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Effect of dissolved organic matter in secondary effluent on pollution on ultrafiltration membrane
Author(s): 
Pages: 145-149
Year: Issue:  11
Journal: Water & Wastewater Engineering

Keyword:  超滤膜膜污染溶解性有机物有机物分级;
Abstract: 利用XAD-8/XAD-4树脂将污水处理厂二级出水中的溶解性有机物(DOM)分为疏水性有机酸(HPO-A)、疏水性中性有机物(HPO-N)、过渡亲水性有机酸(TPI-A)、过渡亲水性中性有机物(TPI-N)和亲水性有机物(HPI),研究其对PVDF超滤膜污染性能的影响.结果表明,二级出水中DOM对超滤膜污染的顺序为疏水性有机物>过渡性亲水性有机物>亲水性有机物.二级出水的五种组分中,重均分子量(Mw)呈现出HPO-A>TPI-A>HPO-N> HPI>TPI-N的趋势,说明分子量大小与膜污染成正比.有机物对膜的污染程度和膜对有机物的去除率相关性不大.反洗对超滤膜去除有机污染的效果良好,特别是NaOH+NaClO的混合反洗水对有机污染物的去除效果最好,能够使膜的比通量恢复率达到58%.
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