1. Biological treatment
The wastewater is treated by a series of microorganisms, using the metabolic capacity of microorganisms to decompose organic matter into harmless substances.
This method is very good for organic wastewater treatment, safe and environmentally friendly, low cost, and is one of the commonly used wastewater treatment methods.
2. Chemical treatment
The chemical treatment method is to add chemical reagents to treat harmful substances in wastewater and convert them into harmless substances or precipitated substances.
This method has a good effect on the treatment of pollutants containing heavy metals, organic substances and sulfates in wastewater, but it consumes a lot of chemical reagents and has the risk of secondary pollution.
3. Physical treatment
The physical treatment method is a method to separate polluting substances from wastewater by physical methods, which mainly includes filtration, membrane separation, adsorption and other treatment methods.
Physical treatment method is mainly suitable for wastewater containing suspended substances, pigments and other debris, the treatment effect is better.