混凝沉淀法去除饮用水中痕量磷的试验  

Study on the Trace Phosphorus Removal in Drinking Water by Coagulating Sedimentation Method

作　　者：李亚峰[1] 李辉洋[1] 刘莎[1] 

机构地区：[1]沈阳建筑大学市政与环境工程学院,辽宁沈阳110168

出　　处：《沈阳建筑大学学报（自然科学版）》2012年第1期140-144,共5页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家十一五科技支撑计划项目(2006BAJ06B07);住房和城乡建设部科技攻关项目(2007-K7-15);辽宁省教育厅科技攻关项目(2008D288)

摘　　要：目的去除饮用水中的痕量磷,优选饮用水除磷混凝剂,并对混凝除磷的影响因素进行研究.方法应用六联搅拌机对比研究三氯化铁、聚合硫酸铁、聚合氯化铝、聚合氯化铝铁以及硫酸亚铁对饮用水中痕量磷的去除效果,并分析pH值、水温、水中共存离子对最佳混凝剂除磷效果的影响.结果 FeCl3和PFS对饮用水中痕量磷的去除效果最好,在混凝剂投入量为15 mg/L,pH值为6～7,温度在5～25℃时,饮用水中的磷能够从80μg/L降到3μg/L以下;温度在35℃时除磷难以达到饮用水生物稳定的限制范围,通过提高混凝剂的投加量能够保证除磷效果满足要求;SO42-、Cl-对除磷影响小,CO32-对除磷效果有一定干扰,通过调节原水pH值可以降低其干扰.结论 FeCl3和PFS对饮用水中痕量磷具有理想的去除效果,处理后的水满足饮用水生物稳定的限制范围.The paper is to remove the trace phosphorus in drinking water. The optimum coagulants in removal of phosphorus were chose and the influence factors of phosphorus removal were researched. Ferric trichlofide, poly ferric sulfate, poly aluminum chloride, poly aluminum-ferric chloride and ferrous sulphate were chose as testing coagulants, using six league muddler the trace phosphorus removal efficiencies by this coagulants were compared and the effect of pH value, water temperature, coexisting ions to the best coagulants were analyzed. The results show that ferric trichloride and poly ferric sulfate are the best coagulants in drinking water trace phosphorus removal, when the coagulant dosage is 15mg/L,pH value from 6 to 7, temperature from 5 to 25 ℃, the concentration of phosphorus in drinking water can keep under below 80p, g/L to 3μg/L. At the temperature about 35℃, the phosphorus removal rate can not reach the biological stability limited field, raising coagulant dosage can ensure phosphorus removal requirement. SO42- and C1- have small influence in removal of phosphorus. CO32- has some influence in removal of phosphorus ,adjusting the raw water pH value can reduce the interference. The conclusion is that ferric trichloride and poly ferric sulfate have ideal effect on drinking water phosphorus removal, and the treated water can reach limited standard range for drinking water biological stability.

关 键 词：饮用水 混凝沉淀 痕量磷 影响因素 

分 类 号：TU991.21[建筑科学—市政工程]