【摘要】 利用两种混合基质(蛭石+高炉渣、陶粒+高炉渣)构建模拟垂直流人工湿地处理化粪池出水,运行1a试验结果表明,蛭石+高炉渣基质对总鳞(TP)、总氮(TN)、NH4+-N、CODCr的去除效果要好于陶粒+高炉渣系统,而且其4个组合系统对TP、TN、CODcr、NH4+-N去除率分别大于71%、2.5%、61%、65%;水力学负荷比污染物的去除率存在密切关系:CODcr、NH4+-N、TP在水力负荷较小(30.6cm/d)时的去除率比水力负荷61.2cm/d下高;而种植美人蕉的蛭石+高炉渣组合在水力负荷为30.6cm/d,停留时间为0.848d时的处理效果较好,其对NH4+-N、TP、CODcr的去除率分别为94.51%、89.13%、66.46%,均达到了《城镇污水处理厂污染物排放标准》(GB18918-2002)一级B标准。更多还原

【Abstract】 Two mixed substrates of vermiculite-slag and ceramic-slag were used in simulating vertical-flow constructed wetland for treating septic tanks effluent.The one-year operation results indicated that the purifying efficiencies of total nitrogen(TN),CODCr,NH4 +-N and total phosphorus(TP)by mixed substrate of vermiculite-slag were better than those of ceramic-slag,of which removal efficiencies of TP,TN,CODCr and NH4 + -N were higher than 71%,2.5%,61%and 65%,respectively.The hydraulic loading rate played a significant role in the wastewater purifying efficiency,and 30.6 cm·d -1 was the better loading rate for removing CODCr,NH4 + -N and TP than 61.2 cm·d -1 ,.In addition,mixed substrate of vermiculite-slag,with cannas planted,under hydraulic loading rate of 30.6 cm·d -1 ,and hydraulic retention time of 0.848d could achieve highest removal efficiencies of NH4 + -N,TP and CODCr,namely 94.51%,89.13%and 66.46%,respectively,which could all meet the first class B standards of Urban Waste Water Treatment Plant Pollutant Discharge Standard(GB18918-2002).更多还原