期刊
WATER ENVIRONMENT RESEARCH
卷 90, 期 11, 页码 1985-1996出版社
WILEY
DOI: 10.2175/106143017X15054988926433
关键词
aerobic biological treatment; mezcal vinasses; ozonation; phenols; total aromatic compounds
资金
- Group of Environmental Biotechnology and Renewable Energy at the Centro de Investigacion y de Estudios Avanzados del Instituto Politecnico Nacional, Technological University of Mixteca
- National School of Biological Sciences
- Consejo Nacional de Ciencia y Tecnologia
- Consejo Nacional de Ciencia y Tecnologia (Mexico) [188221]
In Mexico, mezcal production generates huge amounts of vinasses (mezcal vinasses) that cause negative environmental impacts. Thus, mezcal vinasses treatment is necessary before discharging to water bodies. Although there is no information for mezcal vinasses, similar effluents have been treated by biological processes (i.e., anaerobic and aerobic), usually complemented by oxidative chemical pretreatments (ozonation) and physicochemical methods. In this work, mezcal vinasses were first ozonated and then subjected to batch aerobic biological degradation. In the ozonation stage, organic matter removals were 4.5 to 11 % as COD, whereas the removal of aromatic compounds and phenols was 16 to 32 % and 48 to 83 %, respectively. In aerobic post-treatment, COD depletions up to 85% were achieved; removals in ozone-pretreated vinasses were higher (80-85 %) than those in raw vinasse (69 %). It seems that ozonation preferentially attacked the recalcitrant fraction of organic matter present in the vinasses and increased its aerobic biodegradability.
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