Chemical treatment of industrial wastewater

Chemical industrial wastewater mainly from the petrochemical industry, coal chemical industry, acid and alkali industry, fertilizer industry, plastics industry, pharmaceutical industry, dyestuff industry, rubber industry and other production wastewater discharged. Chemical wastewater pollution prevention and control measures are: first of all, we should reform the production process and equipment, reduce pollutants, prevent wastewater discharge, comprehensive utilization and recycling; must be discharged wastewater, the degree of treatment should be based on the quality of water and the requirements of the choice. The primary treatment mainly separates the suspended solids, colloidal matter, floating oil or heavy oil in the water. Water quality and quantity adjustment, natural sedimentation, floating and oil separation methods can be used.

Waste water treatment in the chemical industry

Secondary treatment is mainly to remove biodegradable organic solutes and some colloidal substances, reduce the biochemical oxygen demand and part of the COD in the wastewater, usually using biological treatment. After biological treatment of wastewater, but also a considerable amount of residual COD, sometimes with high color, smell, taste, or because of high environmental health standards, it is necessary to use tertiary treatment methods for further purification. Tertiary treatment is mainly to remove organic pollutants and dissolved inorganic pollutants in wastewater that are difficult to biodegrade. Commonly used methods include activated carbon adsorption and ozone oxidation, and ion exchange and membrane separation technology can also be used. Various chemical industrial wastewater can be based on different water quality, water quality and discharge water quality requirements after treatment, the choice of different treatment methods.