[permaculture] Biogas digester plans
ScottH at wcig.org.au
Mon Mar 4 17:34:37 EST 2002
I've seen detailed plans somewhere on the net: I'll try and dig them up. Be aware that these digesters also produce a fair amount of sulphuric acid vapour, which would place some limitations on equipment and fittings used. Apparently, the acid can be reduced / removed by passing the gas through bottles of steel wool or similar iron waste. This gradually turns white, not rusted /oxidised. It can be re-used by exposing it to their until it does oxidise.
scotth at wcig.org.au
From: Mark [mailto:mpludwig at facstaff.wisc.edu]
Sent: Tuesday, 5 March 2002 9:17 AM
To: permaculture at lists.ibiblio.org
Subject: Re: [permaculture] Biogas digester plans
Have seen plans from the 70's using two cylindrical tanks, the smaller
nested and floating in the larger. A pipe thread is tapped in the top of
the rig and enough pressure is generated by the weight of the tank for
cooking gas. Of course one would want some kind of flame arrestor in the
line to avoid unintended pyrotechnics. Perhaps two units would be better
to allow one to work more fully while the other filled? The other models
I've seen use rubber or plastic bladders.
At 10:51 AM 3/4/02 -0800, you wrote:
>Is anyone familiar with homescale methane production via compostables and
>humanure? We are looking to install one for a site with upwards of 10
>people per day as well as clippings etc.
>P.O. Box 87
>Roberts Creek, B.C.
>"The Nazgul are in the Shire, moving among our friends
>permaculture mailing list
>permaculture at lists.ibiblio.org
Mark P. Ludwig
Poultry Research Lab
University of Wisconsin -Madison
permaculture mailing list
permaculture at lists.ibiblio.org
More information about the permaculture