摘要
针对传统无砾石管式地下渗滤系统存在的处理性能差,渗滤通量低两个问题,通过去掉包裹织物,提高渗滤管开孔率、改变开孔方式,设计了无砾石微孔管地下渗滤系统。通过实验研究表明,无砾石微孔管地下渗滤系统对COD、氨氮的去除率比传统管式系统分别提高了10.8%、12.7%,总磷去除率并无显著差异,ORP值提高约85 mV,渗滤通量提高26.8%。在3.3 cm/d的水力负荷下,无砾石微孔管地下渗滤系统出水COD、氨氮、总磷平均浓度分别为19 mg/L,0.62 mg/L,0.048 mg/L。渗滤管下10 cm的土壤层去除了约70%的COD,80%的氨氮和91%的总磷,向下随着土壤深度的增加,单位厚度的土壤层去除的污染物量呈显著下降趋势。
This paper refers to the on-site wastewater treatment based on soil absorption fields with regard to a new pipeline system-gravel-less perforated pipe leach-fields（GPPLF）-as a substitute for the conventional gravel-less pipe leach-fields（TGPLF）.An experiment was conducted to test the new system＇s performances about upgrading of effluent flux and removal of pollutants,inter alia,COD,ammonia nitrogen and TP.Results indicated that with GPPLF the soil layer of 10 cm thick under the perforated pipes removed about 70% of COD,80% of ammonia nitrogen and 91% of TP in the effluent.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2011年第3期98-101,共4页
Environmental Science & Technology
基金
四川省科技支撑计划(2009SZ0244)
