Oxidation wastewater treatment processThe full process guide mainly covers wastewater pretreatment, main treatment processes, and subsequent treatment. The following are specific steps and instructions:

1、 Wastewater pretreatment

1. Water quality and quantity regulation: Adjust the water quality and quantity of wastewater through regulating tanks to ensure the stable operation of subsequent treatment processes.

2. Remove oil and grease: Use an oil separation tank or air flotation device to remove most of the oil and grease in the wastewater, to prevent interference with the subsequent treatment process.

3. Preliminary sedimentation: suspended solids and some heavy metal ions in wastewater are removed through primary sedimentation tanks or coagulation sedimentation, which reduces the burden on subsequent treatment.

2、 Main processing techniques

1. Neutralization regulation: According to the acidity or alkalinity of the wastewater, add the corresponding acid or alkali for neutralization, so that the pH value reaches a suitable range for subsequent treatment. This step is particularly important for aluminum oxidation wastewater, as it often contains acidic substances such as sulfuric acid.

2. Coagulation precipitation: Adding coagulants (such as polyaluminum chloride PAC, polyacrylamide PAM, etc.) to wastewater to form flocs through coagulation, and then using a sedimentation tank to precipitate the flocs, removing suspended solids and some soluble pollutants from the water.

3. Deep treatment: For wastewater containing specific pollutants, deep treatment may be necessary. For example, aluminum oxidation wastewater often contains aluminum ions, which can be removed by adding adsorbents such as aluminum removal resins. In addition, chemical precipitation, filtration, adsorption and other methods can be used to further remove pollutants from wastewater.

3、 Subsequent processing and emissions

1. Treatment of supernatant: After coagulation and sedimentation, the supernatant may still contain a certain amount of pollutants and require further treatment. Membrane treatment technologies such as sand filtration, carbon filtration, ultrafiltration, reverse osmosis, or biological treatment technologies (such as A/O biochemical systems) can be used for further purification.

2. Sludge treatment: The sludge generated by the sedimentation tank needs to be properly treated. Chemical conditioning and mechanical pressure filtration, resource utilization (such as conversion into refractory binder), co disposal with red mud, or harmless landfill can be used for treatment. During the processing, it is necessary to strictly comply with environmental policies and standards to ensure that sludge does not pose a threat to the environment and human health.

3. Standard discharge: Wastewater treated as described above can only be discharged after meeting national or local environmental standards. Before discharge, it is recommended to conduct water quality testing to ensure that the wastewater treatment effect meets relevant requirements.

4、 Precautions

1. Process selection: When choosingOxidation wastewater treatment processWhen dealing with wastewater, it is necessary to comprehensively consider the characteristics of the wastewater (such as pH value, types and concentrations of pollutants, etc.) and treatment requirements (such as effluent quality standards, treatment costs, etc.).

2. Equipment selection: When selecting processing equipment, factors such as processing capacity, operational stability, and maintenance costs need to be considered. At the same time, it is necessary to ensure that the equipment complies with relevant environmental standards and regulations.

3. Operation management: In the process of wastewater treatment, it is necessary to strengthen operation management, regularly inspect and maintain equipment, and ensure the normal operation of equipment and the effectiveness of wastewater treatment. In addition, it is necessary to establish comprehensive wastewater treatment records and archives for subsequent management and auditing.

The entire process of oxidation wastewater treatment includes wastewater pretreatment, main treatment processes, and subsequent treatment. In practical applications, it is necessary to select appropriate processes and equipment based on the characteristics and treatment requirements of wastewater, and strengthen operational management to ensure that the wastewater treatment effect meets relevant requirements.