The production of ethanol from cane molasses has provided many benefits to the sugar industry. However, disposal of the vinasse that remains after distillation presents a major environmental challenge. From 10 to 15 tons of vinasse are produced for every ton of alcohol. This product is high in potassium, BOD and COD and lacks valuable constituents that other types of vinasse have, such as those from wine, beets and corn. Various uses for vinasse are discussed, and practices in China, India and Brazil are mentioned. The composition of vinasse is outlined. Some newer ideas on disposal include anaerobic digestion, bio-composting, and on-site incineration as an additional fuel source. Some work done with Colombian vinasse will be highlighted.
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