Evaluation of enhanced coagulation combined with densadeg-ultrafiltration process in treating secondary effluent: Organic micro-pollutants removal, genotoxicity reduction, and membrane fouling alleviation

doi:10.1016/j.jhazmat.2020.122697

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	Evaluation of enhanced coagulation combined with densadeg-ultrafiltration process in treating secondary effluent: Organic micro-pollutants removal, genotoxicity reduction, and membrane fouling alleviation
	Chen, Zhiqiang 1,2; Yang, Boxuan 2; Wen, Qinxue 2; Chen, Chuxiao 2
刊名	Journal of Hazardous Materials
	2020-09-05
卷号	396
关键词	Activated carbon Chlorine compounds Coagulation Membrane fouling Organic pollutants Potassium chloride Ultrafiltration Wastewater reclamation Water conservation Water filtration Water quality Enhanced coagulation Filtration experiments Organic micro-pollutants Polyaluminum chloride Powdered activated carbon Transmembrane pressures Ultra-filtration membranes Ultrafiltration process
ISSN号	03043894
DOI	10.1016/j.jhazmat.2020.122697
英文摘要	Conventional coagulation is widely used as an ultrafiltration membrane pretreatment process in wastewater reclamation, however it shows little ability to reduce organic micro-pollutants (OMPs) and genotoxicity. In this research, powdered activated carbon (PAC) and potassium ferrate were used respectively with polyaluminum chloride (PACl) to enhance coagulation. Filtration experiments of coagulation (CUF), coagulation-adsorption (CAUF) and coagulation-oxidation (COUF) pretreatment combined with densadeg-ultrafiltration processes were conducted under their optimum doses. The effluent water quality of CAUF and COUF could meet the water reuse quality standard for scenic environment use, while total phosphorus in the conventional CUF discharge was higher than the standard. The average removal efficiency of the selected fourteen OMPs was significantly improved by 1.8 times through the CAUF process compared to the CUF process (31.2%), whereas the COUF process (38.4%) showed limited improvement. Prominent reduction of genotoxicity was observed in the CAUF and COUF processes, and the effluent of the CAUF process had the least genotoxicity of 1.0 ± 0.3 μg 4-Nitroquinoline-N-oxide (4-NQO)/L. Moreover, the average transmembrane pressure increasing rate followed the order of CUF (1.5 kPa/d) > COUF (1.1 kPa/d) > CAUF (0.6 kPa/d), indicated that the enhanced coagulation process could relieve membrane fouling effectively. © 2020
WOS研究方向	Engineering ; Environmental Sciences & Ecology
语种	英语
出版者	Elsevier B.V., Netherlands
WOS记录号	WOS:000541924000050
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/115212]
专题	兰州理工大学土木工程学院
作者单位	1.School of Civil Engineering, Lanzhou University of Technology, Lanzhou; 730070, China 2.State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (SKLUWRE, HIT), Harbin; 150090, China;
推荐引用方式 GB/T 7714	Chen, Zhiqiang,Yang, Boxuan,Wen, Qinxue,et al. Evaluation of enhanced coagulation combined with densadeg-ultrafiltration process in treating secondary effluent: Organic micro-pollutants removal, genotoxicity reduction, and membrane fouling alleviation[J]. Journal of Hazardous Materials,2020,396.
APA	Chen, Zhiqiang,Yang, Boxuan,Wen, Qinxue,&Chen, Chuxiao.(2020).Evaluation of enhanced coagulation combined with densadeg-ultrafiltration process in treating secondary effluent: Organic micro-pollutants removal, genotoxicity reduction, and membrane fouling alleviation.Journal of Hazardous Materials,396.
MLA	Chen, Zhiqiang,et al."Evaluation of enhanced coagulation combined with densadeg-ultrafiltration process in treating secondary effluent: Organic micro-pollutants removal, genotoxicity reduction, and membrane fouling alleviation".Journal of Hazardous Materials 396(2020).