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Zero discharge of wastewater means that no waste liquid is discharged from the factory after wastewater treatment process.the pollutants in the salt containing wastewater will be separated and treated and the effluent will be completely reused.The salt and pollutants in the wastewater will be sent to the waste disposal plant in solid form or taken as useful chemical raw materials after being concentrated and crystallized.
The reverse osmosis process is the reverse process of the infiltration.It use the pressure of semi-permeable membrane to separate.The solvent can pass through the semipermeable membrane but the solute can not.
Mine water refers to the external drainage of the mining process. During the mining process, a series of physical, chemical and biochemical reactions occur between the groundwater and the ore layer and the rock formation. The toxic substances in the ore layer and rock formation enter the mine water. If directly discharged without treatment,the mine water will pollute the water body and destroy the ecological environment.In this case,it is necessary to treat the mine water; Affected by the environment, climate or region, mine waters are various in different mine, and even different areas of one mine.Choosing the mine water treatment method according to local conditions can improve the utilization rate and treatment effect of mine water.
Reclaimed water means that the industrial wastewater is treated by high technology to remove various impurities, toxic and harmful substances and some heavy metal ions from polluted water bodies, then the water will be disinfected and sterilized. The water body will be colorless, odorless and clear and transparent. The water will meet or is better than the national standards for miscellaneous water (or related regulations) .This method is widely used in enterprise production.
Electrodialysis is to use selective permeability of the ion exchange membrane to separate the electrolyte from the solution driven by the potential difference under the action of DC electric field, thereby achieving the purpose of desalination, concentration, purification of the solution. The core component of electrodialysis is the membrane stack. The membrane stack is mainly composed of electrodes and ion exchange membranes. The adjacent ion exchange membranes are separated by partitions.