摘要
采用一种土壤过滤系统处理农村生活污水,考察了该工艺对CODCr、BOD5、NH3-N、全氮(TN)和全磷(TP)的去除效果。实验结果表明,当水力负荷约为0.05 m3/(m2.d),水力停留时间为3 d时。该土壤过滤系统对CODCr、BOD5、NH3-N、全氮(TN)和全磷(TP)的去除效果较好,平均去除率分别达到84.6%、83.3%、64.3%、59.8%和70%。出水CODCr约为18.3～42.1 mg/L,BOD5约为8.9～17.3 mg/L,NH3-N约为11.2～17.7 mg/L,TN约为21.2～31.3 mg/L,TP小于2.0 mg/L,出水水质优于农田灌溉水质标准(GB 5084—2005)。气温变化和进水污染物浓度对处理效果影响明显。总体上来讲,温度大于22℃时,进水污染物浓度越低处理效果越好。
A soil infiltration system is applied for treatment of rural domestic sewage. The removal efficieneies of CODer, BODs, NH3 - N, TN and TP in the process are investigated. The result shows that when the influent load is 0. 05 m3/（ ms ~ d） and hydrau- lic retention time is 3-day, the removal process may achieve better removal efficiencies of CODcr, BODs, NH3 - N, TN and TP. The average removal efficiencies of CODcr, BODs, NH3 - N, TN and TP in the process are 84. 6%, 83. 3%, 64. 3%, 59. 8% and 70% respectively. In the effluent, CODcr is about 18.3 -42. 1 mg/L, BOD5 is about 8.9 - 17.3 mg/L, NH3 -N is about 11.2 17. 7 mg/L, TN is about 21. 2 -31.3 mg/L and TP is less than 2. 0 mg/L It is better than that of standards for irrigation water quality （GB 5084-2005）. Temperature variation and pollutant content in influent have obvious effects on treatment efficiency. In general, when the temperature is higher than 22℃, the lower the pollutant content in influent, the better the treatment efficiency is.
出处
《水利水电技术》
CSCD
北大核心
2012年第12期15-18,共4页
Water Resources and Hydropower Engineering
关键词
污水处理
土壤过滤系统
农村生活污水
农田灌溉水质标准
sewage treatment
soil infiltration system
rural domestic sewage
standards for irrigation water quality
