巢湖流域典型村庄生活污水水质年变化特征

Temporal change of water quality of the typical rural domestic sewage in Chaohu Lake basin

为揭示巢湖流域典型村庄生活污水水质特征,本文采用定点定期采样法,对巢湖流域两类典型村庄生活污水水质进行了2年测定研究.结果显示,不同月份两村生活污水的COD、NH4+-N、TN、TP等指标呈现出相同的变化趋势,各指标浓度在6—8月较低,而COD和TN浓度在12—2月较高;两村的生活污水COD、NH4+-N、TN、TP全年变化范围为46.77—424.80 mg.L-1、4.30—17.40 mg.L-1、9.36—34.38 mg.L-1、0.27—3.06 mg.L-1;大汤村和电厂新村两村生活污水全年COD、NH4+-N、TN、TP平均值分别为171.98 mg.L-1和219.60 mg.L-1、8.07 mg.L-1和11.52 mg.L-1、17.80 mg.L-1和21.33 mg.L-1、1.15 mg.L-1和1.53 mg.L-1.

Rural domestic sewage contribution has become a major source of water quality deterioration of Chaohu Lake.To reveal the water quality characteristics of the typical rural domestic sewage in Chaohu Lake basin,samples from two villages named Datangcun and Dianchangxincun were collected for two years and analyzed for drainage amount and pollution characteristics such as COD,NH＋4-N,TN,TP.The results show that the concentrations of COD,NH＋4-N,TN,TP in domestic wastewater were low between June and August,while the concentrations of COD and TN were high between December and February.The results also show that the concentration range of COD,NH＋4-N,TN,TP in domestic wastewater in Datangcun and Dianchangxincun was respectively 46.77—424.80 mg · L-1,4.30—17.40 mg · L-1,9.36—34.38 mg · L-1,0.27—3.06 mg · L-1,and the average concentration of COD,NH＋4-N,TN,TP was respectively 171.98 mg · L-1 and 219.60 mg · L-1,8.07 mg · L-1 and 11.52 mg · L-1,17.80 mg · L-1 and 21.33 mg · L-1,1.15 mg · L-1 and 1.53 mg · L-1.This work has provided the basis for the scientific treatment of rural domestic sewage in Chaohu Lake basin.