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Chemical cleaning of flat sheet ultrafiltration membranes fouled by effluent organic matter

机译：平板超滤膜的化学清洁因流出物有机物质污染

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This paper examines the efficiency of chemical cleaning of flat sheet UF membranes severely fouled by rendering plant secondary effluent. The rendering plant secondary effluent was treated in a laboratory cross-flow batch ultrafiltration (UF) set-up with three membranes (MW, CQ and GM). Effluent organic matter (EfOM) caused a severe fouling, which led to an increase in hydraulic membrane resistance (HMR), 6.5-11.3 times the HMR of pristine membranes (R-m). In the first part, the fouled membranes were flushed with water and cleaned by chemical cleaning in two phases. The first phase included flushing and soaking with a commercial alkali cleaning agent, as in the second phase a commercial acidic cleaning agent was used. After each phase, the HMR was determinate and one membrane was removed and characterized (FTIR and SEM). The chemical cleanliness was determined from the FTIR spectra; while the hydraulic cleaning efficiency (HCE) was determined from the drop in HMR. In the second part, the cleaning was performed with individual. cleaning agents. The alkali agent was tested at 25 degrees C and 35 degrees C as well as after the UF at different pressures. The alkali cleaning agent had the greatest impact on the cleaning of membranes fouled by EfOM. (C) 2017 Elsevier B.V. All rights reserved.
机译：本文通过呈现植物二级流出物检测平板UF膜的化学清洗效率。用三个膜（MW，CQ和GM）在实验室交叉流量批量超滤（UF）设置中处理渲染植物二级流出物。流出物有机物（EFOM）引起严重的污垢，导致液压膜抗性（HMR）的增加，6.5-11.3倍的原始膜（R-M）。在第一部分中，将污垢的膜用水冲洗并通过两相中的化学清洁清洁。第一相包括用商业碱清洗剂冲洗和浸泡，如在第二相中使用商业酸性清洁剂。在每相后，HMR测定，并除去一个膜并表征（FTIR和SEM）。化学清洁度由FTIR光谱测定;虽然液压清洁效率（HCE）由HMR中的下降确定。在第二部分中，用个体进行清洁。清洁剂。在不同压力下，在25℃和35℃下以及35℃下测试碱剂。碱清洗剂对由EFOM污染的膜的清洁产生了最大的影响。 （c）2017 Elsevier B.v.保留所有权利。

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