[Stoves] [biochar-production] Re: Stoves Digest, Vol 14, Issue 17

[Anand Karve]

Dear Crispin,
Biogas slurry contains all the inorganic components in the original
biomass, plus certain organic compounds which the anaerobes are unable
to digest. Being an anaerobic process, there are a number of reduced
compounds in the slurry like NH3, H2S, etc. which serve as food for
the soil micro-organisms, which oxidise these compounds to gain
energy. N, P and S are generally lost while burning the biomass. But
biogas slurry contains them because biogas is formed at lower
temperature.
Yours
A.D.Karve

On Fri, Oct 28, 2011 at 11:31 PM, Crispin Pemberton-Pigott
<crispinpigott at gmail.com> wrote:
> Dear AD
>
>
>
>>Char can affect soil characteristics like soil texture, water holding
>> capacity, density, degree of compaction, etc.
>
>
>
> And
>
>
>
>>If one wants to extract some energy out of biomass before putting it into
>> soil, one should convert biomass into biogas and apply the effluent to the
>> soil.
>
>
>
> So it seems we need to check what the comparative advantages of biogas
> slurry and biochar are. Perhaps both would help. I have not heard of a
> negative result from adding slurry.
>
>
>
> Regards
>
> Crispin
>
>
>
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-- 
***
Dr. A.D. Karve
Trustee & Founder President, Appropriate Rural Technology Institute (ARTI)