[Stoves] Biodigester construction in Bolivia (Video)

Sun Jan 20 18:14:47 CST 2008

Dear Mr. Jaime Marti Herrero,
I too have read about the digester made from a relatively thin plastic tube
and am in fact enamoured with the idea. We use feedstock biodegradable solid
waste that a city generates. It consists of fruit and vegetable market waste
and waste food from restaurants and households. 1 kg dry weight of such
substances would generate about 800 litres of biogas containing about 60%
methane. The methane would weigh about 250 to 300 g and be sufficient to
cook two meals for a family of 4 to 5 persons. The relatively thin, plastic
tube digester is an ingeneous idea, because the
size and shape of such a digester can be decided according to the
availability
of space. Our digester has a volume of only 1000 litres, but it consists of
a rigid plastic water tank which does not allow any
compromise. Its diameter is 120 cm. It won't even go
through the door of a city dwelling and it requires at least 3.5 to 4 square
meters of floor area, which is often difficult to find in a modern apartment
house. We generally install it on the terrace of a house or on the ground
outside the kitchen. People want a biogas plant that would fit in the
balcony of their
apartments. Most balconies have a width of less than 1 meter. With the thin
plastic tube digester, it might be possible to give people what they want.
Yours
A.D.Karve
----- Original Message -----
From: Jaime Marti Herrero <tallerbiogas at hotmail.com>
To: <stoves at listserv.repp.org>; <tmiles at trmiles.com>
Sent: Thursday, January 17, 2008 3:12 AM
Subject: Re: [Stoves] Biodigester construction in Bolivia (Video)

Hi Richard.
I knew about these tipe of compact biodigester a few months ago. It looks
very interesting for urban areas and semiurban areas.
about if the ARTi one looks 'light years ahead of the cow digester' could be
true as good looking, but for us the important issue are the rural families
that have different requirements than urban o semiurban ones.

For example, we work some times at isolated areas (no road) and you need to

transport the material on the back of the people or with mules. So a compact
biodigester will be more difficult to transport.
We want biodigesters made with materials that anyone could buy in bolivia,
in any market,  so anyone can build his own biodigester.
We use tubular biodigester because the families want to use the efluent as
fertilizer. If you use compacts tanks, you dont know for how long have been
the efluent inside the digester. A tubular biodigester insurance that the
effluent has been long time inside and has been digest.
About the guide design and manual installation document will be free because
there are lots of information about these tipe of tubular biodigesters, free
information, and this document is trying to put together the theorical and
practical part with the experience of this years in Bolivia. So there no new
invention, just only has been the developments of the works of other people
(Botero, Preston, Rodriguez, Aguilar, Harris...) to adapt it to Bolivia and
the altiplano.

For urban families, the AD solution looks great, as well for rural families
with no interest in the fertilizer. But for rural families looks like the
tubular polietilene biodigester looks more appropriate technology. so i
think that both biodigesters design are good, but with different objectives.

keep in contact
Jaime Marti Herrero
GTZ-PROAGRO (Bolivia)

> From: tmiles at trmiles.com
> To: tallerbiogas at hotmail.com
> Subject: FW: [Stoves] Biodigester construction in Bolivia (Video)
> Date: Wed, 16 Jan 2008 10:42:40 -0800
>
> Jaime,
>
> The message below was posted to the stoves list. I have been forwarding
your
> digestion messages to the Stoves list. You can reply to
> stoves at listserv.repp.org and it will go to the list. I have added you to
the
> list so that you can see the replies and suggestions. There are about 600
> people on the stoves list from around the world including GTZ folks.
>
> Tom
>
>
>
> > -----Original Message-----
> > From: stoves-bounces at listserv.repp.org [mailto:stoves-
> > bounces at listserv.repp.org] On Behalf Of Richard Stanley
> > Sent: Wednesday, January 16, 2008 9:50 AM
> > To: Discussion of biomass cooking stoves
> > Subject: Re: [Stoves] Biodigester construction in Bolivia (Video)
> >
> > Jaime,
> >
> > Have you seen or heard about the ARTI compact biodigester which has
> > been developed by Dr. AD Karve based in Pune India ?
> > Better take a look as it is light years ahead of the cow digester
> > design The blend of your experience particularly at elevations and in
> > conserving heat might be a great addition to what AD is doing. None
> > of us is as smart as all of us. I would also recommend that once you
> > have blended the information, you sell your training materials for
> > it, just as AD does and we do for our own biomass briquetting
> > information --online through Pay Pal or equivalent (free, also
> > online) financial transaction management mechanism.
> > AD is and active member of this group so my provision of his email
> > contact may be redundant but here goes anyway:
> > adkarve at pn2.vsnl.net.in   He has a very informative video attached to
> > his website:  < http://www.arti-india.org/content/view/45/52/ >
> >
> > We will be installing such a compact unit (which we will need to
> > insulate for our own winter )when our remodel is completed this May.
> >   I will be first in line to buy your and AD's manual's at that time.
> >
> > Best of luck,
> >
> > Richard Stanley
> > www.legacyfound.org
> >
> >
> > _______________________________________________
> > Stoves mailing list
> > Stoves at listserv.repp.org
> > http://listserv.repp.org/mailman/listinfo/stoves_listserv.repp.org
> > http://stoves.bioenergylists.org
> > http://info.bioenergylists.org
>
>

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