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Wet air oxidation induced enhanced biodegradability of distillery effluent

IR@CSIR-CFTRI

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Field	Value
Relation	http://ir.cftri.com/12310/ http://dx.doi.org/10.1016/j.jenvman.2014.01.026
Title	Wet air oxidation induced enhanced biodegradability of distillery effluent
Creator	Malik, S. N. Sarat Chandra, T. Tembhekar, P. D. Padoley, K. V. Mudliar, S. L. Mudliar, S. N.
Subject	03 Environmental Biology
Description	The present study reports the feasibility of Wet Air Oxidation (WAO) as a pretreatment option for enhanced biodegradation of complex distillery effluent. Initially, the distillery effluent was pretreated by WAO at different process conditions (pressure, temperature and time) to facilitate enhancement in the biodegradability index (BI ¼ BOD5: COD ratio). The biodegradability of WAO pretreated effluent was evaluated by subjecting it to aerobic biodegradation and anaerobic followed by aerobic biodegradation. Aerobic biodegradation of pretreated effluent with enhanced biodegradability index (BI ¼ 0.4e0.8) showed enhanced COD reduction of up to 67.7%, whereas the untreated effluent (BI ¼ 0.17) indicated poor COD reduction of only 22.5%. Anaerobic followed by aerobic biodegradation of pretreated effluent has shown up to 87.9% COD reduction, while the untreated effluent has shown only 43.1% COD reduction. Bio-kinetic parameters also confirmed the increased rate of bio-oxidation at enhanced BIs. The results indicate that the WAO pretreatment facilitates enhanced bio-oxidation/bio-degradation of complex effluents like the distillery spent wash.
Date	2014
Type	Article PeerReviewed
Format	application/pdf
Language	en
Rights	—
Identifier	http://ir.cftri.com/12310/1/Journal%20of%20Environmental%20Management%20136%20%282014%29%20132e138.pdf Malik, S. N. and Sarat Chandra, T. and Tembhekar, P. D. and Padoley, K. V. and Mudliar, S. L. and Mudliar, S. N. (2014) Wet air oxidation induced enhanced biodegradability of distillery effluent. Journal of Environmental Management, 136. pp. 132-138.