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Ozonation of vinasse in acid and alkaline media
Author(s) -
Martín Santos MA,
Fernández Bocanegra JL,
Martín Martín A,
García García I
Publication year - 2003
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.908
Subject(s) - vinasse , chemistry , anaerobic digestion , wastewater , distillation , pulp and paper industry , fermentation , waste management , chemical industry , sewage treatment , organic chemistry , methane , engineering
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 BOD 5 /COD ratio). Copyright © 2003 Society of Chemical Industry