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To: Snowshoe who wrote (4698)3/7/2006 8:21:38 AM
From: Crabbe  Read Replies (1) | Respond to of 219655
 
As I stated earlier the EROEI for switchgrass is about 8.3 to 1. EROEI for waste streams can be even better. Negative cost for the feedstream, energy savings in disposal. An example of a waste stream that has great promise is the effluent from a paper mill, it is already pulverized in a slurry, just add enzymes or bacteria, or GM (genetically modified) yeast, wait a few hours and distill.

Addressing earlier concerns about soil depletion. Switchgrass has approximately half of it's mass below ground, half above, it requires little if any fertilizer, requires replanting about once every 10-12 years. Requires no irrigation. Only harvesting, ie mowing, bailing, and local transportation to the ethanol refinery.

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To: Snowshoe who wrote (4698)3/7/2006 8:47:10 AM
From: kormac  Read Replies (1) | Respond to of 219655
 
How do you "burn" ethanol in a fuel cell?



To: Snowshoe who wrote (4698)3/7/2006 9:02:29 AM
From: Moominoid  Read Replies (1) | Respond to of 219655
 
Fuel cells are more efficient in power production but when all costs of production are included are they? They certainly cost a lot at the moment.


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