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Wet air oxidation pretreatment of biomethanated distillery effluent: Mapping pretreatment efficiency in terms color, toxicity reduction and biogas generation

Sarat Chandra, T. and Malik, S. N. and Suvidha, G. and Padmere, M. L. (2014) Wet air oxidation pretreatment of biomethanated distillery effluent: Mapping pretreatment efficiency in terms color, toxicity reduction and biogas generation. Bioresource Technology, 158. pp. 135-140.

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Abstract

The effluents from molasses-based distilleries after biomethanation are beset with problems of intensified dark brown color, high residual COD, low biodegradability index (BOD/COD ratio <0.2) and toxicity issues for possible land application as a potential fertilizer. Wet air oxidation (WAO) pretreatment of biomethanated distillery effluent resulted in substantial enhancement in the biodegradability index (BI) (up to 0.8). WAO pretreated effluent on anaerobic digestion indicated favorable biogas generation with methane content up to 64% along with concomitant COD reduction up to 54.75%. The HPLC analysis indicated that the pretreatment facilitated degradation of major color containing compounds-namely melanoidins, up to 97.8%. The pretreated effluent with enhanced biodegradability along with substantially reduced color also indicated positive effect on seed germination (up to 100%), implying toxicity reduction of the effluent post WAO pretreatment.

Item Type: Article
Uncontrolled Keywords: Wet air oxidation Distillery effluent Melanoidin Seed germination Anaerobic degradation
Subjects: 600 Technology > 01 Medical sciences > 17 Toxicology
Depositing User: Food Sci. & Technol. Information Services
Date Deposited: 22 Sep 2016 11:00
Last Modified: 03 Oct 2018 06:20
URI: http://ir.cftri.com/id/eprint/12306

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