Hello Marc
snip
Aerobic composting produces a (very) useful
product, the compost, with the heat essentially a by-product, often a
waste-product (very under-utilized); anaerobic digestion primarily
produces energy, the biogas, and a resultant sludge that isn't useful
and is difficult to handle.
- Original Message -
From: Marc de Piolenc [EMAIL PROTECTED]
To: Biofuel List biofuel@yahoogroups.com
Sent: Wednesday, September 18, 2002 02:46
Subject: [biofuel] Biogas Digester
Recently, there have been addenda to the anaerobic digestion schemes
involving an aerobic
I found a web site that discusses an aerobic/anaerobic
biodigester. They claim that what is left after the methane
is removed is so clean that the effluent can be used as a
complete hydroponics solution or as a conventional organic
fertilizer. http://www.hydor.eng.br/Pag21-1.html
--- Keith
Sirs,
It may not be feasible to simultaneously utilise the heat of composting and the
methane.
Composting is an AEROBIC process while methane production is ANAEROBIC.
Different groups of bacteria which are entirely different are resposible for
the processes.
No utilisable heat is evolved in
hello Marc
Keith wrote:
But piggeries and chicken yards are best part of a mixed farm, not
standalones. In Hong Kong's rural areas the guvmint, being a guvmint,
and very much subject to Chris's Leviathan's First Rule, decided
specializing was best. Previously the peasant system was mixed, like
Kris Book wrote:
I found a web site that discusses an aerobic/anaerobic
biodigester. They claim that what is left after the methane
is removed is so clean that the effluent can be used as a
complete hydroponics solution or as a conventional organic
fertilizer.
- Original Message -
From: Keith Addison [EMAIL PROTECTED]
To: biofuel@yahoogroups.com
Sent: Wednesday, September 18, 2002 00:21
Subject: Re: [biofuel] Biogas Digester
Whatever one might think of Chairperson Mao, his Seven Characters,
rules for agriculture, were pretty good. One
Sirs,
It may not be feasible to simultaneously utilise the heat of
composting and the methane.
Composting is an AEROBIC process while methane production is ANAEROBIC.
Different groups of bacteria which are entirely different are
resposible for the processes.
No utilisable heat is evolved in
Read interesting article in Permaculture Magazine no.30 about Jean Pain and
his work with shredded woodland thinnings.
A search on the net turned up this
http://lists.ibiblio.org/pipermail/permaculture/2002-March/000294.html which
summerizes(follow the threads for more) .
Sorry if this has