| In order to speed up the construction of small town sewage treatment facilities,prevention and control of water pollution in small towns,and promote the development of small cities and towns sewage treatment and resource utilization,the State Council and the Ministry of Construction have issued relevant policies.The construction of sewage treatment facilities for small towns,Sewage treatment rate made a mandatory requirement.The implementation of sewage treatment and pollution control in the process,the security issues in the first place,taking into account the local government’s economic affordability,thereby reducing COD,NH3-N,TP and other key pollutants on the surrounding emissions of water pollution,protection of human survival Environment,to improve the water environment of small towns played a significant role.This paper summarizes the water pollution and treatment status of small towns,and introduces them from the problems of small town sewage treatment,the characteristics of small town sewage and the small town sewage treatment technology.This paper takes the Xinghe Town of Zhidan County as an example to study the sewage treatment technology and resource utilization of small towns in northern Shaanxi.With the rapid development of social economy and urbanization in Xinghe Town,the discharge of sewage is increasing day by day,and the pressure to solve the problem of water pollution is getting bigger and bigger.According to the requirements of the National Water Environmental Protection Law,it is necessary to improve the sewage treatment capacity and discharge standards of Xinghe Town,to separate the sewage and rainwater in small towns and improve the effect of sewage treatment in small towns,so as to further improve the water environment.The main work of this paper and some of the conclusions are as follows:1,the water was predicted to discuss and select the sewage treatment plant process program,to improve the local ecological environment,improve the well-being of local residents and promote local economic stability and rapid development of great significance.2,the project to improve the river water quality and Zhidan County ecological environment,to ensure that the water source in Yan’an City-Wang Yao reservoir water quality has a very important social significance,is also very urgent.3,the project sewage treatment capacity of 500m~3 / d,long doubled,sewage plant covers an area of 2.7 acres,a total investment of 8.1181 million yuan.Sewage trunk pipe length 3.6km,the total investment of 768.05 million yuan... |
