黄土基改性陶粒对雨水径流中污染物的去除效能研究

Research on the Removal Efficiency of Pollutants in Rainwater Runoff by Loess Modified Ceramsite

以黄土与煤矸石为原料,制得黄土基改性陶粒,将其作为渗滤系统的填料,对雨水径流进行污染物去除效能实验。主要监测系统对SS、COD、NH4^+-N、TN及TP的去除效果。结果表明:反应器在进水流量为2.92mL/min,水力负荷为1.75m3/(m3滤料·d)时,对SS、COD、NH4^+-N、TN及TP的去除率分别为98.81%、45.23%、54%、84.21%、67.12%;持续运行后得到反应器的运行稳定时间为10 h,此后出水水质趋于稳定,稳定后SS、COD、NH4^+-N、NO3^--N、NO2^--N、TN及TP的去除率分别为(97.5±0.5)%、(70.53±1.0)%、(73.47±2.0)%、(49.37±2.0)%、(96.45±2.0)%、(71.68±2.0)%、(69.2±2.0)%;黄土基改性陶粒可用于兰州地区初期雨水径流的处理。

Loess and coal gangue were used as main raw materials to prepare loess modified ceramsite,and it was utilized as filtration materials for treatment of rainwater runoff to research the removal efficiency of pollutants.The removal efficiencies of SS,COD,NH4^+-N,TN and TP were the main indexes.The results showed that when the flow rate was 2.92 mL/min and the hydraulic load was 1.75 m3/[m3·d],the removal rates of SS,COD,NH4^+-N,TN and TP were 98.81%,45.23%,54%,84.21%,67.12%,respectively.With continuous operation,the stability time of the reactor was 10 h,and the effluent quality tended to be stable and the removal rates of SS,COD,NH4^+-N,NO3^--N,NO2^--N,TN and TP were(97.5±0.5)%,(70.53±1.0)%,(73.47±2.0)%,(49.37±2.0)%,(96.45±2.0)%,(71.68±2.0)%,(69.2±2.0)%,respectively.So the loess modified ceramsite can be put into the treatment of initial rainwater runoff in Lanzhou area.