[Stoves] Spherical Cow Dung Balls for ND-TLUDs in Bangladesh : Dung is very do-able

Richard Stanley rstanley at mind.net
Fri Nov 2 17:07:44 CDT 2018


HI Julian, 
Colleagues of ours in our biomass briquetting world  have worked with Masaai in East Afica in finding ways to optimise the energy content of cow dung. A one Francis and MAry Kavita from rural Kenya came up with the idea of soaking the dung in water, then straining off the fiber (lignin) content in a simple local wicker basket (much the way villages more or less globally, wash their grains fromr time immemorial. The liquid expellate is a rich valuable organic liquid fertilizer. The fiber remaining can then be mixed with sawdust or leaves or other combustibles including, waste paper, and or pulverised charcoal crumbs from the last fire, to produce a very clean burning fuel.  
Hope this helps a bit. If you do get into it please pass on your experience to the rest of us as you proceed.  

Richard Stanley
www.legacyfound.org
 
> On Nov 2, 2018, at 8:37 AM, Julien Winter <winter.julien at gmail.com> wrote:
> 
> Hi all;
> 
> I have suggested to Mahbubul (my colleague in Bangladesh) that cow dung may be used as a binder for material that is compressed or forced through an extruder.  That would increase the energy density of the fuel and increase the run-time of a batch loaded TLUD.
> 
> There is a recent paper that used cow dung as a binder for fire bricks.  
> Khurshid, I; Ahmad, S; Nawaz, R; Arshad, M; Dar, MEUI; Imran, M; Aslam, F; Nasir, R; Shah, GM; Ahmad, N; Naeem, MA.  2018.  Development of fire bricks from organic waste: an eco-friendly energy solution.  Applied Ecology and Environmental Research  16: 3919-3932  DOI: 10.15666/aeer/1604_39193932 
> http://www.aloki.hu/pdf/1604_39193932.pdf <http://www.aloki.hu/pdf/1604_39193932.pdf>
> 
> Not all cow dung is the same, and cow dung (fluid) from a large herd of confined dairy cattle would be different from dung (balls) from cattle grazing rough cellulosic vegetation.  Dung from dairy farms could likely include urine, and could be quite a slurry.
> 
> Which segues into the topic on cow dung from India containing plastic.  I was actually making a glancing reference to a really bad situation.  Cows in India are dying from plastic pollution that causes impacted rumens.   That is not a problem in Bangladesh, because the Government restricts the use of plastic packaging.
> 
> Cheers,
> Julien.
> 
> -- 
> Julien Winter
> Cobourg, ON, CANADA
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