Control ultrafiltration membrane fouling in Chlorella-laden water treatment by integrated heat-activated peroxydisulfate pre-oxidation and coagulation treatment

文献类型: 外文期刊

第一作者: Huang, Weiwei

作者: Huang, Weiwei;Lv, Weiwei;Yang, Hang;Yuan, Quan;Zhou, Wenzong;Huang, Weiwei;Lv, Weiwei;Yang, Hang;Yuan, Quan;Zhou, Wenzong;Liu, Junxia;Li, Tian

作者机构:

关键词: Coagulation; Heat-activated peroxydisulfate; Membrane fouling; Microalgae; Interaction energy

期刊名称:ENVIRONMENTAL RESEARCH ( 影响因子:7.7; 五年影响因子:7.7 )

ISSN: 0013-9351

年卷期: 2024 年 263 卷

页码:

收录情况: SCI

摘要: The membrane fouling induced by algal extracellular organic matter (EOM) remain a bottleneck in restricting ultrafiltration (UF) application during harmful algal-water treatment. In current study, the application of heat-activated peroxydisulfate (PMS) and coagulation (Aluminum chlorohydrate, PACI) on membrane fouling behavior during Chlorella-laden water treatment was investigated. The membrane fouling mechanism was analyzed using the extended Derjaguin-Landau-Verwey-Over-beek (XDLVO) theory. The results revealed that separated heat-activated PMS could enhance the filtration flux of EOM at high PMS does >0.2 mM, whereas the membrane fouling was further alleviated by combined heat-activated PMS (0.2-1.0 mM) and PACI (20 mg/L) treatment, especially at low PMS dose. Combined heat-activated PMS and PACI pretreatment could effectively increase the adhesive repulsion between membrane and foulants and reduce the cohesion free energies between organic foulants than those by separated heat-activated PMS treatment, making the initial filtration flux reduced and the cake layer looser. Moreover, the organic foulants of proteins, polysaccharides, and humic-like organics were removed. Cake formation was the major fouling mechanism when EOM was treated with/without separated heat-activated PMS treatment, whereas the membrane fouling mechanism was changed from cake layer formation to pore blocking after combined heat-activated PMS and PACI treatment. Overall, this research provided a feasible method in membrane fouling control during Chlorella -laden water treatment.

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