H 2 O 2 induced cost effective microwave disintegration of dairy waste activated sludge in acidic environment for efficient biomethane generation

This study aimed to improve the biomethane potential of dairy waste activated sludge (WAS) by H O -acidic pH induced microwave disintegration (HAMW-D) pretreatment approach. The results of HAMW-D compared with the microwave disintegration (MW-D) alone for energy and economic factors. In the two phas...

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Bibliographic Details
Published in:Bioresource technology 2017-11, Vol.244 (Pt 1), p.688
Main Authors: Eswari, A Parvathy, Kavitha, S, Banu, J Rajesh, Karthikeyan, O Parthiba, Yeom, Ick-Tae
Format: Article
Language:English
Subjects:
Hydrogen Peroxide
Methane
Microwaves
Sewage
Waste Disposal, Fluid
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Summary:This study aimed to improve the biomethane potential of dairy waste activated sludge (WAS) by H O -acidic pH induced microwave disintegration (HAMW-D) pretreatment approach. The results of HAMW-D compared with the microwave disintegration (MW-D) alone for energy and economic factors. In the two phase disintegration process, the H O concentration of about 0.5mg/g SS under acid pH of 5 was found to be optimum for effective dissociation of Extracellular Polymeric Substances (EPS) matrix. A higher liquefaction of about 46.6% was achieved in HAMW-D when compared to that of MW-D (30%). It subsequently improved the methane yield of about 250mL/g VS in HAMW-D, which was 9.6% higher than MW-D. A net profit of about 49€/ton was achieved for HAMW-D, therefore it is highly recommended for WAS pretreatment.
ISSN:1873-2976