Journal
JOURNAL OF CLEANER PRODUCTION
Volume 236, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jclepro.2019.117703
Keywords
Anaerobic co-digestion; Blackwater; Kitchen organic waste; Hydrolysis rate constant; Clostridiaceae 1; Hydrogenotrophic methanogens
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Funding
- Natural Sciences and Engineering Research Council of Canada (NSERC) Collaborative Research and Development (CRD) Grant
- NSERC Industrial Research Chair (IRC) Programin Sustainable Urban Water Development
- Alberta Innovates
- EPCOR Water Services
- EPCOR Drainage
- WaterWerx
- Canada Research Chair (CRC) in Future Community Water Services
- Mitacs Accelerate Postdoctoral Fellowship
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The current study was conducted to investigate the effects of mixing ratios on anaerobic co-digestion of blackwater and kitchen organic waste. The biological methane potential (BMP) of co-digested blackwater and kitchen waste were 0.85 +/- 0.07 and 0.83 +/- 0.06 at volatile solids (VS) ratios of 1:2 and 1:3 whereas the BMP of blackwater alone was 0.34 +/- 0.01. The hydrolysis efficiency improved from 57 +/- 8% in anaerobic digestion of blackwater alone to 87 +/- 8% in the blackwater/kitchen waste co-digestion condition. The methane production yield increased from 449 +/- 32 Nml CH4/gVS for blackwater only to 680 +/- 58 and 630 +/- 52 Nml CH4/gVS at blackwater/kitchen waste VS ratios of 1:2 to 1:3. Hydrogenotrophic methanogens dominated the methanogen community under a blackwater/kitchen waste VS ratio of 1:2 condition. The results suggest that blackwater energy recovery can be improved by co-digesting blackwater with kitchen waste. (C) 2019 Published by Elsevier Ltd.
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