Fouling and Cake Behavior of Algal Organic Foulants on Microfiltration Membranes in Various Growth Phases
文献类型： 外文期刊
作者： Huang, Weiwei 1 ; Chu, Huaqiang 2 ; Dong, Bingzhi 2 ;
作者机构： 1.Shanghai Acad Agr Sci, Shanghai, Peoples R China
2.Tongji Univ, Sch Environm Sci & Engn, State Key Lab Pollut Control & Resource Reuse, Shanghai 200092, Peoples R China
关键词： Algogenic organic matter;Biopolymers;Cake layer formation;EEM;Pore plugging
期刊名称：CLEAN-SOIL AIR WATER （ 影响因子：1.77； 五年影响因子：1.955 ）
ISSN： 1863-0650
年卷期： 2016 年 44 卷 12 期
页码：
收录情况： SCI
摘要： This study investigated the fouling behavior of algal organic foulants in various growth phases during microfiltration. The characteristics of the algogenic organic matter (AOM) in various growth phases were also determined to identify the membrane foulants on fouled membranes. The results indicated the stationary phase of the Aphanizomenon flos-aquae and Anabaena flos-aquae AOMs resulted in the most serious filtration flux, followed by their late exponential and primary exponential phases. The amounts of protein/protein-like substances, the neutral hydrophilic fraction, and the macromolecular organics (including molecular weight) increased with cultivation time, potentially attributed to increasing membrane fouling. Analysis of organic hydrophobicity, molecular weight distribution and fluorescence excitation-emission matrix indicated that algal organic accumulation is a dynamic process of algal activity, biopolymers such as protein-like and polysaccharides-like substances were the major components of membrane foulants for the three algal growth phases. Moreover, pore plugging and cake layer formation were the dominant fouling mechanisms in membrane filtration. Timely monitoring of algal growth in water can be important for effectively predicting membrane fouling in microfiltration.
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