沸石生物滤池联合海绵铁/石灰石滤池处理微污染水体

Treatment of micro-polluted water by zeolite biological filter combined with sponge iron/limestone filter

针对廊坊市安次区龙河东张务闸处河流微污染问题,构建了沸石生物滤池与海绵铁/石灰石滤池联合处理工艺,考察了联合工艺对COD和TP的去除效果及运行参数。结果表明:海绵铁/石灰石滤池采用均质填充,海绵铁/石灰石体积比为3∶7。联合工艺在COD为72±11 mg/L、TP为1.52±0.53 mg/L、HRT为1.5 h的条件下,COD、TP平均去除率分别为76.51%和85.37%;在常态水质条件(COD 56±10 mg/L、TP 0.65±0.14 mg/L)下,控制HRT为0.8 h时,COD、TP平均去除率分别为89.33%和74.27%,出水COD、TP浓度满足地表水Ⅳ类水标准。

In order to solve the river micro-pollution at Zhangwuzha in the east of Longhe River,Anci District,Langfang City,a combined process of zeolite biological filter and sponge iron/limestone filter was constructed.The removal of COD and TP by the combined process and the optimal operation parameters were investigated.The results show that the sponge iron/limestone filter is homogeneously filled,and the volume ratio of sponge iron/limestone is 3∶7.With an influent COD concentration of 72±11 mg/L,an influent TP concentraiton of 1.52±0.53 mg/L,and HRT of 1.5 h,the average removal rates of COD and TP are 76.51%and 85.37%,respectively,by the combined process.When the combined process was under the normal water quality conditions(COD=56±10 mg/L,TP=0.65±14 mg/L)and the HRT was 0.8 h,the average removal rates of COD and TP are 89.33%and 74.27%,and the effluent COD and TP concentrations meet the class IV water standard of surface water.