Journal
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
Volume 78, Issue 11, Pages 1121-1127Publisher
JOHN WILEY & SONS LTD
DOI: 10.1002/jctb.908
Keywords
biodegradability; kinetics; phenolic compounds; ozone; vinasse
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The production of ethanol by fermentation and subsequent distillation generates wastewater known as 'vinasse'. This waste is highly polluting on account of its high organic load and antibacterial activity-which arises from the presence of phenolic compounds that reduce the efficiency of the detoxification treatments best suited to this type of waste (eg anaerobic digestion). This can be avoided by using a pre-treatment based on a chemical oxidant (ozone) at an acid or alkaline pH. Ozonation in acid media provides more selective elimination of phenolic compounds and a more readily biodegradable waste (ie an increased BOD5/COD ratio). (C) 2003 Society of Chemical Industry
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