[Stoves] Dung vs Carbohydrate digestors

[Thomas Reed]

Dear Tom and All:

I've had a low opinion of methane digestors as long as they were using 
dung after the cow  (plus 50 M years of development) had already 
digested it in > 4 stomachs . It isn't surprising that it takes 1 m3 of 
digestor to make 1 m3 of gas per day.

When ADKARVE suggested using carabohydrates/waste food for digestion it 
made much more sense, according to

2 CH2O ==> CH4 + CO2

How many m3/day does this make?  (I hope someone will give better volume 
productions if I'm off.) 

TOM REED              BEF

Tom Miles wrote:
> Sounds like a perfect application for a versatile plant. Use the plant for
> its agronomic and environmental benefits. Use the oil for its highest value.
> Digest the cake for the cooking and lighting. And use the rich bio-solid
> residues for the garden plot. 
>
>
> Erik will have to build a Compact Biogas unit for his jatropha project.  
>
> Thanks
>
> Tom                                
>
> -----Original Message-----
> From: adkarve at vsnl.com [mailto:adkarve at vsnl.com] On Behalf Of adkarve
> Sent: Thursday, September 14, 2006 7:24 PM
> To: stoves at listserv.repp.org
> Cc: Tom Miles
> Subject: Re: [Stoves] Thre thoughts of Jatropha as stove fuel
>
> Dear Tom,
> Jatropha oilcake works very well in the compact biogas system, yielding
> about 800litres of biogas per kg of oilcake
> Yours
> A.D.Karve
> ----- Original Message -----
> From: Tom Miles <tmiles at trmiles.com>
> To: 'Jonathan Otto' <ottojonathan at hotmail.com>; <rstanley at mind.net>;
> <e.j.rodenhuis at student.utwente.nl>
> Cc: <stoves at listserv.repp.org>
> Sent: Thursday, September 14, 2006 7:41 AM
> Subject: Re: [Stoves] Thre thoughts of Jatropha as stove fuel
>
>
>   
>> How well would the Jatropha seedcake work in the ARTI Compact Biogas
>> digester?
>> http://bioenergylists.org/en/compactbiogas
>>
>> Tom Miles
>>
>>
>>
>>   _____
>>
>> From: Jonathan Otto [mailto:ottojonathan at hotmail.com]
>> Sent: Wednesday, September 13, 2006 5:32 PM
>> To: tmiles at trmiles.com; rstanley at mind.net;
>>     
> e.j.rodenhuis at student.utwente.nl
>   
>> Cc: stoves at listserv.repp.org
>> Subject: Thre thoughts of Jatropha as stove fuel
>>
>>
>>
>> Dear All,
>>
>> 3. Jatropha seedcake works very nicely in a poly-tube type biogas
>>     
> digester,
>   
>> replacing animal excrement, of which so many have spoken so eloquently in
>> recent exchanges. In direct burning, the residual oil does flame but smoke
>> is a major issue we have not overcome. Besides seecake makes a nitrogen
>>     
> rick
>   
>> organic fertilizer that tropical soils bedly need.
>>
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>>     
>
>
>
>
>
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