Dear Wishwanathan, we are still working on the idea. It works. We have been able to reduce the size of the digester to 1/3. Charcoal has to be enclosed in a net bag. It does float in the initial stages, but later it absorbs water and becomes heavy and sinks. Yours A.D.Karve
On Thu, Oct 6, 2011 at 10:30 AM, Viswanathan KS <[email protected]> wrote: > Dear Dr Karveji > Your designed digestor for kitchen waste has been popular. Can this digestor > be made smaller and therefore cheaper and more affordable for households, if > it is filled with charcoal? > Charcoal of which size is used and the quantity to be used? > Will charcoal not tend to float in the digestor? > > > On Wed, Oct 5, 2011 at 9:22 AM, Anand Karve <[email protected]> wrote: >> >> Dear Henry, >> There are a lot of very simple ideas that need to be tested. I am >> currently working on increasing the efficiency of biogas digesters and >> feel that it might be possible to reduce the size and the capital >> expense of a biogas system. For instance, when I filled the digester >> with charcoal, my system accepted three times the normal daily input >> and produced three times as much gas. >> How much electrical energy would be required by the electric arc to >> produce producer gas? One can perhaps achieve the same temperature >> with paraboloid mirrors and sunlight. >> Yours >> A.D.Karve >> >> On Mon, Sep 12, 2011 at 5:52 AM, Energy7 <[email protected]> wrote: >> > Hi All >> > I Hope this is not a double post ( I posted this from my I phone earlier >> > this morning and it has yet to show up )... >> > >> > Dear A.D. Karve >> > My exact thought a while ago was to achieve this temperature with an >> > internal electric arc furnace. The resulting gas can be put thru a >> > catalyst. >> > Just lately was reminded by a colleague of the efficiency of electro >> > static >> > precipitators and am presently researching their compatibility with >> > producer >> > gas. >> > So : air tight electric arc furnace fed with co2 and preheated feed >> > stock> >> > catalyst>98%cyclone cleaning>precip> final water filter cooling >dryer > >> > co2 >> > removal > o2 injection >ice>recycle hot co2 exhaust to preheat feed >> > stock. >> > Just an idea.. maybe too complicated? Please send me your ideas. >> > HN >> > ----- Original Message ----- From: "Anand Karve" <[email protected]> >> > To: "Discussion of biomass pyrolysis and gasification" >> > <[email protected]> >> > Sent: Saturday, September 10, 2011 11:41 PM >> > Subject: [Gasification] reducing temp. of gasification >> > >> > >> >> Dear All, >> >> one requires about 700C temperature for making producer gas. This is >> >> generally achieved by burning the feedstock itself, for which one >> >> introduces external air into the reactor. As a result, the producer >> >> gas gets diluted by the nitrogen in the air. If the process can be >> >> conducted in a closed vessel, which is heated from the outside, one >> >> can get combustible gas without all the nitrogen, but heating the >> >> feedstock inside a container cannot achieve the temperature that is >> >> required for producing producer gas, so that what one gets is >> >> primarily tar vapour. Has anyone thought of using a catalyst for >> >> getting pyrolysis gas at say 300 C? It would help me greatly, if such >> >> a catalyst were available. >> >> Yours >> >> A.D.Karve >> >> >> >> _______________________________________________ >> >> 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/ >> > >> >> >> >> -- >> *** >> Dr. A.D. Karve >> Trustee & Founder President, Appropriate Rural Technology Institute (ARTI) >> >> _______________________________________________ >> 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/ > > -- *** Dr. A.D. Karve Trustee & Founder President, Appropriate Rural Technology Institute (ARTI) _______________________________________________ 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/
