Not sure what is involved in methane, other than filling a tank with manure and water and waiting (with nose plugs<grin> ) - but on a small scale I wonder what kind of volumes of methane are produced.
If you take a typical small 5 kw generator (10hp engine) and figure it has a cylinder volume around 400cc and it is turning 3600 rpm you would be looking at .4lt * 1800=720 litres/minute or about 25.4 cfm of gas. Even if you mix it 10:1 with air, you are using 2.5 cfm of methane, 150 cubic feet per hour. How many minutes will a small digester run that engine? (or how big does the digester have to be to keep the engine running as long as you want it.) Flaring a small digester may be impressive, but what is the actual volume of gas it provides? With wood gasification you can "create" your fuel as fast as you need it simply by sizing the gasifier to match your engine and pouring in more wood chips or pellets. Suggest spending a few weeks reading through the back postings here, on yahoo woodgas group and look at drive on wood (although that may be a pay site). You'll soon figure out who knows what they are talking about, and you can follow some of them back to their web sites for more info. David <been lurking a while> Meed On Wed, Apr 1, 2015 at 6:20 PM, hugh <[email protected]> wrote: > Just joined .. and have been interested in gas from wood pyrolysisfor quite > a while - but also in methane from bio-digestion (small scale) .. and > haven't been able to find a suitable group > > Does anybody have some suggestions? > > Cheers > > Hugh > > (Dr) Hugh Spencer > Australian Tropical Research Foundation > Cape Tribulation Tropical Research Station > PMB 5 Cape Tribulation Qld. > > _______________________________________________ > Gasification 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/gasification_lists.bioenergylists.org > > for more Gasifiers, News and Information see our web site: > http://gasifiers.bioenergylists.org/ _______________________________________________ Gasification 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/gasification_lists.bioenergylists.org for more Gasifiers, News and Information see our web site: http://gasifiers.bioenergylists.org/
