What are the treatment methods of industrial wastewater?

Mainly according to the different specific gravity of suspended solids contained in wastewater, physical separation is adopted, such as gravity separation, centrifugal separation, filtration, evaporative crystallization and so on. Its purpose is to remove suspended solids and colloidal substances.

2. Chemical methods

The pollutants in wastewater are mainly transformed, separated and recovered through chemical reactions. This method includes neutralization, coagulation, chemical precipitation and redox treatment. Its purpose is to adjust PH value and remove suspended solids, colloids and soluble substances.

3. Physical and chemical treatment methods

It mainly includes electrolysis, adsorption, membrane separation and magnetic separation to remove suspended solids, colloids and soluble substances.

4, biological treatment method

Mainly a method for removing organic pollutants from wastewater by microbial metabolism. Commonly used methods include activated sludge method, biofilm method, oxidation pond method and sludge digestion method. , can remove colloid and soluble substances.

Harm of industrial wastewater:

1, industrial wastewater directly flows into channels, rivers, lakes and polluted surface water. If it is more toxic, aquatic animals and plants will die or even disappear;

2. Industrial wastewater may also seep into groundwater and pollute groundwater, thus polluting crops;

3. If the surrounding residents use polluted surface water or groundwater as domestic water, it will be harmful to their health and even death;

4. Industrial wastewater seeps into the soil, causing soil pollution and affecting the growth of microorganisms in plants and soil;

5. Some industrial wastewater still has an unpleasant smell, which pollutes the air;

6. Toxic and harmful substances in industrial wastewater will stay in the body through the intake and absorption of animals and plants, and then reach the human body through the food chain, causing harm to the human body.