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From Wikipedia

"In the past, vinasse was a problem in production of ethanol, but vinasse is also a good fertilizer (at least for some time) and a source of methane that can be used to generate heat or electricity. Moreover, other uses of vinasse involving also the formulation of nutritive solutions for hydroponics, formulation of culture media for plant tissue culture and culture media for algal growth."

Seems like it's only a problem because it's being dumped and not being purchased for reuse.




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