[Stoves] Stoves Digest, Vol 4, Issue 13

[rajan_jiby at dataone.in]

----- Original Message ----- 
From: "Kevin" <kchisholm at ca.inter.net>
To: <rajan_jiby at dataone.in>; "Discussion of biomass cooking stoves" 
<stoves at lists.bioenergylists.org>
Sent: Tuesday, 07 December, 2010 06:55 PM
Subject: Re: [Stoves] Stoves Digest, Vol 4, Issue 13


> Dear Rajan
> ----- Original Message ----- 
> From: <rajan_jiby at dataone.in>
>
>
>>>
>>> The washed dung will tend to be high in lignin, and relatively low in 
>>> cellulose, in that the animal would have digested much of the original 
>>> cellulose in the feed. Depending on the degree of washing and the 
>>> characteristics of the washed dung, it may, or may not have sufficient 
>>> binders to hold the washed dung together in the desired shape. 
>>> Experimental work would be necessary to determine if added binders would 
>>> be required, and quantities required.
>>
>>
>> Dear Kevin,
>>
>> In case the binding properties are affected, that would be a disincentive 
>> to a certain extent. This is because, when dung cakes are made in India, 
>> the dung is mixed with loose materials like straw, etc. ( which are bulky 
>> and inconvenient fuels when used independently ). Here, the dung works as 
>> a binder also - apart from its role as a fuel.
>>
> # Good point here! If the dung washing removes binders, and prevents using 
> the agricultural wastes for fuel, there could be a negative energy 
> consequence. The question would then be health and fertilizer benefits 
> outweigh the disadvantages of having to change the way in which 
> agricultural wastes are used for fuel. Would there be an opportunity for 
> an improved stove system that burned such agricultural wastes?
>

Dear Kevin,

Well, we also use biogas plants where animal dung is a major feedstock.

Here the energy part comes out as methane ( which is used as fuel ) and the 
slurry from the plant contains all the nutrients ( without any loss ).

Best Regards,


Rajan