daytripper wrote in
:

It doesn't take much of a chemist to understand that a liter of
ethanol does not result from the conversion of 4 liters of water, let
alone 8. In fact, I don't know exactly how much water is actually
consumed in the process of fermentation but I'd bet a shiny new nickel
that it is less than 1 liter per liter of finished product.

Since I have one going up in my backyard, I've read its draft Environmental
Impact Statement. I have no idea how much water the reaction requires, but
the statement says that the facility will be drawing 800 gallons per minute
maximum. Most of that is eventually returned somehow, apparently.

--
Scott
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