Feasibility Research Of Sewage Treatment Plant In East Of City

A is a city severely short of water. The development of industry continuously polluting the limited water resources, along with the periodic droughts and uneven distribution of regional water resources, are all contributing to the growing shortage of water resources. With the development of economy and the rapid increase of population, the original Sewage Treatment Plant in the east of the city cannot meet practical needs anymore. Consequently, the direct emission of raw sewage in large scale not only affects the city environment, but also pollutes waters near the Bohai Sea. It can thus be seen that it is urgent to reconstruct The east Sewage Treatment Plant, which has a great influence on economic development and environmental protection of the city.Firstly, this paper put forward the background and significance of this topic, introduced the current research of sewage treatment technologies both at home and abroad, laid emphasis on the advanced technology and projects. Secondly, according to the real situation in the east of the city and the prediction of water consumption in long term and short term, the article determined the suitable processing scale of the sewage treatment plant; through investigating the comprehensive quality of sewage in this area, the article determined the quality of influent water in the plant; in accordance with the State Environmental Protection Administration and local standards, it determined that the water quality of effluent should meet GB18918-2002, the first level of emissions standards. Thirdly, this paper precisely analyzed the composition of sewage and various pollutants removal processes, and then, it made a comparison between several advanced treatments and the combination techniques. Taking all these factors into account, such as the investment of the project, the convenience and economy of the operation and management, the reliability of the process, and the covered area, it is decided that the SF-AO technology acted as the biological treatment and the technical route “mixed + flocculation + precipitation + filtration process” served as the advanced treatment. Meanwhile, this paper also completed the design of main structures of the plant, which must be suitable for real situation, combined with practical economy and reliable safety, great innovation and advancement as well.Through predicting, analyzing the natural and social environment around the east sewage treatment plant, this article summarized the social benefits, environmental benefits and economic benefits of the construction of this plant, and came up with advices on operation and management in the future.