Re: DIG-L: VS solids conversion

[Paul Harris <paul.harris@adelaide.edu.au>]

G'day,

Thank you for your questions on the digestion list.

The proportion of VS destroyed will vary with digester type, retention
time, operating temperature and waste type (to name a few variables),
but each kg VS destroyed provides 0.5 cubic metres of methane (and about
half that volume of CO2, as an approximation).

I have an excel implementation of a model that will let you see how the
main variables interact, available on request.

Hope this helps,
HOOROO

> "R.Edwards" wrote:
> 
> I am confused about the conversion of VS to biogas.
> 
> I have found info that states that 40 % of volatile solids are
> converted drectly to biogas.
> 
> Other sources have stated that 26 m3 of biogas are produced from 1
> tonne of fresh pig manure.
> 
> I can not seem to find a reliable answer to this question, any advice
> would be greatful,
> 
> R.Edwards

-- 
Paul Harris
Agronomy & Farming Systems
Faculty of Sciences
Adelaide University, Roseworthy Campus, AUSTRALIA 5371
Ph    : +61 8 8303 7880
Fax   : +61 8 8303 7979
mailto:paul.harris@adelaide.edu.au
http://www.roseworthy.adelaide.edu.au/~pharris

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