Increased biodegradability of low-grade coal wastewater in anaerobic membrane bioreactor by adding yeast wastes
- Authors
- Yun, Yeo-Myeong; Kim, Myungchan; Kim, Hyojeon; Kim, Dong-Hoon; Kwon, Eilhann E.; Kang, Seoktae
- Issue Date
- Mar-2019
- Publisher
- ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
- Keywords
- Anaerobic membrane bioreactor; EEM; Low-grade coal wastewater; Methane production; Metagenomic analysis
- Citation
- JOURNAL OF ENVIRONMENTAL MANAGEMENT, v.234, pp 36 - 43
- Pages
- 8
- Indexed
- SCI
SCIE
SCOPUS
- Journal Title
- JOURNAL OF ENVIRONMENTAL MANAGEMENT
- Volume
- 234
- Start Page
- 36
- End Page
- 43
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/189504
- DOI
- 10.1016/j.jenvman.2018.12.083
- ISSN
- 0301-4797
1095-8630
- Abstract
- Demineralization is required in upgrading low-grade coal to serve as an alternative energy resource for the production of fuel and valuable chemicals but generates a large amount of low-grade coal wastewater (LCWW). The objective of this study was to investigate the effects of a co-substrate on an anaerobic membrane bioreactor (AnMBR) treating LCWW. CH4 was not produced during the operation fed by LCWW alone. When yeast wastes (YW) were supplemented, there was a gradual increase in the biodegradability of LCWW, achieving 182 CH4 mL/g COD with 58% COD removal efficiency. The analysis of physicochemical characteristics in the effluent of AnMBR, done by excitation-emission matrix (EEM) and size exclusion chromatography (SEC), showed that the proportion of soluble microbial products (SMPs) and aromatic group with high-molecular weight ( > 1 kDa) increased. Microbial analysis revealed that the increased dominance of bacteria Cornamonas, Methanococcus, and Methanosarcina facilitated biodegradation of LCWW in the presence of YW.
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