The device is characterized by the stable performance, effective treatment, economical investment, automatic operation, convenience of maintenance and small occupying space. There is no need for construction, neither heating and heat preservation.The surface can be used as green land or square land.It also can be placed on ground based on client’s requirement. As the most efficient sewage treatment device, it is widely used in treating the sewage in the area of senior hotels, village districts and residential districts, industrials, resorts etc. The sewage water after treatment would meet the national emission standards or can be used to irrigation based on clients’ requirement of water standards.