不同填料地下渗滤系统处理生活污水研究

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

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。

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 improving effect of soil-cinder layer loaded on the system capability is analyzed. The results show that when it runs at 5,10cm/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 indicate further that soil-cinder layered filling materials can make full use of the hydraulic permeability of the filling materials and effectively improve the hydraulic load of subsurface infiltration system and keep its highly efficient capacity for the removal of pollutants.