How to solve the problem of increased COD or BOD in wastewater treatment?

　　How to solve the problem of increased COD or BOD in wastewater treatment?

　　If the COD or BOD of the effluent in sewage treatment increases, the following measures can be taken to solve the problem:

　　Inspect and clean sewage treatment equipment: Check for blockages, damage, or malfunctions in the equipment, and perform necessary cleaning and maintenance.

　　Adjusting the sewage treatment process: Depending on the actual situation, adjusting the sewage treatment process may require adding steps such as oxidation, mixing, and sedimentation to improve the removal efficiency of COD or BOD.

　　Increase aeration rate: By increasing aeration rate, the oxygen content in wastewater is increased, promoting the degradation and removal of COD and BOD under aerobic conditions.

　　Increase aeration time: If the degradation rate of COD or BOD is slow, the aeration time can be increased to enhance the degradation effect of COD and BOD in wastewater.

　　Adjusting the dosage of chemical agents: According to the actual situation, adjust the amount of chemical agents added, such as adding coagulants or oxidants to accelerate the removal effect of COD and BOD.

　　Optimize sewage treatment operations: Strengthen monitoring and operation management of sewage treatment equipment, ensure that the equipment operates according to design standards, and avoid improper operation leading to an increase in COD or BOD.

　　Strengthen source control: Strengthen the management and control of sewage sources, reduce the content of COD and BOD entering the treatment system.

　　Add subsequent processing steps: If it is necessary to further reduce the content of COD or BOD, further processing steps can be added, such as activated carbon adsorption, biofilm reactor, etc.

　　The above measures need to be selected and adjusted according to specific circumstances, and can be comprehensively applied in combination with actual situations.