DOI: 10.1016/j.watres.2018.04.050
Scopus记录号: 2-s2.0-85047383858
论文题名: Chemical cleaning-associated generation of dissolved organic matter and halogenated byproducts in ceramic MBR: Ozone versus hypochlorite
作者: Sun H. ; Liu H. ; Han J. ; Zhang X. ; Cheng F. ; Liu Y.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 140 起始页码: 243
结束页码: 250
语种: 英语
英文关键词: Ceramic membrane bioreactor
; Dissolved organic matter
; Halogenated byproducts
; On-line chemical cleaning
; Ozone
; Sodium hypochlorite
Scopus关键词: Biogeochemistry
; Biopolymers
; Bioreactors
; Byproducts
; Ceramic materials
; Ceramic membranes
; Chlorine compounds
; Dissolution
; Halogenation
; Molecular weight
; Organic compounds
; Ozone
; Sodium compounds
; Toxicity
; Developmental toxicity
; Dissolved organic matters
; Humic acid-like substances
; Membrane bioreactor
; Membrane permeability
; On-line chemical cleanings
; Principal Components
; Sodium hypochlorites
; Chemical cleaning
; biopolymer
; chlorine
; dissolved organic matter
; humic acid
; hypochlorite sodium
; ozone
; total organic chlorine
; unclassified drug
; activated sludge
; bioreactor
; byproduct
; ceramics
; chemical compound
; chemical method
; dissolved organic matter
; membrane
; molecular analysis
; ozone
; polymer
; protein
; activated sludge
; Article
; bioassay
; ceramics
; chemical cleaning
; cleaning
; controlled study
; developmental toxicity
; embryotoxicity
; membrane permeability
; molecular weight
; Polychaeta
; priority journal
; supernatant
; Polychaeta
英文摘要: This study characterized the dissolved organic matter (DOM) and byproducts generated after the exposure of activated sludge to ozone and NaClO in ceramic MBR. It was found that NaClO triggered more significant release of DOM than ozone. Proteins with the molecular weight greater than 20 kDa and humic acid like-substances were the principal components of DOM generated by NaClO, while ozone was found to effectively degrade larger biopolymers to low molecular weight substances. The results showed that more than 80% of DOM generated by NaClO and ozone could pass through the 0.2-μm ceramic membrane. Furthermore, total organic chlorine (TOCl) was determined to be the principal species of halogenated byproducts in both cases, while the generation of TOCl by NaClO was much more significant than that by ozone. Only a small fraction of TOCl was removed by the 0.2-μm ceramic membrane. More importantly, the toxic bioassays further revealed that the supernatant of sludge suspension and permeate in the MBR with NaClO cleaning exhibited higher developmental toxicity to the polychaete embryos than those by ozone. The results clearly showed that on-line chemical cleaning with ozone should be a more eco-friendly and safer approach for sustaining long-term membrane permeability in ceramic MBR. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112713
Appears in Collections: 气候减缓与适应
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作者单位: School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore; Advanced Environmental Biotechnology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, Singapore, 637141, Singapore; Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Hong Kong; Institute of Resources and Environmental Engineering, Shanxi University, Taiyuan, 030006, China
Recommended Citation:
Sun H.,Liu H.,Han J.,et al. Chemical cleaning-associated generation of dissolved organic matter and halogenated byproducts in ceramic MBR: Ozone versus hypochlorite[J]. Water Research,2018-01-01,140