基于铁炭法的自来水厂进水突发性磷污染控制技术研究

STUDY ON CONTROL TECHNOLOGY FOR EMERGENT PHOSPHORUS POLLUTION IN INFLOW FROM WATERWORKS BASED ON IRON-CARBON METHOD

采用铁炭法对自来水厂进水突发性磷污染的去除进行研究,考察了主要影响因素和可行性。结果表明,在100 m L浓度为1.0 mg/L的含磷水中,投加铁炭总量为1.50 g,m（Fe）/m（C）为3∶2,反应时间为60 min时,TP去除率为97%。在此最佳条件下,铁炭法的总铁溶出量最大值为3.86 mg/L,比单独铁屑法高16%。总铁溶出量越多,对总磷的去除效果越好。在此基础上进行动态连续试验,流量为330 m L/h,ρ（TP）〈1.0 mg/L,连续运行2个月后,出水ρ（TP）为0.15~0.20 mg/L,满足饮用水源水标准。该方法在实验室环境下取得了较好的处理效果,具有处理成本低廉,操作简单,以废治废和无二次污染的优点。

Emergent phosphorus pollution in inflow from waterworks was treated by iron-carbon method. The main influence factors and feasibility were investigated. The optimum condition was obtained by using the iron carbon dosage of 1. 50 g,iron and carbon mass ratio of 3 /2,reaction time of 60 min in 100 m L phosphorus water,which resulted in significant efficiency（ 97%）. Under the optimum conditions,the max total iron ions concentration was 3. 86 mg/L,which increased by 16%compared to single scrap iron method. The more total iron dissolution amount was,the better total phosphorus removal effect get. The dynamic continuous experiments are carried out on the basis of single factor experiments. The effluent TP concentration was 0. 15 ~ 0. 20 mg/L which reached the standards of drinking water sources under the condition that the flow rate was 330 m L/h,and the phosphorus was 1. 0 mg/L after running two months. The process achieved good treatment effect on the base of laboratory tests. It not only had the advantages of low cost,simple operation,waste control by waste,and no secondary pollution.