The Feasibility Study Of Applying Diatom Fine Soil Physicochemical Technology In Town Sewage Treatment Plant

With the population growth and the rapid development of townships and villages, industrial pollution problems of the rural ecological environment have become increasingly serious. As one of the most important environmental problems in the cities and towns of China, water pollution is not only harmful to people’s health, but also inhibits the development of economy and destroys the ecological balance. For constructing ecological civilization of villages and towns, the first priority is to ensure sustainable usage of water resource and to reduce the point source of pollution. However, limited by the layout construction plan and finances, the urban sewage pipe network is not sound, thus bring serious difficulty for the collection and treatment of waste water from the distributed residents and industrial enterprises.In this work, we studied the feasibility of designing a sewage treatment plant for a small town of A, which is located in the reservoir area of Three Gorges, with a daily processing capacity of 4000 m3 wastewater. By carefully investigating the related information(e.g., water quantity and quality), and comprehensively comparing the related processing technologies for wastewater treatment, we proposed a project for building a town sewage treatment plant on the basis of a diatom fine soil physicochemical technology.Diatom fine soil physicochemical technology is a relatively new sewage treatment technology. It provides a good platform for solving the wastewater problem of our country. Compared with the widely application of biochemical technology, this technology has numerous advantages, such as high treatment efficient, strong adaptability, low investment, low processing cost, small cover area, easy to operate, reliable running and so on. Moreover, this technology is an integration of flocculation, adsorption and filtration, which can efficiently remove COD, SS, BOD from the water, and can also work in coordination with microbes for the removal of organic compounds in the wastewater. By using this technology, the treated sewage will reach the national standard of GB8978-1996 for discharging. We believed that this technology will bring significant economic benefits and environmental benefits when it is successfully applied in engineering practice.