直接接触式膜蒸馏处理假发废水的研究

针对假发废水处理中存在的问题，设计了膜蒸馏处理工艺．研究了进料液温度、流量、p H、表面活性剂浓度及操作时间对直接接触式膜蒸馏(Direct contact membrane distillation,DCMD)渗透通量和截留率的影响，同时对被污染膜进行了表征和清洗．结果表明，在进料温度为60.0℃，进料流速为120 L·h^-1，冷却水流量为60 L·h^-1，进料液p H为1.48的条件下运行100 h后，渗透通量约为66.0 kg·m^-2·h^-1，并保持99.25%以上的截留率，产水p H为6.82，化学需氧量(Chemical oxygen demand,COD)和总溶解固体量(Total dissolved solids,TDS)未检出，产水满足排放标准．采用直接接触式膜蒸馏处理假发废水具有可行性．

Direct Contact Membrane Distillation to Treat Wig Wastewater

The process of membrane distillation to aim at treating the wig wastewater was designed.The effects of feed temperature, feed flow rate, feed pH, surfactant concentration in feed, running time on permeation flux and rejection of direct contact membrane distillation (DCMD) were investigated. Meanwhile, the contaminated membrane was characterized and cleaned. The results showed that the permeation flux is about 66 kg/m2·h and the rejection rate is above 99.25% after running for 100 hours under the condition that the feed temperature is 60 ℃, the feed flow rate is 120 L/h, the cooling water flow rate is 60 L/h, and the feed pH is 1.48. The pH of the produced water was 6.82, COD and TDS are not detected. The produced water meets the regulations of the emission. It is feasible to treat the wig treatment by DCMD.