作　　者： ; ; ; ; ; ;

机构地区： 重庆大学城市建设与环境工程学院三峡库区生态环境教育部重点实验室

出　　处： 《农业环境科学学报》 2010年第4期758-763,共6页

摘　　要： 为了解重庆三峡库区农村生活污水排放特征,正确评价农村生活污染状况,选取重庆三峡库区3个行政区中不同经济收入水平、有无下水设施的18户典型农户为监测对象,对其生活污水日产生量、pH、COD、TP、TN、TAN等6项指标进行了连续12月的跟踪监测。结果表明,18户对象农户生活污水人均日产生量、pH、COD、TP、TN、TAN等指标的平均水平分别为:15.22L·cap-·1d-1、6.67、838.93mg·L-1、4.19mg·L-1、53.60mg·L-1、13.39mg·L-1,具有人均污水日产生量明显低于而各特征指标的浓度明显高于城镇生活污水的特点;COD、TP、TN、TAN浓度随季节的变化表现出夏季浓度较低,冬季浓度较高的规律,且COD、TP、TN、TAN浓度之间具有显著的正相关性。此外,利用SPSS软件对影响农村生活污水排放特性的地域、季节、农户收入水平和有无下水设施等因素进行了分析,其结果显示:农村生活污水人均日产生量的主要影响因素为地域,COD的主要影响因素为地域、收入水平和季节,TP的主要影响因素为地域、有无下水,TN和TAN的主要影响因素为季节。 Domestic wastewater is an important source of rural environmental pollution while less study is reported on it. In order to evaluate the status of rural domestic wastewater pollution in the Three Gorges Reservoir Region, 18 typical peasant households with different income levels and life styles in three administrative districts were investigated and characteristic indices of rural domestic wastewater, including the daily discharge per capita, pH, chemical oxygen demand （ COD ）, total phosphorus （ TP ）, total nitrogen （TN） and total ammonia nitrogen （TAN） of rural domestic wastewater, were made a continuous monitoring for 12 months for them. The results showed that the average values of the daily discharge per capita, pH, COD, TP, TN, TAN were 15.22 L·cap-1·d-1, 6.67, 838.93 mg·L^-1, 4.19 mg·L^-1, 53.60 mg·L^-1 and 13.39 mg·L^-1 respectively. The daily discharge per capita of rural domestic wastewater was much lower than that of municipal domestic sewage, but the concentrations of other indices were much higher. The concentrations of the indices, including COD, TP, TN and TAN among which there were significant positive correlations, had an obvious change with season, namely lower in the summer and higher in the winter. Furthermore, factors of influencing rural domestic wastewater discharge characteristic, including region, season, income level and sewer facility, were analyzed by the software SPSS. The results indicated that region played a dominant role in the daily discharge per capita of rural domestic wastewater, that the concentration of COD was influenced by region, income levels and season, and that region and sewer facility had a deep effect on the concentration of TP, while the main influencing factor for the concentration of TN and TAN was the season.

关 键 词： 三峡库区 农村生活污水 排放特征 影响因素 相关性

领　　域： [环境科学与工程]