[Stoves] Cleaning Dung

[Anand Karve]

Cattle dung consists mainly of non-digestible lignocellulosic material,
millions of micro-organisms, mucus produced by the animals and by the
microbes, and some minerals. In fact it is the microbes and the mucus in
the dung that yield biogas on anaerobic fermentation.  A pressurised sieve,
technically called a filter press, is the best device for separating the
non-soluble solids from the fluids. If the fluids contained the microbes
and the mucus, they should be subjected to anaerobic digestion before
allowing them to be used as manure.  Dung also has a very high ash content,
because of which its calorific value is rather low. Dry dung has calorific
value of about 3500 kcal/kg.  Has anybody measured the calorific value of
the solids in the dung, after removal of the fluids from it by using a
filter press?
Yours
A.D.Karve

On Sat, Feb 11, 2012 at 8:27 AM, Sarbagya Tuladhar <sarbagya007 at gmail.com>wrote:

>  Hi Boston
>
>
> I volunteered with EWB Australia in Nepal working on a clean dung burning
> stove and thus worked with the dung as a fuel . Washing of the dung was
> done and briquettes which was a real success. Paper pulp used as a binder
> worked really well. Also the chloride contents of the dung which is
> responsible for watery eyes was removed on washing the dung which was
> proven by the copper wire test. We even fabricated a simple dung press for
> the same. The liquid portion of the dung was reutilised as manure in the
> fields. Thus the whole sceptism about "should" use dung as manure in the
> fields and not as a cooking fuel was somewhat solved. Did not test the NPK
> contents of the liquid portion though...
>
> Sarbagya
>
> Sent from my iPhone
>
> On 11/02/2012, at 2:06 AM, Boston Nyer <bostonnyer at gmail.com> wrote:
>
>  Hello,
>
> I'm looking to clean/rinse cow dung and do not have any experience doing
> so.  Does anyone have any experience cleaning dung and would like to share?
>
>
> Thank you!
> Boston
>
> --
> Boston
>  Skype: BostonNyer
> Cell: (585) 503-3459
> www.burndesignlab.org
>
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-- 
***
Dr. A.D. Karve
Trustee & Founder President, Appropriate Rural Technology Institute (ARTI)
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