Comparison of fouling characteristics of two different poly-vinylidene fluoride microfiltration membranes in a pilot-scale drinking water treatment system using pre-coagulation/sedimentation, sand filtration, and chlorination
Comparison of fouling characteristics of two different poly-vinylidene fluoride microfiltration membranes in a pilot-scale drinking water treatment system using pre-coagulation/sedimentation, sand filtration, and chlorination
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DOI：
10.1016/j.watres.2007.12.011
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发表时间：
2008-04-01
期刊：
影响因子：
12.8
通讯作者：
Watanabe, Yoshimasa
中科院分区：
文献类型：
--
作者：
Chae, So-Ryonq;Yamamura, Hiroshi;Watanabe, Yoshimasa
两个中试规模的混合水处理系统使用两种不同的聚偏二氟乙烯 (PVDF) 微滤 (MF) 膜（即对称膜和复合膜），在 104.2l m(-2) h(-1) (= 2.5 md(-1)) 的恒定渗透通量下运行，并经过预混凝/沉淀、砂滤 (SF) 和氯化，从地表水生产饮用水。浑浊度被完全去除。中试规模的膜系统很好地去除了腐殖质、Al和Fe。为了控制微生物生长并减轻膜污染，在到达两个膜之前将 NaOCl 溶液注入 SF 的流出物中（预氯化）。然而，由于Al、Fe、Mn等无机物质的氧化和吸附，它对膜污染产生不利影响。在下一次运行中，在反洗（氯化后）期间引入 NaOCl。与预氯化的结果相比，这种变化使对称膜和复合膜的运行周期分别从约10天和50天增加到约60天和200天。 (C) 2007 Elsevier Ltd. 保留所有权利。
Two pilot-scale hybrid water treatment systems using two different poly-vinylidene fluoride (PVDF) microfiltration (MF) membranes (i.e. symmetric and composite) were operated at a constant permeate flux of 104.2l m(-2) h(-1) (= 2.5 md(-1)) with a pre-coagulation/sedimentation, sand filtration (SF), and chlorination to produce potable water from surface water. Turbidity was removed completely. And humic substances, Al, and Fe were removed very well by the pilot-scale membrane system. To control microbial growth and mitigate membrane fouling, a NaOCl solution was injected into the effluent from SF before reaching the two membranes (pre-chlorination). However, it adversly affected membrane fouling due to the oxidization and adsorption of inorganic substances such as Al, Fe, and Mn. In the next run, the NaOCl was introduced during backwash (post-chlorination). As compared with the result of pre-chlorination, this change increased the operating period of the symmetric and the composite membranes from about 10 and 50 days to about 60 and 200 days, respectively. (C) 2007 Elsevier Ltd. All rights reserved.