The waste liquid after cleaning the metal parts contains metal ions, oil stains and some precipitated dirt. The waste liquid must be treated to meet environmental protection requirements before the waste liquid is discharged. Our company adopts on-site treatment methods of adsorption, filtration, flocculation sedimentation, oxidation and PH value system to remove oily dirt, heavier suspended solids (SS), heavy metal ions, and reduce organic matter (COD) in waste liquid to achieve national environmental protection. Emission requirements.

1. Adsorption treatment (oil-water separation): Use activated carbon or absorbent cotton to adsorb the oil suspended on the surface of the waste liquid to be treated to remove the oil on the surface of the waste liquid

2. Treatment of suspended solids: add a layer of filter to the waste discharge outlet to remove heavy suspended solids (SS)

3. Flocculation sedimentation treatment: There are fine particles and colloids in the filtered waste liquid. The non-toxic and environmentally friendly organic polymer flocculant-polyacrylamide is used to make the fine particles larger and settle while adsorbing the waste liquid. Organic molecules in waste liquid, organic matter (COD) in waste liquid,

4. Oxidation treatment: Sodium hypochlorite is used to decolorize the flocculation and sedimentation treatment of the waste liquid, and at the same time reduce the organic matter (COD) in the waste liquid again

5. PH value adjustment: After the above-mentioned treatment of waste liquid, SS, COD and metal ions are greatly reduced. Use hydrochloric acid waste acid to neutralize the pH value of the waste liquid to a pH value between 6-9 (using high-precision PH Value test paper or pH meter with accuracy of 0.1), meeting the national environmental protection second-level emission requirements