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Evaluating an on-line cleaning agent for mitigating organic fouling in a reverse osmosis membrane
Chemosphere ( IF 5.778 ) Pub Date : 2021-02-22 , DOI: 10.1016/j.chemosphere.2021.130033
Sanghun Park; Seok Min Hong; Jongkwan Park; Sunam You; Younggeun Lee; Eunggil Kim; Kyung Hwa Cho

Cleaning-in-place (CIP) is a representative fouling management process from which the filtration performances of fouled membranes can be recovered. However, CIP can cause significant inefficiency in water production because frequent system restabilization is necessary for cleaning processes. This study applied a newly developed on-line cleaning agent (OCA, a feed water additive for fouling mitigation), to reduce the number of CIP by enhancing water productivity. Reverse osmosis filtration was performed to evaluate the effect of on-line cleaning on the mitigation of organic fouling originating from humic acid (HA) and bovine serum albumin. OCA increased the permeate flux in proportion to OCA concentration. In particular, OCA effectively reduced the fouling layer thickness by 22% when fouling was influenced by HA–Ca2+ complexation, increasing water production by 5%. It also had a minor influence on bovine serum albumin fouling, producing a 1.4% increase in permeate flux. Furthermore, the pore blockage-cake filtration model was used to evaluate OCA cleaning performance through the reduction in fouling layer resistance and the growth parameter. The results demonstrated the advantages of OCA utilization for mitigating cake layer development. These findings imply that OCA can be an effective cleaning additive, especially in seawater and groundwater treatment processes with a high proportion of HA and calcium ions.



中文翻译:

评估用于减少反渗透膜中有机污垢的在线清洁剂

就地清洗(CIP)是一种代表性的结垢管理过程,可从中恢复结垢膜的过滤性能。但是,CIP可能会导致水的生产效率显着降低,因为清洗过程需要频繁的系统再稳定化。这项研究应用了一种新开发的在线清洁剂(OCA,一种用于减轻结垢的给水添加剂),以通过提高水生产率来减少CIP的数量。进行了反渗透过滤,以评估在线清洗对减轻源自腐殖酸(HA)和牛血清白蛋白的有机污垢的影响。OCA与OCA浓度成正比地增加了渗透通量。特别是,当HA-Ca 2+对结垢产生影响时,OCA可将结垢层厚度有效降低22%络合,将产水量提高5%。它还对牛血清白蛋白结垢影响较小,使渗透通量增加1.4%。此外,使用毛孔阻塞滤饼过滤模型通过降低结垢阻力和生长参数来评估OCA清洁性能。结果证明了利用OCA减轻蛋糕层发展的优势。这些发现表明,OCA可以是一种有效的清洁添加剂,尤其是在含有大量HA和钙离子的海水和地下水处理过程中。

更新日期:2021-03-03
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