What are the treatment methods for industrial wastewater?

Industry is an important part of economic development, it is to promote economic development at the same time also affected the environment. Industrial waste water, waste gas and other serious pollution of the environment, then how to deal with industrial waste it?
1 physical processing
Through the physical role of the separation, recovery of waste water is not dissolved in the suspension of pollutants (including oil film and oil beads), commonly used gravity separation method, centrifugal separation, filtration and so on.
Chemical treatment
To add a chemical substance to the sewage, the use of chemical reactions to separate and recover the pollutants in the sewage, commonly used chemical precipitation method, coagulation method, neutralization method, redox (including electrolysis) method.
3 physical chemistry method
The use of physical and chemical effects of waste water in the removal of pollutants, mainly adsorption, ion exchange, membrane separation, extraction and so on.
Biological treatment
Through the metabolism of microorganisms, so that the solution of wastewater, colloid and micro-suspended organic pollutants into stable and harmless substances can be divided into aerobic biological treatment and anaerobic biological treatment.
Plant spray liquid deodorization method is to produce a malodorous gas by spraying the plant extract will be stench gas to neutralize and absorb, to achieve the purpose of deodorization, deodorant effect of low concentration can reach 50%, different odor selection of different spray Liquid, often need to add plant spraying liquid, and the need to maintain equipment, operation and maintenance costs are high, easy to cause secondary pollution.
5 UV photolysis purification method
UV photolysis purification method using high-energy UV ultraviolet light, in the photolysis purification equipment, the decomposition of oxidative odor material molecular chain, change the material structure, the polymer pollutants cracking, oxidation of low molecular weight-free substances, the deodorization efficiency of 99% (GB14554-93), can deal with ammonia, hydrogen sulfide, methyl mercaptan, methyl sulfide, benzene, styrene, carbon disulfide, trimethylamine, dimethyl disulfide High concentration of mixed gas, the internal light source can be used for three years, the equipment life of more than 10 years, the purification technology is reliable and very stable, clean equipment without routine maintenance, just turn on the power can be used normally, and low operating costs, Secondary pollution.
Scope: food processing plants, meat processing plants, slaughterhouses, poultry feed yards, paper mills, sewage treatment plants, garbage transfer stations, manure and other organic and inorganic odor of deodorant gas purification treatment. Refinery, rubber plant, tanneries, printing plants, chemical plants, Chinese and Western pharmaceutical companies, metal foundry, plastic recycling plant, spraying solvents and other organic and inorganic odor of gas purification treatment.