DOI: 10.1016/j.watres.2018.01.073
Scopus记录号: 2-s2.0-85041693512
论文题名: Impacts of quaternary ammonium compounds on membrane bioreactor performance: Acute and chronic responses of microorganisms
作者: Chen M. ; Zhang X. ; Wang Z. ; Liu M. ; Wang L. ; Wu Z.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 134 起始页码: 153
结束页码: 161
语种: 英语
英文关键词: Membrane bioreactor
; Membrane fouling
; Microbial community
; Pollutant removal
; Quaternary ammonium compound
; Wastewater treatment
Scopus关键词: Ammonium compounds
; Bacteria
; Biological water treatment
; Bioreactors
; Cationic surfactants
; Chlorine compounds
; Efficiency
; Enzyme activity
; Enzyme inhibition
; Membrane fouling
; Pollution
; Storm sewers
; Wastewater treatment
; Biological wastewater treatment process
; Hydraulic retention time
; Membrane bioreactor
; Microbial communities
; Microbial community structures
; Pollutant removal
; Pollutant removal efficiency
; Quaternary ammonium compound
; Activated sludge process
; ammonia
; benzalkonium chloride
; dissolved oxygen
; oxidoreductase
; benzalkonium
; topical antiinfective agent
; activated sludge
; ammonia
; ammonium
; bioreactor
; concentration (composition)
; environmental stress
; enzyme
; enzyme activity
; membrane
; performance assessment
; pollutant removal
; wastewater treatment
; activated sludge
; analytic method
; Article
; chemical oxygen demand
; enzyme activity
; long term exposure
; microbial community
; microorganism
; nonhuman
; priority journal
; retention time
; sample
; waste water management
; water pollutant
; artificial membrane
; bacterium
; bioreactor
; drug effect
; metabolism
; microbiology
; sewage
; Pseudomonas
; Ammonia
; Anti-Infective Agents, Local
; Bacteria
; Benzalkonium Compounds
; Bioreactors
; Membranes, Artificial
; Sewage
英文摘要: Quaternary ammonium compounds (QACs) are emerging contaminants with the extensive applications in a variety of fields. However, little is known about their potential impacts on activated sludge and performance of biological wastewater treatment processes. In this work, the effects of benzalkonium chloride (BAC, a kind of QACs) on acute and chronic responses of microorganisms and on MBR performance were systematically investigated. The results showed that a low concentration (0.5–2.0 mg BAC/g SS) caused no significant effects on activated sludge property. In contrast, an elevated concentration of BAC led to severer inhibition on activated sludge and key enzyme activity (e.g., dehydrogenase activity) in both short-term and long-term exposure, thus deteriorating the pollutant removal efficiency. Compared with the control MBR (R1) and the reactor with 0.5 mg/L BAC (R2), the removal efficiency of ammonia in R3 with 5.0 mg/L BAC at identical hydraulic retention time (4.3 h) and sludge retention time (30 d) was decreased, i.e., ammonium removal efficiency in R1∼R3 was 95.4 ± 6.1, 93.4 ± 8.1 and 89.3 ± 17.6%, respectively. Moreover, MBR tests showed that membrane fouling was aggravated in the presence of high-concentration BAC. Long-term exposure to BAC reduced microbial community diversity and enriched the BAC-resistant microbes. For instance, the abundance of Pseudomonas genus in R3 was increased from 0.02% to 14.9% with the increase of operation time. Microbial community structure was changed to resist the environmental stress induced by BAC during long-term exposure, thus decreasing the inhibition effects. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112912
Appears in Collections: 气候减缓与适应
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作者单位: State Key Laboratory of Pollution Control and Resource Reuse, Shanghai Institute of Pollution Control and Ecological Security, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, China; School of Chemical Science and Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, China; State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin, 300387, China
Recommended Citation:
Chen M.,Zhang X.,Wang Z.,et al. Impacts of quaternary ammonium compounds on membrane bioreactor performance: Acute and chronic responses of microorganisms[J]. Water Research,2018-01-01,134