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首页> 美国卫生研究院文献>Membranes >Impact of PAC Fines in Fouling of Polymeric and Ceramic Low-Pressure Membranes for Drinking Water Treatment
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Impact of PAC Fines in Fouling of Polymeric and Ceramic Low-Pressure Membranes for Drinking Water Treatment

机译：PAC细粉对用于饮用水处理的聚合物和陶瓷低压膜结垢的影响

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摘要

This study assessed the issue of membrane fouling in a Hybrid Membrane Process (HMP) due to the export of powdered activated carbon (PAC) fines from a pretreatment contactor. Two parallel pilot-scale ceramic and polymeric membranes were studied. Reversible and irreversible foulings were measured following three cleaning procedures: Physical backwashing (BW), chemically enhanced backwashing (CEB) and Clean-in-Place (CIP). The impacts on fouling of membrane type, operation flux increase and the presence/absence of the PAC pretreatment were investigated. Membranes without pretreatment were operated in parallel as a control. In addition, CIP washwaters samples were analyzed to measure organic and inorganic foulants removed from the membranes. It was observed that for the polymeric membranes, fouling generally increased with the presence of the PAC pretreatment because of the export of fines. On the contrary, the ceramic membranes were not significantly impacted by their presence. The analysis of CIP washwaters showed a greater total organic carbon (TOC) content on membranes with a PAC pretreatment while no similar conclusion could be made for inorganic foulants.
机译：这项研究评估了混合膜工艺（HMP）中膜结垢的问题，这是由于预处理接触器输出了粉状活性炭（PAC）细粉。研究了两种平行的中试规模的陶瓷膜和聚合物膜。按照以下三种清洁程序测量可逆和不可逆结垢：物理反洗（BW），化学增强反洗（CEB）和就地清洁（CIP）。研究了对膜类型结垢，操作通量增加以及是否存在PAC预处理的影响。将未经预处理的膜平行作为对照。此外，对CIP冲洗水样品进行了分析，以测量从膜中去除的有机和无机污垢。观察到对于聚合物膜，由于存在细粉出口，结垢通常随着PAC预处理的存在而增加。相反，陶瓷膜不受其存在的显着影响。 CIP冲洗水的分析表明，采用PAC预处理后，膜上的总有机碳（TOC）含量更高，而对于无机污垢则无法得出类似的结论。

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