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Advanced methanogenic performance and fouling mechanism investigation of a high-solid anaerobic membrane bioreactor (AnMBR) for the co-digestion of food waste and sewage sludge
Cheng, Hui1; Li, Yemei1; Guo, Guangze2; Zhang, Tao1; Qin, Yu1; Hao, Tianwei3; Li, Yu You1,2
2020-12-15
Source PublicationWater Research
ISSN0043-1354
Volume187Pages:116436
Abstract

Disposal of the increasingly huge amounts of sewage sludge (SeS) has become an impending problem worldwide. To solve this problem, a high-solid anaerobic membrane bioreactor (AnMBR) was used for the anaerobic co-digestion (AcoD) of SeS and food waste (FW). This study investigated the effects of SeS ratio on the methanogenic performance of the AcoD with a gradual increase value from 0 to 25%, 50%, 75% and 100% (total solids based). The results showed that the highest methanogenic performance was achieved at mono FW digestion. As for the co-digestion, the optimal FW/SeS ratio for methanogenic performance was 75%:25% among all the mixing ratios. The COD based biogas yield and methane yield were 0.498 L-biogas/g-COD and 0.295 L-CH/g-COD at this optimal mixing ratio, which were 67.7% and 67.6% higher than those of the mono SeS digestion, respectively. The upgraded values were attributed to the improved hydrolysis ratio (by 8.14%) and the balanced carbon-to-nitrogen (C/N) ratio by co-digestion with FW, which synergistically stimulated methanogenesis ratio by 81.0%. The continuous membrane filtration property was investigated and four typical trans-membrane pressure (TMP) variation curves at different fouling degrees were determined. The membrane could sustainably operate at a flux of 6 L/m/h (LMH) at the mixed liquor total solids (MLTS) concentration of 25 - 30 g/L. The combination of continuous membrane filtration property, particle size distribution of the mixed liquor and the external forces analysis was firstly applied to unravel the membrane fouling mechanism of a high-solid AnMBR. The result of this study will contribute to the establishment of an efficient FW and SeS treatment strategy.

KeywordSewage Sludge Food Waste Anaerobic Co-digestion High-solid Anmbr Fouling Mechanism
DOI10.1016/j.watres.2020.116436
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaEngineering ; Environmental Sciences & Ecology ; Water Resources
WOS SubjectEngineering, Environmental ; Environmental Sciences ; Water Resources
WOS IDWOS:000589970400015
Scopus ID2-s2.0-85091255632
Fulltext Access
FWCI2.9174755
Citation statistics
Cited Times [WOS]:41   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionDEPARTMENT OF CIVIL AND ENVIRONMENTAL ENGINEERING
Corresponding AuthorLi, Yu You
Affiliation1.Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, Sendai, 6-6-06 Aoba, Aramaki-Aza, 980-8579, Japan
2.Department of Frontier Science for Advanced Environment, Graduate School of Environmental Studies, Tohoku University, Sendai, 6-6-20 Aoba, Aramaki-Aza, 980-8579, Japan
3.Department of Civil and Environmental Engineering, Faculty of Science and Technology, University of Macau, Maca
Recommended Citation
GB/T 7714
Cheng, Hui,Li, Yemei,Guo, Guangze,et al. Advanced methanogenic performance and fouling mechanism investigation of a high-solid anaerobic membrane bioreactor (AnMBR) for the co-digestion of food waste and sewage sludge[J]. Water Research,2020,187:116436.
APA Cheng, Hui,Li, Yemei,Guo, Guangze,Zhang, Tao,Qin, Yu,Hao, Tianwei,&Li, Yu You.(2020).Advanced methanogenic performance and fouling mechanism investigation of a high-solid anaerobic membrane bioreactor (AnMBR) for the co-digestion of food waste and sewage sludge.Water Research,187,116436.
MLA Cheng, Hui,et al."Advanced methanogenic performance and fouling mechanism investigation of a high-solid anaerobic membrane bioreactor (AnMBR) for the co-digestion of food waste and sewage sludge".Water Research 187(2020):116436.
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