无砾石微孔管地下渗滤系统处理生活污水的中试研究

进行了无砾石微孔管地下渗滤系统处理生活污水的中试研究。基于不同土壤、不同管径、不同植物的协同效应,对比研究了不同系统处理污水中有机物、氮、磷和SS的去除效果及其影响因素。结果表明,不同土壤、不同管径及不同植物组成的系统,对生活污水中有机物、氮、磷和SS的去除效果差别较大。中试系统对COD、总磷、氨氮、总氮和SS的最佳去除率分别达到86.13%、90.20%、61.24%、65.49%和97.43%,对应的出水COD、总磷、氨氮、总氮和SS的平均浓度分别为64.29、0.69、22.13、26.19和5.56 mg/L。分析表明,进水SS浓度过高、外界温度下降等共同作用是导致系统对生活污水中NH4+-N和TN的去除率相对较低的主要原因。

Pilot-scale study on treatment of domestic sewage by gravel-less perforated pipe leach fields system

In this paper,using gravel-less perforated pipe leach fields system(GPPLF) to treat the decentralized domestic sewage was investigated on pilot-scale.Comparative study of methods was used.The removal rates and factors of organic substance,nitrogen,phosphorus and SS of the decentralized domestic sewage were observed.The results indicated that the optimal removal rates of COD,TP,NH+4-N,TN,SS of GPPLF are 86.13%,90.20%,61.24%,65.49% and 97.43%,respectively.The average effluent concentration of COD,TP,NH+4-N,TN,SS are 64.29 mg/L,0.69 mg/L,22.13 mg/L,26.19 mg/L,5.56 mg/L,respectively.This study demonstrates that the main reason of the relatively low removal rates of NH+4-N and TN is the combined action of the high concentrations of SS and falling temperature,ect.