电凝聚控制MBR膜污染的研究

发布时间：2018-01-15 03:28

本文关键词：电凝聚控制MBR膜污染的研究　出处：《东北大学学报(自然科学版)》2016年03期 　论文类型：期刊论文

【摘要】：试验考察了SECMBR的膜过滤特性,探讨了电凝聚对控制MBR膜污染的作用及机理.试验结果表明:胞外聚合物(EPS)、溶解性代谢产物(SMP)、ζ电位和污泥颗粒粒径等是膜污染的重要影响因素.SECM BR的膜污染远小于SM BR;SECM BR原位溶出铁离子与EPS结合,絮凝性增强,滤饼层污染减轻;SECM BR中电凝聚可降低单位容积活性污泥分泌的SM P与EPS,减轻膜污染;SECM BR降低EPS和SM P中主要污染物蛋白质的比例,减轻膜污染;ζ电位与Rc之间呈负相关,在SMBR与SECMBR中相关度分别为-0.798 8和-0.557 4.SECM BR在电场与铁粒子作用下降低了ζ电位绝对值,减轻了膜污染.
[Abstract]:The characteristics of membrane filtration of SECMBR were investigated, and the effect and mechanism of electrocoagulation on controlling membrane fouling of MBR were discussed. Soluble metabolites such as SMPN, 味 potential and particle size of sludge are the important influencing factors of membrane fouling. The membrane fouling of SECMBR is much smaller than that of SM BRR. In situ dissolution of iron ions from SECM Br combined with EPS, flocculation was enhanced, and filter cake layer pollution was reduced. Electrocoagulation in SECM Br could reduce SMP and EPS secreted by activated sludge per unit volume and reduce membrane fouling. SECM Br reduced the proportion of major contaminant proteins in EPS and SMP and alleviated membrane fouling. There was a negative correlation between 味 potential and RC. In SMBR and SECMBR, the correlations were -0.798 8 and -0.557 4. SECBR decreased the absolute value of 味 potential under the action of electric field and iron particles, respectively. The membrane fouling is alleviated.
【作者单位】：东北大学资源与土木工程学院;
【基金】：国家科技重大专项——水体污染控制与治理(2013ZX07202-010) 大学生创新训练计划项目(140043)
【分类号】：X703
【正文快照】： 膜污染主要分为两类:滤饼层污染和吸附性污染.膜生物反应器中,污染物主要来源是系统中的污泥[1].研究表明,胞外聚合物(EPS)和溶解性代谢产物(SMP)对膜污染有重要影响[2-3].为缓解膜污染,不少学者研究投加絮凝剂对膜污染的减轻作用,但大量絮凝剂的投加会增加生物反应器的盐度,

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