摘要：
采用直接微滤和混凝—微滤两种工艺对阴极电泳漆废水进行处理。结果表明:混凝预处理减轻了膜污染,提高了膜的渗透通量;当膜面流速为4 m/s,跨膜压差为0.10 MPa,温度为30℃时,稳定通量从直接微滤的47.8L/(m2.h)提高到264.2 L/(m2.h),远高于超滤膜的通量。与原水直接微滤相比,混凝—微滤组合工艺改善了出水水质,CODCr去除率从67%提高到85%,磷酸盐去除率从37%提高到98%。有效清洗后,膜通量可恢复到初始值的84%。
关键词:
混凝,
微滤,
阴极电泳漆废水,
膜污染
Abstract:
The cathodic electrocoating wastewater from automobile painting-industry has been treated by direct microfiltration and coagulation-microfiltration processes. The results show that coagulation pretreatment could reduce membrane fouling, and increase the permeate flux from 47.8 to 264.2 L/(m2·h).The flux is much higher than that of ultrafiltration. In comparison with direct microfiltration，the combined coagulation-microfiltration process does improve the effluent water quality. The removal rate of COD Cr and phosphate has increased from 67% to 85%, and from 37% to 98%, respectively. With the effective cleaning method, the membrane flux recovers to 84% from the initial value.
Key words:
coagulation,
microfiltration,
cathodic electrocoating wastewater,
membrane fouling
中图分类号:
张进, 孟广耀. 混凝对微滤膜处理阴极电泳漆废水的影响[J]. 工业水处理, 2011, 31(1): 30-36.
Zhang Jin, Meng Guangyao. Effect of coagulation on the treatment efficiency of cathodic electrocoating wastewater with microfiltration membranes[J]. INDUSTRIAL WATER TREATMENT, 2011, 31(1): 30-36.