The sewage treatment system software of the vast majority of electroplating process companies in our country is selected for the representative pollutants in the electroplating process field - hydrogen cyanide and heavy metals exceeding the standard. Among them, the most successful and widely used method is the organic chemical air oxidation restoration coagulation deposition method.

Methods for removing COD from electroplating wastewater:

(1) Activated carbon method: Although COD is reasonable, activated carbon quickly saturates and becomes ineffective, and there is currently no perfect method for its reconstruction;

(2) Membrane method: It can intercept biological macromolecules of organic compounds, but the COD will be higher when discharging concentrated solutions;

(3) UV method: Some companies believe that the use of activated oxygen, UV, and activated carbon methods to solve electroplating wastewater has significant practical effects based on scientific research. Under the premise of entering 10mg/L of activated oxygen and 3W/L of UV, the COD removal rate exceeds 72% after 30 minutes of reaction. Analyzing the above results, it can be seen that the actual effect is not very ideal.

(4) Biochemical method: In order to better reduce the COD index value, generally all electroplating wastewater is first treated through chemical treatment before undergoing biochemical treatment.

COD dissolution and removal agent is a high-efficiency new type of water purification agent developed by our company. This product can efficiently dissolve organic compounds in water, achieve the goal of quickly dissolving COD, and have a high removal rate of COD. At the same time, it can remove ammonia nitrogen and flocculation foundation settlement, and can handle problems that are difficult to solve by general organic chemical drugs.

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