Hi All, We were surprised when we burned dung and found that it seemed to be a pretty good fuel, even relatively clean.
Check out: http://bioenergylists.org/stovesdoc/apro/dung/Aprodung.htm Dean On Tue, Feb 12, 2013 at 7:26 PM, Kevin <[email protected]> wrote: > ** > Dear Ron > > ----- Original Message ----- > *From:* [email protected] > *To:* Discussion of biomass cooking stoves<[email protected]> > *Cc:* Kaji Sanu <[email protected]> ; Kavita Mary and > Francis<[email protected]> > *Sent:* Tuesday, February 12, 2013 8:17 PM > *Subject:* Re: [Stoves] Energy content cow dung > > List, Richard, etal > > I started this note off thinking I would try to prove that dung should > not be used for cooking at all. In googling, I found nothing (repeat > nothing) good to be said about using dung for cooking - except that it was > sometimes necessary because there was nothing else. The alternative of > course is the tremendous value of dung to improve soils. My guess is > that almost everywhere, that something can/should be planted for long term > alternative fuel supply not using dung. > > *# About 6 years ago, I introduced the concept of "Washing Dung." The > idea was to simply slurry the dung with water, and "filter off the 'wash > water." This can be done very easily. I forsee major benefits as follows:* > *1: The washing would remove the soluble salts, including chlorides, , > and as such would virtually eliminate the potential for dioxin formation.* > *2: Soluble nitrates, proteins, hormones and micro-nutrients would be > removed in forms that were most available to plants. * > *3: Salts interfere with combustion, and their removal would permit > better combustion of the filter cake.* > *4: Since the animals have digested the cellulostic fractions of the feed > and rejected the lignin fraction to the manure, the filter cake would have > a higher heating value per pound than wood or the original feed materials. > * > ** > *The "Wash Water" would be a "Manure Tea", and as such, would be an > excellent fertilizer. The filter cake could be briquetted and * > *a: Be used as a much easier burning and very much safer fuel* > *or * > *b: The filter cake could be charred, where the char was more valuable to > the user than the fuel value. * > ** > > We have had recent discussion of Jatropha seeds for instance. > > But after looking at a lot of web material, an Australian site popped > up for improved cooking using a TLUD with dung. Many years ago I tried > using dung in Ethiopia with a TLUD and had zero success - so I was > impressed. The site is > > https://www.engineeringforchange.org/news/2011/10/09/cooking_in_adelaide_with_experimental_dung_burning_stoves.html > *# The washed dung, if briquetted and crumbled, to give void space, could > turn out to be a very good fuel for a TLUD stove.* > > It probably is necessary to only view what they call Blog #4, but there > are three earlier - some showing the conversion of the dung into a fuel > shape. I could not tell from blog #4 what their eventual fuel shape was, > but maybe "cubes" of 4-5 cm size, if their starter material was typical. > I doubt that it was in the form of "patties" I liked all I could tell > about their TLUD, but think it could perhaps be improved with primary air > control. > > The saved char certainly has more value for soil improvement than the > ash, if ash from typical non-TLUD stoves is ever saved/used. > > *# The major advantage of "Dung Washing" is that all the leached > nutrients are in a form that is more readily available to plants than they > would be after burning.* > > But it is not clear to me that their input dung wouldn't have been better > used for composting with wood char being used (from the beginning - not > added) with the raw dung. > > *# As I understand it, wood is the preferred fuel, and dung is only used > as a fuel when wood is unavailable or unaffordable. * > > Not sure but there seemed to be enough efficiency improvement with the > TLUD over the three stone, that they need not use more dung - and can still > retain a good bit of the dung's soil-nutritional value. > > *# with dung washing, most of the nutritional benefits of manure would > probably report to the wash water.* > > In this note I am trying to emphasize using dung to replace fertilizer - > a topic I know little about, except I couldn't find a single place where > dung use is recommended for cooking. > > *# Anyone who has made "Manure Tea" would likely confirm its benefits as > an organic fertilizer. > > * Contacting these clever Australian students would probably lead now to > even more information on the dung-stove-soil nutrition topic. > > *# Perhaps they would be interested in dung washing, and developing a > stove that burned teh filter cake. By virtually eliminating teh dioxins in > teh smoke from an "unwashed dung fire", tehy would be bringing a great > health benefit to the "Washed Dung stove users."* > > Best wishes, > > Kevin > > Ron > > ------------------------------ > *From: *"Richard Stanley" <[email protected]> > *To: *"Discussion of biomass cooking stoves" < > [email protected]> > *Cc: *"Kaji Sanu" <[email protected]>, "Kavita Mary and Francis" < > [email protected]> > *Sent: *Tuesday, February 12, 2013 2:37:52 PM > *Subject: *Re: [Stoves] Energy content cow dung > > Dear Sarabagya, > > I have ccy'd your request to our good friends, and briquette trainers' > researchers, Mary and Francis Kavita who are based in Kenya. They have > trained Masaai in making nice smelling, clean burring dung blend fuel > briquettes ot in Masaailand a couple of years ago. ( They have also > developed similar blends for elephant dung blends in same and neighboring > regions in Kenya. > > I also ccy it to Sanu Kaji of the Foundation for Sustainable Technologies > (FoST) in Thamel /Kathmandu as he is the resident expert in briquette > making there in you country (…and probably regionally as well). Finally > wanted to touch base also with Mzee Bob out there in Northern Masaailand, > it may also be useful to you as well in that you are looking at dung > burning now. As a replacement for wood (which was probably far more > obtainable when you began your work there), it made little sense to go to > the trouble to making briquettes-- but now ?? > > I'd trust Mary and Francis skills implicitly: We trained then in 2001 and > they have been all over the nation and region in fact, training others on > their own steam under their own business since that time. We had some > camel dung blends they made, tested at the Kenya Industrial Research& > Development Institute (KIRDI) for a potential project up in Somaliland a > couple of years ago. > > All the best (ukinaweza saida huyu jamaa, Francis, ilikua mzuri , asante > sana) > > Richard Stanley(mzee pia) > www.legacyfound.org > > > > > This may or may not be useful to you buOn Feb 11, 2013, at 6:49 AM, > Sarbagya Tuladhar wrote: > > Hi Bob, > > Really interesting on the work regarding the Maasai stove for cow dung. > Can you provide me more information on the stove ? Dung burning for fuel is > a major problem here in South Nepal and we are exploring on ways to combat > them. > > Cheers > > Sarbagya Tuladhar > Nepal > > Sent from my iPhone > > On 11/02/2013, at 12:13 AM, [email protected] wrote: > > > Some of the Maasai burn cow dung in their three stone fires and now burn > it in our stove and report it is okay and they use less just like the wood > burning folks. I want to do some analysis and need a reasonable estimate > of energy per mass of some average dung. Googling I got about 75% of the > energy density in hard wood fuel. Please send me info or sources on this. > Don't need to bore the whole list so use my email. Thanks > > Bob. Maasai Stoves and Solar. > > Sent from my BlackBerry® smartphone provided by Airtel Tanzania. > > _______________________________________________ > > 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/ > > > > _______________________________________________ > 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/ > > > > _______________________________________________ > 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/ > > ------------------------------ > > _______________________________________________ > 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/ > > > _______________________________________________ > 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/ > > >
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