[Digestion] Digestion Digest, Vol 5, Issue 9

[finstein at envsci.rutgers.edu]

Good "seeing" you too, Duncan.

Well, I don't know if "laws of nature" are at play here. The rest of my
response elaborates on Part 3 of the Critique noted in my original comment
to the listserv community.

It is that owing to its prolonged SRT, the UASB configuration induces the
development of granualar consortia in which syntropic populations are in
close proximity. (See especially: Speece et. al. 2006. Water Environment
Research, Vol. 78, No. 5.) This form of microbial self-organization
enhances speed and completeness in transforming organic matter to methane
and other end products.

But don't get me wrong. I am NOT suggesting this is the be-all and end-all
of practical anaerobic digestion. On the contrary, UASB is applicable only
to a highly industrial setting. I happen to be engaged in such a setting.

My original comment remains true (I believe). This was that High Solids
and High Rate are mutually exclusive.

Regards to you, Duncan, and to the rest of the community.

Mel


Melvin S. Finstein, Ph.D.
Emeritus Professor of Environmental Science
 Rutgers, The State University of New Jersey
Head, ArrowBio USA

105 Carmel Road
Wheeling, WV 26003
(304) 242-0341
Email: finstein at envsci.rutgers.edu
Skype: melvinfinstein


> Good to hear from you again Mel - but I have a question for you....
>
> WHY are "High Solids and High Rates mutually exclusive"
>
> Is that a law of nature or just an artefact of how we've been doing things
> up to now?
>
> Clearly, the highest rates will be obtained with 100% soluble substrates,
> which are inherently incompatible with very high solids concns.
>
> However, for the SAME substrate, I am not convinced.
>
> Best regards
>
> Duncan J Martin
>
> Chair
> Republic of Ireland Centre
> Chartered Institution of Wastes Management,
>
> ================================
> CONTACT DETAILS
> Duncan J Martin, PhD, CEng, CSci, MIEI, MCIWM, MIChemE
> 24 Townsfield, Cloughjordan, N Tipperary, Ireland
> Mobile: +353 86 8377 906
> Email: duncanjmartin at eircom.net
> ================================
>
>
>
>
>
>
> ----- Original Message -----
> From: <finstein at envsci.rutgers.edu>
> To: <digestion at listserv.repp.org>
> Cc: <stuart at oaktech-environmental.com>
> Sent: Saturday, November 11, 2006 6:45 PM
> Subject: Re: [Digestion] Digestion Digest, Vol 5, Issue 9
>
>
> Greetings to all subscribers,
>
> Regarding "high solids content" digestors alluded to below, please note
> that in fact High Solids and High Rates are mutually exclusive. The point
> is thoroughly explored elsewhere: <www.oaktech-environmental.com> click on
> "news & events", then click on the item dated 29 January 2006 - see
> especially Part 3.
>
> The posted abstract on the Oaktech website reads:
>
> "ArrowBio USA Represented by Professor Melvin Finstein submitted his
> response to the URS Reports on future waste technologies for Los Angeles.
> Mel's response is critical to a report that bundles all anaerobic
> digestion systems into the same category and discounts the clear benefits
> of advanced anaerobic digestion."
>
> It might be noted that ArrowBio is a semi-finalist contender in Los
> Angeles County and elsewhere. Much background material is given in the 29
> January 2006 "Critique."
>
> Regards to all,
>
> Mel Finstein
>
>
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>> Today's Topics:
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>>    1. high rate digester (AKBAR SHABANI)
>>    2. Re: high rate digester (Bjorn Dahlroth)
>>
>>
>> ----------------------------------------------------------------------
>>
>> Message: 1
>> Date: Fri, 10 Nov 2006 21:05:27 -0800 (PST)
>> From: AKBAR SHABANI <a_shabanikia at yahoo.com>
>> Subject: [Digestion] high rate digester
>> To: "ÔÈ~å È&#1740,æÇÒ&#1740," <digestion at listserv.repp.org>
>> Message-ID: <20061111050527.66358.qmail at web52208.mail.yahoo.com>
>> Content-Type: text/plain; charset=iso-8859-1
>>
>> dear hi   I want to make digesteres  for biogas production from high
>> concenterate matterial  with totale solides about 20-40 %.if it possible
>> please help me
>>
>>   with thank
>>   A - SHABANIKIA
>
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