电镀综合废水对DF膜的污染

DF membrane fouling caused by electroplating comprehensive wastewater

江苏某电镀厂的电镀综合废水在采用DF膜进行预处理时,膜易受到污染。针对这一问题,采用DF膜生产厂家提供的小试装置,研究探索了膜污染的原因及其具体特征。实验结果表明,在处理电镀综合废水时,DF膜的污染速率较快,而酸洗对DF膜的恢复性较好,研究还证实电镀综合废水中的无氰沉锌水洗液是造成DF膜污染的主要原因。

The DF membrane was easily polluted when it was applied for treating electroplating comprehensive wastewater from an electroplating factory in Jiangsu Province. Based on this case,a small scale experiment was carried out to investigate the reasons and characteristics of DF membrane fouling. The equipment was provided by the manufacturer of DF membrane. The experiment results confirm that the DF membrane is easily contaminated by the comprehensive wastewater from the electroplating factory. The regeneration of the DF membrane was well by acid elution. The experiments also prove that the cyanide free zinc deposition wash water is the main reason causing DF membrane fouling.