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首页> 美国卫生研究院文献>Membranes >Combining Coagulation/MIEX with Biological Activated Carbon Treatment to Control Organic Fouling in the Microfiltration of Secondary Effluent
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Combining Coagulation/MIEX with Biological Activated Carbon Treatment to Control Organic Fouling in the Microfiltration of Secondary Effluent

机译：混凝/ MIEX与生物活性炭处理相结合，可控制次级污水微滤中的有机污垢

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摘要

Coagulation, magnetic ion exchange resin (MIEX) and biological activated carbon (BAC) were examined at lab scale as standalone, and sequential pre-treatments for controlling the organic fouling of a microfiltration membrane by biologically treated secondary effluent (BTSE) using a multi-cycle approach. MIEX gave slightly greater enhancement in flux than coagulation due to greater removal of high molecular weight (MW) humic substances, although it was unable to remove high MW biopolymers. BAC treatment was considerably more effective for improving the flux than coagulation or MIEX. This was due to the biodegradation of biopolymers and/or their adsorption by the biofilm, and adsorption of humic substances by the activated carbon, as indicated by size exclusion chromatography. Coagulation or MIEX followed by BAC treatment further reduced the problematic foulants and significantly improved the flux performance. The unified membrane fouling index showed that the reduction of membrane fouling by standalone BAC treatment was 42%. This improved to 65%, 70%, and 93% for alum, ferric chloride and MIEX pre-treatment, respectively, when followed by BAC treatment. This study showed the potential of sequential MIEX and BAC pre-treatment for controlling organic fouling and thus enhancing the performance of microfiltration in the reclamation of BTSE.
机译：以实验室规模对混凝物，磁性离子交换树脂（MIEX）和生物活性炭（BAC）进行了独立检查，并采用多级生物处理过的二级出水（BTSE）对通过生物处理过的二级出水（BTSE）控制微滤膜的有机结垢进行了连续预处理循环法。尽管不能去除高分子量生物聚合物，但由于更多地去除了高分子量（MW）腐殖质，因此MIEX的通量比凝结效果略强于凝结。 BAC处理在改善通量方面比凝结或MIEX更为有效。如尺寸排阻色谱所示，这是由于生物聚合物的生物降解和/或生物膜对生物聚合物的吸附，以及活性炭对腐殖质的吸附。混凝或MIEX，然后进行BAC处理，进一步减少了有问题的污垢，并显着提高了助焊剂性能。统一的膜污染指数表明，独立的BAC处理减少的膜污染为42％。在进行BAC处理后，明矾，氯化铁和MIEX预处理分别提高到65％，70％和93％。这项研究表明，顺序进行MIEX和BAC预处理可控制有机结垢，从而增强BTSE回收中的微滤性能。

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