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Study on Relieving Membrane Fouling of Hybrid Process of PAC Four-stage Countercurrent Adsorption and Microfiltration by Dosing FeCl3

Authors： YU Jinshan1, LI Jing2, GUO Junke 1, WANG Dan2,ZhANG Guanghui2,GU Ping2

Units： 1. Electric power research institute ，National grid Tianjin electric power company, Tianjin 300010 2. School of Environmental Science and Engineering，Tianjin University，Tianjin 300072

KeyWords： powdered activated carbon; secondary effluent; four-stage countercurrent adsorption; membrane cleaning; membrane fouling

ClassificationCode：x703.1

year,volume(issue):pagination： 2016,36(6):108-112

Abstract：

The experiment on hybrid process of PAC four-stage countercurrent adsorption and microfiltration for treating municipal secondary effluent existed serious membrane fouling phenomenon. When the secondary effluent with a volume of 172.8 L was treated, membrane specific flux (SF) fell by 79.59%. The membrane was analyzed after the experiment, filter cake layer resistance was 70.3% of the total membrane resistance. The filter cake layer formed by PAC and suspended solids in the secondary effluent was the main cause of SF declining rapidly. In order to solve the membrane fouling problem, a certain concentration of FeCl3 was dosed into the reactor. The experiment results indicated that when dosing 10-20 mg/L of FeCl3 and treating more than 300 L of water, SF maintained at more than 20 L/ (m2•h•mH2O), SF decreased slowly, the reactor could be operated steadily. In addition, it has positive effect on the removal of organics when dosing FeCl3, concentration of DOC in the effluent reduced slightly.

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AuthorIntro：

第一作者简介：于金山（1979-），男，吉林省松原市人，工程师，从事环境与水处理研究，E-mail：pinfan10@126.com. *通讯作者：E-mail：pinfan10@126.com.

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