Improving methane yield and quality via co-digestion of cow dung mixed with food waste

Sanjeev Kumar Awasthi; Rutu Joshi; Hiya Dhar; Shivpal Verma; Mukesh Kumar Awasthi; Sunita Varjani; Surendra Sarsaiya; Zengqiang Zhang; Sunil Kumar

doi:10.1016/j.biortech.2017.12.063

Improving methane yield and quality via co-digestion of cow dung mixed with food waste

Bioresour Technol. 2018 Mar:251:259-263. doi: 10.1016/j.biortech.2017.12.063. Epub 2017 Dec 22.

Authors

Sanjeev Kumar Awasthi¹, Rutu Joshi², Hiya Dhar², Shivpal Verma², Mukesh Kumar Awasthi³, Sunita Varjani⁴, Surendra Sarsaiya⁵, Zengqiang Zhang⁶, Sunil Kumar⁷

Affiliations

¹ College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, China; Solid and Hazardous Waste Management Division, CSIR-National Environmental Engineering Research Institute (CSIR-NEERI), Nagpur 440 020, Maharashtra, India.
² Solid and Hazardous Waste Management Division, CSIR-National Environmental Engineering Research Institute (CSIR-NEERI), Nagpur 440 020, Maharashtra, India.
³ College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, China; Department of Biotechnology, Amicable Knowledge Solution University, Satna, India.
⁴ Gujarat Pollution Control Board, Sector-10A, Gandhinagar 382010, Gujarat, India.
⁵ Key Laboratory of Basic Pharmacology of Ministry of Education, Zunyi Medical University, Zunyi, Guizhou, China.
⁶ College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, China.
⁷ Solid and Hazardous Waste Management Division, CSIR-National Environmental Engineering Research Institute (CSIR-NEERI), Nagpur 440 020, Maharashtra, India. Electronic address: s_kumar@neeri.res.in.

PMID: 29287278
DOI: 10.1016/j.biortech.2017.12.063

Abstract

Methane (CH₄) production and quality were enhanced by the co-digestion of cow dung and food waste (FW) mixed with organic fraction of municipal solid waste (OFMSW) under optimized conditions in bench and semi continuous-scale mode for a period of 30 days. A bacterium capable of high yield of CH₄ was enriched and isolated by employing activated sewage sludge as the inoculums. The thirteen bacterial isolates were identified through morphological and biochemical tests. Gas chromatography was used to analyze the chemical compositions of the generated biogas. CH₄ yields were significantly higher during co-digestion of Run II (7.59 L) than Run I (3.7 L). Therefore, the co-digestion of FW with OFMSW and Run II was observed to be a competent method for biogas conversion from organic waste resources.

Keywords: Anaerobic digestion; Bacterial isolates; Biochemical test; Cow dung; Methane yield.

MeSH terms

Anaerobiosis
Animals
Biofuels*
Bioreactors
Cattle
Female
Food
Methane*
Refuse Disposal
Sewage
Solid Waste

Substances

Biofuels
Sewage
Solid Waste
Methane