Chemical Industry Wastewater
Chemical industry wastewater mainly comes from the production wastewater discharged from petrochemical industry, coal chemical industry, acid and alkali industry, fertilizer industry, plastics industry, pharmaceutical industry, dye industry, rubber industry, etc. Chemical industry wastewater is generally divided into three levels. The primary treatment mainly separates suspended solids, colloids, oil slicks or heavy oils in water, and can be naturally precipitated, floated, etc.; secondary treatment mainly removes biodegradable organic solute and some colloids, usually by biological method. Treatment; tertiary treatment is mainly to remove organic pollutants and dissolved inorganic pollutants that are difficult to biodegrade in wastewater. Common methods include activated carbon adsorption and ozone oxidation.