WSZ type sewage treatment integrated treatment equipment, removing BCOD, NH3 small -N treatment equipment, is the most effective sewage treatment equipment at present. WSZ series sewage treatment equipment can be buried below the surface, and the surface can be used as a green square, so the equipment does not occupy the surface area, does not need heating, and does not need to build a house. WSZ-type domestic sewage treatment equipment has good reliability, usually does not require special personnel to manage, only needs monthly maintenance. It is widely used in domestic sewage treatment in hotels, sanatoriums, schools, residential areas and villas.