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Effects of free nitrous acid and freezing co-pretreatment on sludge short-chain fatty acids production and dewaterability

文献类型：期刊论文

作者Wu, Yuqi1; Song, Kang1; Sun, Xiaoyan1; Li, Lu1; Wang, Wenlin2; Wang, Qilin3; Wang, Dongbo4
刊名SCIENCE OF THE TOTAL ENVIRONMENT
出版日期2019-06-15
卷号669页码:600-607
ISSN号0048-9697
关键词Waste activated sludge Anaerobic fermentation Freezing Free nitrous acid Short-chain fatty acids Dewaterability
DOI10.1016/j.scitotenv.2019.03.175
通讯作者Song, Kang(sk@ihb.ac.cn)
英文摘要Short-chain fatty acids (SCFAs) as recoverable carbon source from waste activated sludge anaerobic fermentation process have aroused wide concern. In this study, free nitrous acid (FNA) and freezing pretreatments were combined to enhance SCFAs yield and fermented sludge dewaterability in the anaerobic fermentation system. The effects of different FNA concentrations and different freezing conditions (with or without curing stages) were analysed and compared. The results indicated that combining 1.07 mg N/L FNA with 48 h continuous freezing at -5 degrees C, raised SCFAs production from 6.7 mg COD/g volatile suspended solids (VSS) for the blank (no pretreatment) up to 124.0 mg COD/g VSS. In addition, the minimal water content of the treated fermented sludge cake was 78.11%, which was less than that of the blank (81.22%). SCFAs production and dewaterability enhancement could be attributed to sludge disintegration induced by the co-pretreatment, which led to sludge solubilisation, organics release, methanogenesis inhibition and particle size variation. This study implied that FNA and freezing co-pretreatment has the potential to enhance SCFAs production and sludge dewaterability in wastewater treatment plants. (C) 2019 Elsevier B.V. All rights reserved.
WOS关键词WASTE ACTIVATED-SLUDGE ; PROMOTES HYDROGEN-PRODUCTION ; LOW-ORGANIC-CONTENT ; ANAEROBIC FERMENTATION ; ALKALINE FERMENTATION ; METHANE PRODUCTION ; DARK FERMENTATION ; NITRITE ; BIOPRODUCTION ; ENHANCEMENT
资助项目National Natural Science Foundation of China[41877344] ; Chinese Academy of Sciences[Y75Z01-1-401] ; Chinese Academy of Sciences[Y82Z08-1-401] ; National Water Science and Technology Project[2018ZX07208001]
WOS研究方向Environmental Sciences & Ecology
语种英语
出版者ELSEVIER SCIENCE BV
WOS记录号WOS:000463663500057
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; National Water Science and Technology Project ; National Water Science and Technology Project ; National Water Science and Technology Project ; National Water Science and Technology Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; National Water Science and Technology Project ; National Water Science and Technology Project ; National Water Science and Technology Project ; National Water Science and Technology Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; National Water Science and Technology Project ; National Water Science and Technology Project ; National Water Science and Technology Project ; National Water Science and Technology Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; National Water Science and Technology Project ; National Water Science and Technology Project ; National Water Science and Technology Project ; National Water Science and Technology Project
源URL[http://ir.ihb.ac.cn/handle/342005/27666]  
专题水生生物研究所_水环境工程研究中心
通讯作者Song, Kang
作者单位1.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Hubei, Peoples R China
2.Nanjing Inst Environm Sci, Minist Environm Protect, Nanjing 210042, Jiangsu, Peoples R China
3.Univ Technol Sydney, Sch Civil & Environm Engn, Ctr Technol Water & Wastewater, Ultimo, NSW 2007, Australia
4.Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China
推荐引用方式
GB/T 7714		 Wu, Yuqi,Song, Kang,Sun, Xiaoyan,et al. Effects of free nitrous acid and freezing co-pretreatment on sludge short-chain fatty acids production and dewaterability[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019,669:600-607.
APA Wu, Yuqi.,Song, Kang.,Sun, Xiaoyan.,Li, Lu.,Wang, Wenlin.,...&Wang, Dongbo.(2019).Effects of free nitrous acid and freezing co-pretreatment on sludge short-chain fatty acids production and dewaterability.SCIENCE OF THE TOTAL ENVIRONMENT,669,600-607.
MLA Wu, Yuqi,et al."Effects of free nitrous acid and freezing co-pretreatment on sludge short-chain fatty acids production and dewaterability".SCIENCE OF THE TOTAL ENVIRONMENT 669(2019):600-607.

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来源：水生生物研究所

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