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混凝-粉末活性炭吸附-超滤工艺去除砂滤池反洗水溶解性有机物研究

作者：李开伟¹，李伟英²，陆俊宇³，马前³，蒋福春⁴

单位： 1.同济大学生命科学与技术学院, 上海 200092；2. 同济大学长江水环境教育部重点实验室, 上海 200092；3.上海市虹口区环保局, 上海 200092; 4. 苏州自来水公司, 苏州 215002

关键词：溶解性有机物; 混凝；粉末活性炭吸附；砂滤池反洗水；浸没式超滤膜

DOI号：

分类号： X703.1

出版年,卷(期):页码： 2011,31(4):60-64

摘要：

通过混凝-粉末活性炭（PAC）吸附-浸没式超滤膜(UF)联用工艺去除砂滤池反洗水（FBWW）中溶解性有机物（DOM），以降低后续回用过程中消毒副产物（DBPs）生成量。试验对3种混凝药剂聚合硫酸铁(PFS)、三氯化铁（FeCl3）、聚合氯化铝(PACl) 处理FBWW的效果进行了比较，探讨其对UV254和DOC的去除效果。结果表明：PFS对有机物去除效果优于PACl和 FeCl3；PFS与粉末活性炭混合投加可增加有机物去除率，粉末活性炭为20mg/L，PFS为8mg/L时出水浊度为0.85NTU，UV254和DOC去除率分别为43%和31%；采用混凝-PAC吸附-超滤膜（UF）处理FBWW对UV254和DOC去除率分别达到51%和41%，出水浊度为0.19NTU，UV254为0.031cm-1，DOC为2.76mg/L。此工艺可有效降低反冲洗水中DOM含量，达到重复利用净水厂废水的目标。

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 .

基金项目：

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)

作者简介：

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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