真空膜蒸馏处理发制品废水

采用聚丙烯平板膜组件,利用真空膜蒸馏处理发制品废水。考察了进料温度（45.0~70.0 ℃）、进料流量（60~150 L/h）、透过侧真空度（10.0~85.0 kPa）、废水pH、表面活性剂对膜性能的影响。在冷却水流量60 L/h、进料流量120 L/h、进料温度60.0 ℃、透过侧真空度75.0 kPa、废水pH约1.5的条件下,分别对实际发制品废水和模拟发制品废水进行了36 h的运行测试。实验结果表明：两种废水的平均膜渗透通量分别为32.09 kg/（m²·h）和32.66 kg/（m²·h）,截留率分别保持在99.54%和99.83%以上;产水的pH约为6.8,COD和TDS几乎为0,完全满足《污水综合排放标准》（GB 8978—1996）中的二级排放标准。

Treatment of wastewater from wig production by vacuum membrane distillation

The wastewater from wig production was treated by vacuum membrane distillation （VMD） with polypropylene （PP） flat membrane module. The effects of feeding temperature （45.0-70.0 ℃）,feeding flow （60-150 L/h）,permeate side vacuum （10.0-85.0 kPa）,wastewater pH and surfactant on the membrane performance were investigated. The real and simulated wastewater from wig production were individually treated for 36 h under the conditions of cooling water flow 60 L/h,feeding flow 120 L/h,feeding temperature 60 ℃,vacuum of the permeate side 75.0 kPa and wastewater pH 1.5. The experimental results show that：The average membrane permeate flux of the real and simulated wastewater is 32.09 kg/（m²·h） and 32.66 kg/（m²·h）,the rejection rate is maintained at 99.54% and 99.83%,respectively;The pH of the produced water is 6.8,COD and TDS are almost 0,which fully meet the second grade of national wastewater discharge standard （GB 8978-1996）.