138 comments on DrumBeat: October 31, 2006
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138 comments on DrumBeat: October 31, 2006
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GAIA Host Collective
(1) Only C & H (as CH4 or others) are burned and released to the atmosphere. I know that in tradional (cow-manure) biogas plants solid residue is returned to the fields as fertilizer. Looks like this is possible here also. This means that
(a) No atmospheric pollution
(b) minized depletion of soil nutrients
(2) non-grain waste from food crops for e.g. could be used as feed-stock. Right now if plant waste is returned directly to the soil the microbes that break it up release energy directly to the enviroment, without sending it through a cooking stove first :-)
(3)) Compress the bio-gas and use it in a vehicle. In India, many cars have been modified to run on LPG (cooking gas - the stuff used on gas grills in the States) because of a lower cost/Joule.
(4) Generate electricity in a thermal cycle or directly a Fuel Cell.
The options also appear sustainable.
May come to pass as fossil fuels are taxed or run out.