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饮用水超滤膜处理中试中的膜污染控制

作者：朱丹，顾平¹＊，王海燕¹，何凤华²，韩涛²

单位： 1.天津大学环境科学与工程学院，天津 300072；2.天津泰达自来水公司，天津 300457

关键词：饮用水；膜污染；反洗；化学强化反洗(CEB)；化学清洗；预氯化

DOI号：

分类号： TU 991.2

出版年,卷(期):页码： 2012,32(4):81-86

摘要：

采用中试规模的压力式超滤膜系统处理水厂的沉淀池出水，对试验期间的膜污染控制技术进行了研究。试验中采用了物理反洗，化学强化反洗(CEB)，化学清洗和预氯化对膜污染进行控制。结果表明：物理反洗工艺对于膜污染的去除效果不明显；CEB是一种物理和化学方法相结合的在线清洗方法，能够有效地恢复膜比通量，平均恢复率达85 %；采用草酸进行化学清洗效果较好，4次清洗膜比通量平均提高了265 L/(h•m2•bar)。对膜反洗水的成分分析表明：铁和溶解性有机物是导致中试系统膜污染的主要因素。预氯化可以有效地减缓膜污染速率。

A pilot-scale low pressure ultrafiltration membrane system was used to treat the finished water from a sedimention tank in the waterworks, and membrane fouling control was investigated. Physical backwashing, chemical enhanced backwash (CEB), chemical cleaning and pre-chlorination were studied for membrane fouling control. Results showed that physical backwashing have a little effect on fouling control, however, CEB, an online cleaning mode could have a great effect on fouling control, and the average recovery rate of specific flux was 85%. The effect of chemical cleaning with oxalic acid was better, after cleaning, the average SF value was increased to 265 L/(h•m2•bar). Pre-chlorination could slow down the fouling rate. In addition, the composition of the eluent was analysed. The results revealed that iron and dissolved organic matter were the major factors for fouling.

基金项目：

作者简介：

朱丹（1987-），女，陕西宝鸡，硕士研究生，从事饮用水膜法处理研究。＊通讯联系人，022-27405059，

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