permacycler 
Member since Jan 26, 2010


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Re: “Compost or Biogas?

I love your article - its very well written! However, biodigesters diverts food scraps from compost production, which is vital way of returning nutrients to agricultural soils without using petrochemicals and fertilizers. If we grow food on farms, we're taking carbon out of the soil. Ultimately, using food scraps for compost closes that loop. Biogas competes with compost production, and consequently still produces a bi-product of biosolids that are trucked off to landfills. Only, instead of 20 trucks of food scraps, the biodigester reduces it down to say, 1 truck of biosolids. The methane used to power the plant might be created and then used within a few days, whereas the compost is part of unending food system cycle - a regeneration of food-to-soil energy. I'm all for alternative energy invention, but think that the innovative collection system of food scraps in the Bay Area is better used to replenish the nutrient cycle in our ecosystem.

0 likes, 2 dislikes
Posted by permacycler on 01/26/2010 at 4:05 PM

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