膜科学与技术

凹凸棒土-MBR组合工艺处理微污染水源水的效能与机理?

作者：时文歆，段英随，张冰，衣雪松

单位：哈尔滨工业大学城市水资源与水环境国家重点实验室哈尔滨 150090

关键词：膜生物反应器；凹凸棒土；微污染水源水

出版年,卷(期):页码： 2016,36(2):96-101

摘要：

将吸附能力强的粘土晶体矿物凹凸棒土应用于膜生物反应器（MBR）中，对比研究了常规MBR与凹凸棒土-MBR组合工艺处理微污染水源水的效能，结果表明二者均能有效去除CODMn、NH4+-N、UV254、TOC和浊度。系统长期运行过程中，凹凸棒土-MBR组合工艺的膜污染程度明显低于传统MBR系统。凹凸棒土-MBR的污泥混合液粒径要小于MBR工艺，其Zeta电位比MBR低11%-34%。傅里叶变换红外光谱（FTIR）表明凹凸棒土的投加使MBR污泥混合液及其膜表面滤饼层中的有机物的结构和组成发生了一定的变化，有机物的种类和含量减少，提高了MBR去除有机污染物的效能降低了膜有机污染。三维荧光光谱（EEM）表明凹凸棒土-MBR工艺对于引起膜污染的污染物降解性能优于MBR工艺。

Attapulgite clay，a kind of hydrated magnesium aluminum silicate mineral，has a perfect sorptive quality. In this paper, the effect of attapulgite clay dosed to a MBR-attapulgite clay system was studied, besides compared experiments between the conventional MBR and MBR-attapulgite clay system for disposing the micro-polluted water were carried out and the basic performance of those two MBRs was investigated. The results demonstrated that both of MBRs could remove CODMn, ammonia, UV254, TOC, and turbidity successfully. The membrane fouling in MBR-attapulgite clay system was much slighter than that in MBR system. The sludge mixture particle size in MBR-attapulgite was much smaller size than that in the MBR. Moreover, and the Zeta potential of sludge mixture in MBR-attapulgite clay system was about 11–34% lower than that in MBR. FT-IR indicated that the structure and composition of the organic matter in the mixture liquor were changed by dosing attapulgite. Moreover, the types and content of organic matter were also reduced, and the efficiency of removing organic contaminants was enhanced and thus membrane organic pollution was reduced. Excitation–emission matrix (EEM) analysis proved that pollutants degradation performance in MBR-attapulgite clay system was better than that in MBR.

第一作者简介：时文歆（1970-），男，河南人，博士，教授，博士生导师，从事膜分离技术的研究. Email: swx@hit.edu.cn

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