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Study on DOM removal of filter backwash water by coagulation-PAC adsorption-submerged UF process

Authors： Li Kaiwei1, Li Weiying 2*,Lu Junyu3, Ma Qian 3 ,Jiang Fuchun4

Units： 1. The college of Life Science and Technology, Tongji University, Shanghai 200092, China; 2, Key Laboratory of Yangtze River Water Environment, Ministry of education, Tongji University,1239 Siping Road, Shanghai 200092, China; 3. Shanghai HongKou Environmental Protection Bureau 200092, Shanghai, China; 4 Suzhou city water company 215002, Suzhou, China

KeyWords： Dissolved organic matter；Coagulation; activated powered carbon adsorption; Filter backwash water; submerged UF

ClassificationCode：X703.1

year,volume(issue):pagination： 2011,31(4):60-64

Abstract：

Coagulation-activated powered carbon (PAC) adsorption-submerged ultrafiltration membrane (UF) process was used to remove dissolved organic matter (DOM) in filter backwash water (FBWW) and disinfections by-products in disinfection process was simultaneously reduced. Three types of coagulation, polyferric sulfate (PFS), ferric chloride (FeCl3), polymeric aluminum (PACl), were compared on the treatment of FBWW. The effects on the UV254 and DOC were studied. The results indicate that: PFS can be more efficient in organic matter removal than PACl and FeCl3; adding activated powered carbon into coagulation process contributes to the removal of pollutants; at dosage 20mg/L of activated powered carbon and 8mg/L of PFS，the residual turbidity is 0.84NTU, the removal rates of UV254 and DOC are 43% and 31%, respectively; 51% of UV254 removal and 41% of DOC removal can be achieved through Coagulation-PAC adsorption-submerged UF process，and turbidity, UV254, DOC of membrane flux of are 0.19NTU, 0.031cm-1，2.76mg/L, respectively .

Funds：

苏州市重点科技支撑项目(ZS0801)；国家水体污染控制与治理科技重大专项课题 (2008ZX07421-006)

AuthorIntro：

李开伟 (1985- )，男，重庆人，硕士研究生，研究方向为水处理理论与膜处理技术 E-mail: lkw2010gmial.com 通讯作者：李伟英 (1968- )，女，博士，副教授，研究方向为水处理理论与膜处理技术，电话：13601895068， E-mail :123lwyktz@tongji.edu.cn。

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