不同填料地下渗滤系统处理生活污水研究

比较了以土壤装填的1#地下渗滤装置及以土壤煤渣分层装填的2#地下渗滤装置在不同水力负荷下的生活污水净化效果,并分析了土壤煤渣分层装填对装置性能的改善作用。结果表明,在5、10 cm/d运行时,除总氮外,2#装置对其他指标的去除率均80%,且运行稳定,抗冲击负荷能力强;在20 cm/d运行时,1#装置因堵塞而停止运行,2#装置对COD、总磷、氨氮、总氮的去除率分别为92.2%、84.4%、61.9%、57.8%。进一步说明土壤煤渣分层填料可充分利用填料的水力渗透性,有效提高地下渗滤系统的水力负荷,且保持了其对污染物去除的高效性。

Research on the treatment of domestic sewage by subsurface infiltration systems with different filling materials

The domestic sewage purifying effect o f soil l oaded 1# subsurface infiltration system and the soil-cinder layer loaded 2# subsurface infiltration system have been compared under different hydraulic loads ,and the impro-ving effect of soil-cinder layer loaded on the system capability is analyzed. The results show that when it runs at 5 ,10 cm/d,the removing rates of other indexes by 2# system,except TN,are all higher than 80%. It runs stably and has strong shock resistance loading. When it runs at 20 cm/d,1# system stops running because of blockage. The removing rates of COD,TP,ammonia-nitrogen,and TN are 92.2%,84.4%,61.9%and 57.8%,respectively. The results indi-cate further that soil-cinder layered filling materials can make full use of the hydraulic permeability of the filling ma-terials and effectively improve the hydraulic load of subsurface infiltration system and keep its highly efficient capac-ity for the removal of pollutants.