成都市新都区农村生活污水排放特征及影响因素分析

Research on the Emission Characteristics and Factors of Rural Domestic Sewage in Xindu District of Chengdu

新都区位于中国四川成都市中心区北部,是成都重要的商贸基地和高端装备制造基地。由于乡村振兴政策的不断推行,农村经济快速发展,农村居民生活水平的提高,农村生活污水的排放总量也随之增加,但部分地区污水收集设施不够完善,生活污水排放依然存在直接排放等问题。本文通过对新都区农村生活污水排放特征分析,发现2020年,清流镇、军屯镇两地区直排废水中COD排放量为217.5吨、NH_(3)-N 29.21吨、TN 60.09吨、TP 4.95吨,相比2015年,污染物排放量均有所增加,进一步分析生活污水排放的影响因素,发现生活污水排放量和居民收入水平、季节变化等有关,收入水平越高,生活污水产生量越高,夏季生活污水中污染物排放量偏低,冬季偏高等。

Xindu District is located in the northern part of the central area of Chengdu,Sichuan,China.It is an important business base and high-end equipment manufacturing base in Chengdu.Due to the continuous implementation of rural revitalization policies,the rapid development of rural economy and the improvement of rural residents’living standards,the total amount of rural domestic sewage discharge has also increased.However,sewage collection facilities in some areas are not perfect,and domestic sewage discharge still has problems such as direct discharge.This paper analyzes the characteristics of rural domestic sewage discharge in Xindu District and finds that in 2020,the COD emissions in the direct wastewater from Qingliu town and Juntun town will be 217.5 t,NH_(3)-N 29.21 t,TN 60.09 t,and TP 4.95 t,which are higher than the pollutant discharge in 2015.Further analysis of the influencing factors of domestic sewage discharge,it is found that the discharge of domestic sewage is related to the income level of residents and seasonal changes.The higher the income level,the higher the amount of domestic sewage produced.Pollutant emissions are low and high in winter.