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    • PFS-PDMDAAC絮凝剂对超滤膜污染的减缓作用

    Aiwen Zhang,Yanzhu Chong,Guixiang Ma

    Industrial Water Treatment（2020）

    Cited 0|Views2
    Abstract
    采用絮凝-超滤组合工艺处理低温低浊水,考察了聚合硫酸铁-聚二甲基二烯丙基氯化铵(PFS-PDMDAAC)絮凝剂对低温低浊水的絮凝效果,分析了pH、Zeta电位、絮凝指数、分形维数及絮体的抗破碎能力等絮凝特征,并考察了絮凝对超滤膜污染的影响作用.结果表明:PFS-PDMDAAC对有机物、浊度的去除率明显高于PFS,且对pH的适用范围更广,絮体结构更加密实;PFS-PDMDAAC对芳香族蛋白类有机物和溶解性微生物代谢物有明显的去除效果.当搅拌速度分别为200、300 r/min,破碎絮体的再絮凝恢复程度较好;随着破碎次数增多,絮体的恢复能力未明显减弱.PFS-PDMDAAC的絮凝作用可有效减缓膜通量的衰减速率.
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