PAFC及其复配PDMDAAC强化混凝处理西北黄土塬集雨窖水

Research on Cellar Water Enhanced Coagulation by PAFC and Its Compound with PDMDAAC in Loess Plateau

针对西北黄土塬地区集雨窖水所具有的含浊低温微污染的水质特征,采用PAFC及其复配PDMDAAC进行强化混凝实验,实验考察了影响混凝效果的主要因素.结果表明:在PAFC的最佳投量为60 mg/L,混合搅拌强度200 r/min,搅拌0.5 min,絮凝搅拌强度50 r/min,絮凝10 min,静沉15 min的条件下,浊度、ρ(CODMn)和UV254的去除率分别为94.8%、58.7%和33.1%;混凝剂PAFC与助凝剂PDMDAAC的复配可强化混凝的效果,当PDMDAAC的最佳投量为0.2 mg/L时,ρ(CODMn)和UV254的去除率分别可提高6.7%和7.2%.

Based on the turbidity, lower temperature and micropollution of the cellar water in loess plateau, the PAFC coagulant effect on cellar water is discussed. The results show that under the conditions of PAFC dosage of 60 mg/L, the mixed-stirring rate of 200 r/min, the stirring time of 0. 5 min, the flocculation-stir- ring rate of 50 r/min, the stirring time of 10 minutes and the settling time of 15 minutes, the main influential elements influence are investigated and the best parameters are definited. The PAFC can remove not only the turbidity but also the organic matter such as p（COI）Mn） and UVzu. The best result is obtained when the removal rate of turbidity,ρ（COEMn） and UV254 reaches 94. 8%.58. 7% and 33. 1%,respectively. Adding polymer flocculant （PDMDAAC） has enhanced the effect of raw water, and the remove effect of coagulation PAFC can be improved when coagulant and flocculant are compounded. When PDMDAAC floccuant dosage is 0. 2 mg/L,ρ（CODMn） and UV254 removal rate can increase 6. 7 percent and 7. 2 percent, respectively.