Co-digestion of blackwater with kitchen organic waste: Effects of mixing ratios and insights into microbial community

L Zhang; B Guo; Q Zhang; A Florentino; R Xu; Y Zhang; Y Liu

doi:10.1016/j.jclepro.2019.117703

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Co-digestion of blackwater with kitchen organic waste: Effects of mixing ratios and insights into microbial community

Journal article

Peer reviewed

Co-digestion of blackwater with kitchen organic waste: Effects of mixing ratios and insights into microbial community

L Zhang, B Guo, Q Zhang, A Florentino, R Xu, Y Zhang and Y Liu

Journal of cleaner production, Vol.236, 117703

01/11/2019

DOI: https://doi.org/10.1016/j.jclepro.2019.117703

Abstract

Anaerobic co-digestion

Blackwater

Clostridiaceae 1

Hydrogenotrophic methanogens

Hydrolysis rate constant

Kitchen organic waste

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. [Display omitted]

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Title: Co-digestion of blackwater with kitchen organic waste: Effects of mixing ratios and insights into microbial community
Creators: L Zhang - University of Surrey, School of Chemistry and Chemical Engineering
B Guo - University of Surrey, School of Sustainability, Civil and Environmental Engineering
Q Zhang - University of Surrey, School of Chemistry and Chemical Engineering
A Florentino - Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Canada
R Xu - Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Guangdong Institute of Eco-environmental Science & Technology, Guangzhou, 510650, China
Y Zhang - University of Surrey, School of Computer Science and Electronic Engineering
Y Liu - University of Surrey, School of Chemistry and Chemical Engineering
Publication Details: Journal of cleaner production, Vol.236, 117703
Publisher: Elsevier
Date published: 01/11/2019
Date accepted: 16/07/2019
Grant note: The authors acknowledge financial support from the Natural Sciences and Engineering Research Council of Canada (NSERC) Collaborative Research and Development (CRD) Grant, an NSERC Industrial Research Chair (IRC) Program in Sustainable Urban Water Development (Liu, Y.) through the support of EPCOR Water Services, EPCOR Drainage, Alberta Innovates, and WaterWerx, the Canada Research Chair (CRC) in Future Community Water Services (Liu, Y.), and a Mitacs Accelerate Postdoctoral Fellowship (Zhang, L.).
Identifiers: 99606722702346
Academic Unit: School of Sustainability, Civil and Environmental Engineering
Language: English
Resource Type: Journal article

Co-digestion of blackwater with kitchen organic waste: Effects of mixing ratios and insights into microbial community

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