According to the inquiry of Changsha Wang Tong High-tech Water Co., Ltd. and China Survey and Design Association, the water treatment process information of Changsha Wang Tong High-tech Water Co., Ltd. is as follows:
1. The company is mainly responsible for the design and construction of the second phase expansion of the sewage plant in Wangcheng High-tech Industrial Development Zone and its supporting projects.
2. The design scale of the project is 2 1 10,000 cubic meters of sewage/day, and advanced sewage treatment equipment is adopted.
3. Carrousel oxidation ditch treatment process is adopted as the main process in the plant area of this project, and the discharge standard of the treated sewage water quality is Class I B standard of Pollutant Discharge Standard for Urban Sewage Treatment Plants (GB 189 18-2002).
4. Carrousel oxidation ditch treatment process is a biofilm method, which uses microorganisms to attach to the surface of filler to form biofilm, and provides oxygen and nutrients through aeration and mixing to remove organic matter and nitrogen.