膜科学与技术

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Combined flocculation/ceramic ultrafiltration process using in the pilot study of micro-polluted surface water treatment

Authors： WANG Zongheng, YU Binwei, ZHANG Xiaotong, ZHANG Lianjian,GUANG Liang, SHEN Fanfan, WAN Jiwei, TANG Zhilan,CHANG Dongjie,XU Dekan, ZHOU Xing, PENG Wenbo

Units： Jiangsu Jiuwu High-Tech Co., Ltd.

KeyWords： ceramic ultrafiltration membrane; flocculation; micro-polluted surface water; water production flux

ClassificationCode：TQ051

year,volume(issue):pagination： 2024,44(5):156-163

Abstract：

The effect of flocculation/ultrafiltration combined process based on ceramic ultrafiltration membrane on the treatment of micro-polluted surface water was studied. The experimental results show that both the dosage of flocculant and the temperature of raw water are the key factors affecting the treatment capacity of the system. The temperature and the flux of water production show a linear trend, that is, the flux of water production decreases about 2.98 L/（m2·h） when the temperature decreases by 1 ℃. The transmembrane pressure is also a key factor affecting the flux. Higher transmembrane pressure increases the membrane flux, but also causes the rapid formation of periodic intimal pollution. The pilot test results show that the effluent turbidity of flocculation/ultrafiltration combined process is 0.1 NTU, the turbidity removal rate is 98.8%, the permanganate index removal rate is 14.02%, and the microbial index meets the sanitary standard of drinking water. In addition, the system maintains good performance in long-term operation, and the average membrane water production flux can reach 155 L/（m2·h） at a constant pressure of 0.1 MPa. The application of the combined flocculation/ultrafiltration process in surface water treatment is realized, and the high treatment flux and water quality are guaranteed.

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AuthorIntro：

王宗恒（1986-），男，山东济南人，工程师，主要研究方向为膜法水处理技术.*通讯作者，E-mail： pengwenbo@jiuwu.com

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