The sewage treatment worker refers to the engineers who specialize in using various methods to separate the pollutants contained in sewage or convert them into harmless substances, so that the sewage is purified. The main removal of sewage in a suspended state of solid pollutants, most of the physical treatment method can only complete the requirements of primary treatment. After primary treatment of sewage, BOD can generally remove about 30%, not up to the discharge standard. Primary treatment belongs to the secondary treatment of pretreatment.
Anhui Province is an important part of the Yangtze River Delta, in the national economic development of the strategic key and the docking zone of several major domestic economic plate, economic, cultural and other areas of the Yangtze River Delta has a historical and natural links. Anhui has a long history of cultural development, consisting of four cultural circles: Huizhou culture, Huaihe River culture, Anhui River culture and Luzhou culture.