The sewage treatment of the domestic water treatment station of Nan'aosi Coal Mine has reached the efflux standard. The previous efflux treatment method wastes water resources and also increases the electricity cost of the pumping pump of the motorized well. In order to improve the utilization rate of domestic sewage and reduce the cost of electricity bills, the mine's electromechanical science and technology team brainstormed to reuse domestic sewage.

　　By adding a sewage water tank in the living area, the water treated by the domestic water treatment station is connected to the sewage water tank and connected to the dustproof pipeline for daily dust control in the living area of ​​the mine, which solves the problem of dust prevention in the living area of ​​the mine. It has also reduced the pumping water and electricity costs of motorized wells. It is estimated that the cost of pumping water and electricity of motorized wells can be saved by 18,000 yuan each year, and water costs by 60,000 yuan, totaling 78,000 yuan.