NDLI: Biogas Production by Anaerobic Co-Digestion of Dairy Wastewater with the Crude Glycerol from Slaughterhouse Sludge Cake Transesterification

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Biogas Production by Anaerobic Co-Digestion of Dairy Wastewater with the Crude Glycerol from Slaughterhouse Sludge Cake Transesterification

Content Provider	Semantic Scholar
Author	Chou, Yu-Chun Su, Jung-Jeng
Copyright Year	2019
Abstract	Excessive sludge in the wastewater treatment basins has to be removed periodically and collected as the form of sludge cake for promising good water quality of the effluent. This study aims to evaluate the feasibility of biogas production by anaerobic co-digestion of dairy cattle wastewater and crude glycerol from transesterification of sludge cake. Different ratios of crude glycerol, i.e., 2, 4, and 8% (v/v), from the previous experiment were mixed with dairy cattle wastewater and inoculated with anaerobic sludge in cap-sealed 1-L serum bottles as anaerobic digesters. Although the 8% crude glycerol set showed the highest total biogas and methane production, low pH from volatile fatty acid accumulation decreased the removal efficiency of chemical oxygen demand, biochemical oxygen demand, and suspended solids after a 14-d incubation period. The experimental sets with 2 and 4% of crude glycerol increased total methane production up to 177 and 226% compared to the control set, respectively. We found that addition of crude glycerol decreased removal efficiency of total solids and volatile solids. In our study, we proved that slaughterhouse sludge cake is a feasible feedstock for producing biogas through transesterification and anaerobic co-digestion.
File Format	PDF HTM / HTML
DOI	10.3390/ani9090618
PubMed reference number	31466250
Journal	Medline
Volume Number	9
Journal	Animals : an open access journal from MDPI
Alternate Webpage(s)	https://res.mdpi.com/d_attachment/animals/animals-09-00618/article_deploy/animals-09-00618.pdf
Alternate Webpage(s)	https://doi.org/10.3390/ani9090618
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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