccb@mail.gmail.com>
	<D779265F4F554B9E84382A1FB5F00348@DFYFT361> 
	<cb0c3f4e0907311513y783ce4deq8d4e7dab8e9d6c0c@mail.gmail.com>
Message-ID: <BLU142-W2094DED41060D8DE34DF1ED3100@phx.gbl>



 
> Date: Fri, 31 Jul 2009 17:13:56 -0500
> From: afal2906 at gmail.com
> To: robertcs at centurytel.net; digestion at listserv.repp.org
> Subject: Re: [Digestion] Internal Combustion Engines
> 
> Thanks, Robert.
> 
> On Fri, Jul 31, 2009 at 12:11 PM, robert carl stout <robertcs at centurytel.net
> > wrote:
> 
> > some older briggs and stratton engines had adapters to natural gas
> > ----- Original Message ----- From: "Arturo ?valos" <afal2906 at gmail.com>
> > To: <digestion at listserv.repp.org>
> > Sent: Friday, July 31, 2009 11:27 AM
> > Subject: [Digestion] Internal Combustion Engines
> >
> >
> > I would like to know how can I adapt a normal ICE (diesel, natural gas,
> >> etc)
> >> to run with biogas and/or companies which manufactures engines for biogas
> >> fuel.
> >>
> >> *If someone can help me, I will appreciate it.*
> >>
> >> *Regards,*
> >> Arturo
> >> _______________________________________________
> >> Digestion mailing list
> >> Digestion at listserv.repp.org
> >> http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
> >> Beginner's Guide to Biogas
> >> http://www.adelaide.edu.au/biogas/
> >> http://info.bioenergylists.org
> >>
> >>
> >
> > _______________________________________________
> > Digestion mailing list
> > Digestion at listserv.repp.org
> > http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
> > Beginner's Guide to Biogas
> > http://www.adelaide.edu.au/biogas/
> > http://info.bioenergylists.org
> >
> 
> 
> 
> -- 
> Arturo
> _______________________________________________
> Digestion mailing list
> Digestion at listserv.repp.org
> http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
> Beginner's Guide to Biogas
> http://www.adelaide.edu.au/biogas/
> http://info.bioenergylists.org

_________________________________________________________________
Windows Live? Hotmail?: Celebrate the moment with your favorite sports pics. Check it out.
http://www.windowslive.com/Online/Hotmail/Campaign/QuickAdd?ocid=TXT_TAGLM_WL_QA_HM_sports_photos_072009&cat=sports

From bingham at zekes.com  Fri Jul 31 18:47:39 2009
From: bingham at zekes.com (bingham)
Date: Fri, 31 Jul 2009 16:47:39 -0700
Subject: [Digestion] Internal Combustion Engines
References: <cb0c3f4e0907310927g14e1a312oc06fae8c5a54fccb@mail.gmail.com>
Message-ID: <DDB0F4E02B614CD6A288AF74F72BA2E2@Portable>

Connect the filtered biogas line into the air intake system of almost any 
Diesel engine. Use a valve you can adjust easily before the air intake.
Start the Diesel as normal, gradually open the biogas valve. The Governor in 
the Diesel will automatically start cutting back the amount of
diesel the injection pump is sending to the running engine. We never run to 
much biogas because the Diesel is top lubricated by the Diesel
fuel. We have done this on almost all brands of diesels used fore stationary 
pumps and generators with good results.
Brent

----- Original Message ----- 
From: "Arturo ?valos" <afal2906 at gmail.com>
To: <digestion at listserv.repp.org>
Sent: Friday, July 31, 2009 9:27 AM
Subject: [Digestion] Internal Combustion Engines


>I would like to know how can I adapt a normal ICE (diesel, natural gas, 
>etc)
> to run with biogas and/or companies which manufactures engines for biogas
> fuel.
>
> *If someone can help me, I will appreciate it.*
>
> *Regards,*
> Arturo
> _______________________________________________
> Digestion mailing list
> Digestion at listserv.repp.org
> http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
> Beginner's Guide to Biogas
> http://www.adelaide.edu.au/biogas/
> http://info.bioenergylists.org
> 


From afal2906 at gmail.com  Fri Jul 31 19:14:16 2009
From: afal2906 at gmail.com (=?ISO-8859-1?Q?Arturo_=C1valos?=)
Date: Fri, 31 Jul 2009 19:14:16 -0500
Subject: [Digestion] Internal Combustion Engines
In-Reply-To: <DDB0F4E02B614CD6A288AF74F72BA2E2@Portable>
References: <cb0c3f4e0907310927g14e1a312oc06fae8c5a54fccb@mail.gmail.com>
	<DDB0F4E02B614CD6A288AF74F72BA2E2@Portable>
Message-ID: <cb0c3f4e0907311714i74e04c12qaefcb677cc329c9f@mail.gmail.com>

Thanks, Brent

On Fri, Jul 31, 2009 at 6:47 PM, bingham <bingham at zekes.com> wrote:

> Connect the filtered biogas line into the air intake system of almost any
> Diesel engine. Use a valve you can adjust easily before the air intake.
> Start the Diesel as normal, gradually open the biogas valve. The Governor
> in the Diesel will automatically start cutting back the amount of
> diesel the injection pump is sending to the running engine. We never run to
> much biogas because the Diesel is top lubricated by the Diesel
> fuel. We have done this on almost all brands of diesels used fore
> stationary pumps and generators with good results.
> Brent
>
> ----- Original Message ----- From: "Arturo ?valos" <afal2906 at gmail.com>
> To: <digestion at listserv.repp.org>
> Sent: Friday, July 31, 2009 9:27 AM
> Subject: [Digestion] Internal Combustion Engines
>
>
>  I would like to know how can I adapt a normal ICE (diesel, natural gas,
>> etc)
>> to run with biogas and/or companies which manufactures engines for biogas
>> fuel.
>>
>> *If someone can help me, I will appreciate it.*
>>
>> *Regards,*
>> Arturo
>> _______________________________________________
>> Digestion mailing list
>> Digestion at listserv.repp.org
>> http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
>> Beginner's Guide to Biogas
>> http://www.adelaide.edu.au/biogas/
>> http://info.bioenergylists.org
>>
>>
> _______________________________________________
> Digestion mailing list
> Digestion at listserv.repp.org
> http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
> Beginner's Guide to Biogas
> http://www.adelaide.edu.au/biogas/
> http://info.bioenergylists.org
>



-- 
Arturo

From david at h4c.org  Fri Jul 31 21:25:49 2009
From: david at h4c.org (David)
Date: Fri, 31 Jul 2009 19:25:49 -0700
Subject: [Digestion] H2S filtering
In-Reply-To: <4A5FD795.2020000@h4c.org>
References: <009301ca0643$b1988a20$14c99e60$@avalos@avaloninmobiliaria.com.mx>
	<4A5FB798.3080907@h4c.org> <4A5FD795.2020000@h4c.org>
Message-ID: <4A73A7AD.9030506@h4c.org>



Friends,

With further regard to our [several] previous discussions regarding 
removing H_2 S from biogas, I thought a mention of the following might 
be of interest:

Removal of Hydrogen Sulfide from Biogas Using Cow-Manure Compost: 
http://www.cowpower.cornell.edu/project_docs/MS-Thesis-Steve-Zicari.pdf




d.
-- 
David William House
"The Complete Biogas Handbook" |www.completebiogas.com|
/Vahid Biogas/, an alternative energy consultancy |www.vahidbiogas.com

|
"Make no search for water.       But find thirst,
And water from the very ground will burst."
(Rumi, a Persian mystic poet, quoted in /Delight of Hearts/, p. 77)

http://bahai.us/


From kapehankel at gmx.de  Fri Jul 31 23:43:29 2009
From: kapehankel at gmx.de (klauspeter Hankel)
Date: Sat, 01 Aug 2009 06:43:29 +0200
Subject: [Digestion] internal combustion engines
Message-ID: <20090801044329.18370@gmx.net>

try also:

http://www.schnellmotor.de/sm/en/index.php
-- 
Klaus Peter Hankel
Mumbai, India

tel     +91 96 19 43 45 93
email kapehankel at gmx.de