Microcoagulation improved the performance of the UF–RO system treating the effluent from a coastal municipal wastewater treatment plant: a pilot-scale study

IF 2.3 Q2 Environmental Science Journal of Water Reuse and Desalination Pub Date : 2021-01-25 DOI:10.2166/WRD.2021.099
Tong Yu, Chenlu Xu, F. Chen, Haoshuai Yin, Hao Sun, Lihua Cheng, X. Bi
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引用次数: 15

Abstract

Microcoagulation has recently been considered as a promising pretreatment for an ultrafiltration (UF) process from numerous studies. To investigate the effects of microcoagulation on the performance of the UF–reverse osmosis (RO) system treating wastewater with high and fluctuant salinity, different dosages of coagulant (poly-aluminum chloride) were added prior to the UF unit in a pilot-scale UF–RO system for a 10-week period operation. Microcoagulation obviously improved the contaminant removal and cleaning efficiencies, including water backwash, chemical enhanced backwash and cleaning in place processes. Organic fouling was dominated during the initial stage of the RO membrane fouling. The microbial communities of water samples and foulant on the RO membrane were similar to those of seawater and foulant on the RO membranes from seawater RO plants. The microbial community of the foulant on the membrane was similar to that of UF permeate and RO concentrate. These results demonstrated that microcoagulation could improve the performance of the UF–RO system treating the effluent with high and fluctuant salinity from a coastal municipal wastewater treatment plant.
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微混凝改善了UF-RO系统处理沿海城市污水处理厂出水的性能:中试研究
近年来,许多研究都认为微凝是一种很有前途的超滤预处理方法。为了研究微混凝对UF -反渗透(RO)系统处理高盐度和波动盐度废水性能的影响,在UF - RO中试系统中,在UF单元前添加不同剂量的混凝剂(聚合氯化铝),运行10周。微混凝明显提高了污染物去除和清洗效率,包括水反冲洗、化学强化反冲洗和就地清洗。反渗透膜污染初期以有机污染为主。水样的微生物群落和反渗透膜上的污染物与海水和海水反渗透厂反渗透膜上的污染物相似。膜上的微生物群落与超滤渗透液和反渗透浓缩液相似。结果表明,微混凝处理某沿海城市污水处理厂高盐度、波动盐度出水,可提高UF-RO系统的处理性能。
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来源期刊
Journal of Water Reuse and Desalination
Journal of Water Reuse and Desalination ENGINEERING, ENVIRONMENTAL-WATER RESOURCES
CiteScore
4.30
自引率
0.00%
发文量
23
审稿时长
16 weeks
期刊介绍: Journal of Water Reuse and Desalination publishes refereed review articles, theoretical and experimental research papers, new findings and issues of unplanned and planned reuse. The journal welcomes contributions from developing and developed countries.
期刊最新文献
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