[Digestion] the perpetual motion machine

[Hoysall Chanakya]

The grand perpetual motion machine symptoms,
Not really - what you need to see is that there will be losses and
leakages from this "grand system" and to keep it running you need to
reduce your energy losses to minimum and have practically no N losses.  At
some scale your dream will come true.  Then of course comes the cost -->
where you need to decide if it is worth it afterall.
best wishes
chanakya


> Okay... since we're on a roll here, tell me if you think a scenario
> similar to the following sounds TOO FAR OUT:
>
> animal manure goes into an in-ground plug/flow digester;
> spent digestate goes to both sediment pond and aerobic compost pile;
> sediment pond produces duckweed and nutrient for hydroponic grow beds;
> duckweed is harvested and dried for animal feed;
> methane produced runs an engine;
> engine coolant keeps digester warm (radiator coils wrap around digester);
> engine runs generator to produce electricity;
> electricity lights and runs pumps for hydro
> .... what have I forgotten?
>
>
>
>
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>
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-- 
Dr. Hoysall Chanakya
Centre for Sustainable Technologies
(Assoc. Faculty at Centre for Infrastructure, Sustainable Transport and
Urban Planning (CiSTUP) and Centre for Contemporary Studies)
Indian Institute of Science, Bangalore 560 012
ph 91-80-2293 3046; fax-91 80 2360 0683


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