Journal
WASTE MANAGEMENT
Volume 105, Issue -, Pages 279-288Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.wasman.2020.02.018
Keywords
Blackwater; Organic kitchen waste; Co-digestion
Categories
Funding
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- NSERC Industrial Research Chair (IRC) Program in Sustainable Urban Water Development through EPCOR Water Services
- EPCOR Drainage
- Alberta Innovates
- WaterWerx
- Canada Research Chair (CRC) in Future Community Water Services
- Mitacs Accelerate Postdoctoral Fellowship
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Co-digestion of blackwater (BW) and organic kitchen waste (KW) is a promising and effective resourcere-covery based approach for municipal waste and wastewater treatment. In this study, anaerobic co-digestion treatments of BW and KW using anaerobic sequencing batch reactors under mesophilic and thermophilic conditions were compared. Our results showed that although higher sludge specific methanogenesis activities were observed in the thermophilic reactor, mesophilic treatment achieved significantly higher treatment capacity and methane production. It was concluded that thermophilic conditions introduced H-2 inhibition and reduced activities of syntrophic acetogenic bacteria and syntrophic acetate oxidizing bacteria in the reactor. Further investigation on microbial communities showed significantly different microbial communities between reactors, where Thermotogaceae and Methanothermobacter were the most prevalent bacteria and archaea in the thermophilic reactor, and Cloacamonaceae and Methanosarcina were the most prevalent ones in the mesophilic reactor. (C) 2020 Elsevier Ltd. All rights reserved.
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