globalchange  > 气候变化事实与影响
DOI: 10.1016/j.watres.2019.02.008
Scopus ID: 2-s2.0-85061822417
Chlorine disinfection significantly aggravated the biofouling of reverse osmosis membrane used for municipal wastewater reclamation
Author: Wang Y.-H.; Wu Y.-H.; Tong X.; Yu T.; Peng L.; Bai Y.; Zhao X.-H.; Huo Z.-Y.; Ikuno N.; Hu H.-Y.
Source Publication: Water Research
ISSN: 431354
Publishing Year: 2019
Volume: 154
pages begin: 246
pages end: 257
Language: 英语
Keyword: Biofouling potential ; Chlorine disinfection ; Membrane fouling ; Microbial community structure ; Reclaimed water ; Reverse osmosis
English Abstract: In reverse osmosis (RO) system for wastewater reclamation, biofouling is an inevitable issue. Chlorine disinfection is commonly used in pretreatment to control biofouling. Some chlorine-resistant bacteria could survive after chlorine disinfection and the microbial community structure in feed water changes significantly, thus leading to the change of biofouling potential. In this study, the effect of chlorine disinfection on the biofouling of RO membrane was investigated using a laboratory cross-flow RO system. Chlorine disinfection inactivated most bacteria in feed water. However, during the operation of RO system, with the increase of chlorine dosage the flux decline became more severe after a period of operation. The final normalized flux after 21 days was 0.27, 0.26, 0.20, and 0.21 with 0, 1, 5, and 15 mg-Cl 2 /L chlorine as pretreatment, respectively. After the operation, the numbers of active bacteria in the foulants on the fouled membrane were on the same level regardless of the chlorine dosage, whereas the thickness of the foulants increased with the chlorine dosage significantly. Additionally, the higher total organic carbon concentration indicated more extracellular polymeric substances (EPS) in foulants. Microbial community structure analysis showed that the abundance and the species number of chlorine-resistant bacteria increased significantly with the chlorine dosage. Typical chlorine-resistant bacteria, including Methylobacterium, Pseudomonas, Sphingomonas, and Acinetobacter, were identified as significantly distinctive genera in the foulants after the pretreatment by 15 mg-Cl 2 /L chlorine. Compared with the bacteria without chlorine disinfection, these remaining bacteria produced more EPS with higher molecular weight, which could be the major contribution to more severe RO membrane fouling after chlorine disinfection. © 2019 Elsevier Ltd
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被引频次[WOS]:11   [查看WOS记录]     [查看WOS中相关记录]
Document Type: 期刊论文
Appears in Collections:气候变化事实与影响

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Affiliation: Environmental Simulation and Pollution Control State Key Joint Laboratory, State Environmental Protection Key Laboratory of Microorganism Application and Risk Control (SMARC), School of Environment, Tsinghua University, Beijing, 100084, China; Kurita Water Industries Ltd., Nakano-ku, Tokyo 164-0001, Japan; Shenzhen Environmental Science and New Energy Technology Engineering Laboratory, Tsinghua-Berkeley Shenzhen Institute, Shenzhen, 518055, China

Recommended Citation:
Wang Y.-H.,Wu Y.-H.,Tong X.,et al. Chlorine disinfection significantly aggravated the biofouling of reverse osmosis membrane used for municipal wastewater reclamation[J]. Water Research,2019-01-01,154
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