Fouling and Cleaning of Gas‐Filled Membranes for Cyanide Removal
Fouling and Cleaning of Gas‐Filled Membranes for Cyanide Removal
复制标题
用于去除氰化物的充气膜的污垢和清洁
DOI：
10.1081/ss-200053315
复制
发表时间：
2005
影响因子：
2.8
通讯作者：
Ranil Wickramasinghe
中科院分区：
文献类型：
--
作者：
B. Han;Zhi;Ranil Wickramasinghe
摘要 介绍了在中国的一个中试工厂中使用充气中空纤维膜去除两种工业废水中氰化物的实验结果。该工厂使用 1000 L 进料溶液以间歇模式运行。该工厂包含 10 个中空纤维模块，总有效膜表面积为 180 平方米。汽提流由 10% NaOH 溶液组成。氰化物的总传质系数通过实验确定。由于膜结垢，实际废水的总传质系数随着时间的推移而降低。特别是，废水中颗粒物的存在会导致总体传质系数显着降低，从而导致氰化物去除率显着降低。为了使膜再生，研究了各种清洁策略。当与工业废水一起使用时，充气膜可以连续运行两个多月保持稳定。
Abstract Results of an experiment on the removal of cyanide from two industrial wastewaters by using gas‐filled hollow fiber membranes in a pilot plant in China are presented. The plant was operated in batch mode using 1000 L of feed solution. The plant contained 10 hollow fiber modules with a total effective membrane surface area of 180 m2. The strip stream consisted of a 10% NaOH solution. The overall mass transfer coefficient for cyanide was determined experimentally. A decrease in the overall mass transfer coefficient with time was observed for real wastewaters due to fouling of the membrane. In particular, the presence of particulate matter in the wastewater can lead to a significant decrease in the overall mass transfer coefficient and, hence, the rate of cyanide removal. Various cleaning strategies were investigated in order to regenerate the membrane. The gas‐filled membranes were stable for over two months of continuous operation when they were used with industrial wastewaters.