Dear Crispin, the biogas plant filled with charcoal accepted three times the normal quantity of feedstock and also produced daily three times as much biogas. It did this for about three months, after which it suddenly stopped producing any biogas. We tried giving it a rest for a view weeks, but it did not recover. We reduced the feedstock quantity back to 1g per litre, but it did not produce any biogas. Three g per litre of digester capacity represent overfeeding under normal circumstances. As long as the charcoal in the biogas plant was active, the plant could accept the high dose of the feedstock. But at some point of time, the charcoal became inactive and without realising it, we kept feeding the system with three times the allowable quantity of feedstock. I think that the pH of the substrate became acidic, causing the biogas production to stop. Yours A.D.Karve
On Fri, Mar 22, 2013 at 8:27 AM, Crispin Pemberton-Pigott <[email protected]> wrote: > Dear AD > > I too have a question: did the addition of 3g/litre still yield 3kg of gas > per kg of input? That leads to the question, was the gas production rate > dropping so you reduced the feed loading from 3 g to 2 g then 1 g, or was > the gas production rate dropping? > > Thanks > Crispin > > > Dear Anand, > What was the particle size of the char that you added to achieve this > effect? Have you tried different sizes? > > Thanks, > Alex > > > > _______________________________________________ > Stoves mailing list > > to Send a Message to the list, use the email address > [email protected] > > to UNSUBSCRIBE or Change your List Settings use the web page > http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org > > for more Biomass Cooking Stoves, News and Information see our web site: > http://www.bioenergylists.org/ > -- *** Dr. A.D. Karve Trustee & Founder President, Appropriate Rural Technology Institute (ARTI) _______________________________________________ Stoves mailing list to Send a Message to the list, use the email address [email protected] to UNSUBSCRIBE or Change your List Settings use the web page http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org for more Biomass Cooking Stoves, News and Information see our web site: http://www.bioenergylists.org/
