Shanghai Songjiang Sewage Treatment Plant is located in the beautiful and rich Songjiang District of Shanghai, serving a population of 654.38+0.5 million. The service area is mainly domestic sewage and industrial wastewater discharged by residents in Songjiang District, Shanghai, with a service area of 300,000 square kilometers. According to the person in charge of the factory, 80% of the tap water in Shanghai comes from Huangpu River, and the water intake is located at Songpu Bridge, 9.3 kilometers downstream of Songjiang City. Therefore, whether the sewage treatment work in Songjiang District of Shanghai is done well will be of great significance to protect the water quality of Huangpu River and the drinking water source in Shanghai, and Shanghai Songjiang Sewage Treatment Plant plays a vital role in protecting the drinking water source quality in Songjiang District and even in Shanghai. Therefore, the operation quality and effluent quality of Shanghai Songjiang Sewage Treatment Plant are very important.

Shanghai Songjiang Sewage Treatment Plant mainly includes the first and second phases, of which the first phase was put into operation on 1985, with a daily treatment capacity of 27,000 tons, and the treatment process was conventional activated sludge process; The second phase is a sub-project of the Shanghai Environment Project of the World Bank, with a total investment of 265 million yuan, of which the World Bank loan is 10 million yuan. The project includes the expansion of 50,000 tons/day sewage treatment equipment, the transformation of the first phase project and the construction of additional pipe networks and pumping stations in urban areas. After the transformation, the first and second treatment processes are all A/O denitrification processes, and the daily treatment capacity of Songjiang Sewage Treatment Plant after the transformation and expansion is 68,000 tons.

The A/O sewage treatment process adopted by Songjiang Sewage Treatment Plant is an advanced and effective sewage treatment process for nitrogen removal at present. The influent quality of COD in this plant is close to 1 1,000 mg/L, but the effluent quality of COD is 60mg/L, which fully meets the national effluent quality standard and has good denitrification effect. Because of its advanced sewage treatment technology and technology, this is to improve the local environmental conditions and prevent.