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Sulfate in anaerobic co-digester accelerates methane production from food waste and waste activated sludge
Feixiang Zan1; Tianwei Hao2
2020-02-01
Source PublicationBIORESOURCE TECHNOLOGY
ISSN0960-8524
Volume298
Abstract

The presence of sulfate in food waste (FW) and waste activated sludge (WAS) threatens the anaerobic co-digestion for methane production. In this study, methane production from the anaerobic co-digestion of FW and WAS at sulfate concentrations of 50, 100, and 400 mg S/L was not affected, but instead deteriorated at 200 and 300 mg S/L. However, a model-based kinetic analysis reveals that sulfate can significantly promote the conversion of rapidly biodegradable substrates by up to 93%. From a point of thermodynamic view, the presence of sulfate can stimulate sulfate-reducing bacteria acting as acetogens to convert propionate to acetate, providing an alternative metabolic pathway for methanogenesis. In the anaerobic co-digestion, regulation of sulfate can be a potential strategy to improve the efficiency of methane production. However, more research is needed to optimize the sulfate concentration and substrate types in the anaerobic co-digester.

KeywordAnaerobic Co-digestion Food Waste Sulfate Sulfate-reducing Bacteria Waste Activated Sludge
DOI10.1016/j.biortech.2019.122536
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaAgriculture ; Biotechnology & Applied Microbiology ; Energy & Fuels
WOS SubjectAgricultural Engineering ; Biotechnology & Applied Microbiology ; Energy & Fuels
WOS IDWOS:000505201600007
Scopus ID2-s2.0-85076181654
Fulltext Access
FWCI1.9404234
Citation statistics
Document TypeJournal article
CollectionDEPARTMENT OF CIVIL AND ENVIRONMENTAL ENGINEERING
Corresponding AuthorTianwei Hao
Affiliation1.Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong
2.Department of Civil and Environmental Engineering, Faculty of Science and Technology, University of Macau, Macau, China
Corresponding Author AffilicationFaculty of Science and Technology
Recommended Citation
GB/T 7714
Feixiang Zan,Tianwei Hao. Sulfate in anaerobic co-digester accelerates methane production from food waste and waste activated sludge[J]. BIORESOURCE TECHNOLOGY,2020,298.
APA Feixiang Zan,&Tianwei Hao.(2020).Sulfate in anaerobic co-digester accelerates methane production from food waste and waste activated sludge.BIORESOURCE TECHNOLOGY,298.
MLA Feixiang Zan,et al."Sulfate in anaerobic co-digester accelerates methane production from food waste and waste activated sludge".BIORESOURCE TECHNOLOGY 298(2020).
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