混凝对微滤膜处理含磷废水的影响  

Effect of Coagulation on the Performance of Microfiltration in Treating Phosphorus-Containing Wastewater

作　　者：张进[1] 孙宇新[2] 董强[3] 刘杏芹[3] 孟广耀[3] 

机构地区：[1]安徽大学化学化工学院,合肥230039 [2]南京理工大学瞬态物理国家重点实验室,南京210094 [3]中国科学技术大学材料科学与工程系

出　　处：《环境科学》2006年第6期1098-1102,共5页Environmental Science

基　　金：国家重点基础研究发展规划(973)项目(2003CB615700);国家自然科学基金项目(10402041)

摘　　要：采用直接微滤和混凝-微滤2种工艺对高浓度含磷废水进行了处理.结果表明,混凝预处理减轻了膜孔堵塞污染,改善了膜表面沉积层的存在形态,提高了膜的渗透通量;与原水直接微滤相比,混凝-微滤组合工艺改进了出水水质,磷酸盐的去除率从11.0%提高到99.7%,出水满足国家一级排放标准;经过相同方法清洗后,混凝-微滤工艺的膜通量能恢复到初始通量的90%以上,而直接微滤工艺的膜通量只能恢复到初始通量的72%.Treatment of high-concentration phosphorus-containing wastewater produced from automobile painting-industry using microfiltration with and without coagulation pretreatment was studied. The results show that the membrane fouling decreased by reducing the extent of pore plugging and improving the shape of cake layer formed on membrane surface and the permeate flux increased with coagulation as pretreatment. In comparison with direct microfiltration （without coagulation）, pretreatment with lime improves removal of phosphate from 11.0 96 to 99.7 96. The permeate obtained from coagulation and microfiltration can meet the national discharge standard and be reused under very safe conditions. With the same cleaning method, the recovery of permeate flux is approximately 18% greater than that of without coagulation pretreatment, which may be due to the differences in the shape of deposited cake and the extent of irreversible fouling.

关 键 词：混凝 微滤 含磷废水 膜污染 对比试验 

分 类 号：X703.1[环境科学与工程—环境工程] X76