1. Choose different treatment schemes according to different water quality: different types of mine wastewater have different water quality.

a) Some mine wastewater is of good quality and contains no or few harmful substances. After simple treatment, it can be directly used in daily life and production;

b) Weak acid mine wastewater can be desulfurized by REDOX reaction;

c) The suspended solids in waste water are mainly coal and stone powder from coal mining, and such waste water should be filtered and treated.

d)For some high salinity wastewater and mine wastewater containing special pollutants, this wastewater is usually harmful to living organisms, so it must be recycled and treated.

2. Rigorous analysis of water quality: Water quality has changed as mining operations have progressed.Surface and rock water mainly contain suspended solids and general water impurities, and the quality of groundwater becomes unstable due to continuous excavation.Therefore, it is necessary to make a comprehensive analysis in the process of mine wastewater utilization in order to work out a set of comprehensive and scientific wastewater treatment plan.

3. Eliminate secondary pollution of water quality: the purification and transfer of mine wastewater must be carried out in strict accordance with the process and technology.Avoid secondary pollution of water quality caused by improper operation, which will affect water quality and cause major safety risks.

4. Principles for dealing with the relationship between long-term interests and short-term interests: for the treatment of mine wastewater, we should not only look at the immediate investment, but also look at the problem from a long-term and overall perspective.Sewage treatment equipment investment is the basis of long-term benefits, must establish environmental awareness and scientific management consciousness, is conducive to the long-term development of enterprises.

5. Determine the treatment process according to the mining process

a)Clean mine waste water: Clean mine waste water is of better quality and can usually be drained by diversion.For this water, a special drainage system has been established in the mine, and after simple treatment and disinfection, it can be used as industrial and domestic drinking water

b)Mine wastewater treatment processes containing suspended solids: Since pollutants come from coal mining, coal seams and rock layers collide with machinery and produce large amounts of dust, these fine particles are also used as domestic water.The main treatment methods of suspended matter in water are coagulation, precipitation, filtration and sterilization.Aluminium or ferric salts are first proportioning and then thoroughly mixed in a pump or pipe mixer. The coagulation reaction is completed and the precipitate is produced.Used to filter particulate matter.NACIO, CIO: and liquid chlorine were added successively for disinfection.

c)High salinity water treatment process: Membrane separation is a common method of high salinity water purification, mainly through the pressure difference, concentration difference and potential difference to purify wastewater.

d)Wastewater treatment process containing special contaminant elements: in order to deal with the special contaminants containing Fe and Mn heavy metals, the suspended solids must be removed first, and then the oxidation oxidation process is used to remove iron.For the special pollutants containing chlorine, the main method is activated alumina.In the process of defluorination and regeneration, aluminum and fluorine are separated from impurities together.In addition, in recent years, water purification and purification technology has been constantly developed.There are also biochemical and wetland ecological processes.These two processes have the characteristics of low operating cost and convenient technical management, and have been widely used.