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Hydrothermal and alkaline hydrothermal pretreatments plus anaerobic digestion of sewage sludge for dewatering and biogas production: Bench-scale research and pilot-scale verification
Li, Chunxing1; Wang, Xingdong1; Zhang, Guangyi2; Yu, Guangwei1; Lin, Jingjiang1; Wang, Yin1
2017-06-15
Source PublicationWATER RESEARCH
ISSN0043-1354
Volume117Pages:49-57
Abstract

To test the feasibility and practicability of the process combing hydrothermal pretreatment for dewatering with biogas production for full utilization of sewage sludge, hydrothermal/alkaline hydrothermal pretreatments and in turn anaerobic digestion of the filtrates obtained after dewatering the pretreated sludge were performed at bench- and pilot-scales. The hydrothermal temperature fell within the range of 140 degrees C-220 degrees C and the pretreatment time varied from 30 min to 120 min. For the alkaline hydrothermal pretreatment the pH value of the sludge was adjusted to 9.0-11.0 by adding Ca(OH)(2). The results showed that the dewaterability of the sewage sludge was improved with increasing pretreatment temperature but the impact of the pretreatment time was not significant. The addition of Ca(OH)(2) gave better performance on the subsequent mechanical dewatering of the pretreated sludge compared to pure hydrothermal pretreatment, and the higher the pH value was, the better the dewaterability of the pretreated sludge was. The conditions of 180 degrees C/30 min and 160 degrees C/60 min/pH = 10.0 (for hydrothermal and alkaline hydrothermal pretreatments, respectively) resulted in relatively good results in the theoretical energy balance, which were verified in the pilot-scale tests. Based on the data from the pilot tests, the alkaline hydrothermal process realized self-sufficiency in energy at the cost of a proper amount of CaO. (C) 2017 Elsevier Ltd. All rights reserved.

KeywordSewage Sludge Hydrothermal Pretreatment Dewatering Biogas Energy Balance
SubtypeArticle
WOS HeadingsScience & Technology ; Technology ; Life Sciences & Biomedicine ; Physical Sciences
DOI10.1016/j.watres.2017.03.047
Indexed BySCI
Language英语
WOS KeywordExtracellular Polymeric Substances ; Waste Activated-sludge ; Dewaterability ; Temperature ; Hydrolysis ; Cacl2
WOS Research AreaEngineering ; Environmental Sciences & Ecology ; Water Resources
WOS SubjectEngineering, Environmental ; Environmental Sciences ; Water Resources
Funding OrganizationChina Japanese Research Cooperative Program(2016YFE0118000) ; National Natural Science Foundation of China-China(41373092) ; Industry Leading Key Projects of Fujian Province - China(2015H0044) ; Key Project of Young Talent of IUE, CAS - China(Y4L0681C90)
WOS IDWOS:000401386300006
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/22531
Collection多相复杂系统国家重点实验室
Affiliation1.Chinese Acad Sci, Inst Urban Environm, Key Lab Urban Pollutant Convers, Xiamen 36102, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Li, Chunxing,Wang, Xingdong,Zhang, Guangyi,et al. Hydrothermal and alkaline hydrothermal pretreatments plus anaerobic digestion of sewage sludge for dewatering and biogas production: Bench-scale research and pilot-scale verification[J]. WATER RESEARCH,2017,117:49-57.
APA Li, Chunxing,Wang, Xingdong,Zhang, Guangyi,Yu, Guangwei,Lin, Jingjiang,&Wang, Yin.(2017).Hydrothermal and alkaline hydrothermal pretreatments plus anaerobic digestion of sewage sludge for dewatering and biogas production: Bench-scale research and pilot-scale verification.WATER RESEARCH,117,49-57.
MLA Li, Chunxing,et al."Hydrothermal and alkaline hydrothermal pretreatments plus anaerobic digestion of sewage sludge for dewatering and biogas production: Bench-scale research and pilot-scale verification".WATER RESEARCH 117(2017):49-57.
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