Aluminum profile spraying is an important part of the manufacturing industry, however, the wastewater generated during the spraying process contains a large number of harmful substances such as organic solvents, pigments and additives. If not properly treated, this wastewater will cause serious pollution to the environment. Therefore, the treatment of aluminum spraying wastewater has become an important task.
Treatment method of aluminum profile spraying wastewater.
Physical method: separation of suspended solids, oils and other substances in wastewater through physical action. Commonly used physical methods include precipitation, filtration, adsorption, etc. The physical method has the advantages of simple operation and low cost, but the treatment effect is limited, and it is difficult to remove dissolved substances. In practical application, the appropriate physical method can be selected for pretreatment according to the nature of the wastewater to improve the subsequent treatment effect.
Chemical method: Removal of dissolved substances and harmful ions in wastewater through chemical reactions. Commonly used chemical methods include neutralization, precipitation, redox, etc. The chemical treatment effect is good, but it may produce secondary pollution, and the treatment cost is high. In the treatment of aluminum spraying wastewater, heavy metal ions and some dissolved organic compounds can be removed by chemical methods. For example, heavy metal ions are converted into precipitates by adding precipitants such as hydroxides or sulfides, which are then removed by precipitation and filtration.
Biochemical method: use the metabolic action of microorganisms to decompose organic matter in wastewater. Commonly used biochemical methods include activated sludge method, biofilm method, etc. The biochemical treatment effect is good and the cost is low, but the water quality requirements are high and the treatment time is long. In the treatment of aluminum profile spraying wastewater, the appropriate biochemical method can be selected for advanced treatment according to the nature of the organic matter in the wastewater. For example, the anaerobic-aerobic combined process is used to decompose macromolecular organic matter into small organic matter through anaerobic microorganisms, which are further degraded into carbon dioxide and water by aerobic microorganisms.
Combined process: In order to improve the effect of wastewater treatment, a combination of multiple methods is often used. For example, physical or chemical pretreatment is carried out to reduce the concentration and salinity of pollutants in the wastewater, and then advanced treatment is carried out using biological methods. The combined process can give full play to the advantages of various methods, improve the efficiency of wastewater treatment, and reduce treatment costs. In practical applications, the appropriate combination process should be selected according to the nature of the wastewater and the treatment requirements.