How does skid-mounted painting wastewater treatment equipment achieve efficient wastewater purification?
Publish Time: 2025-06-17
In metal surface treatment and spraying processes, painting wastewater is an inevitable by-product. This type of wastewater has complex components and usually contains pollutants such as surfactants, emulsified oils, heavy metal ions and suspended impurities, which are toxic and difficult to biodegrade. In order to meet environmental emission standards and reduce the impact on the environment, it is essential to adopt an efficient, stable and flexible wastewater treatment system. Skid-mounted painting wastewater treatment equipment is a modular and integrated treatment system designed to solve this problem, which can achieve efficient purification and standard discharge of wastewater.System customized design: meet the needs of different working conditionsOne of the biggest advantages of skid-mounted painting wastewater treatment equipment is its high degree of customizability. The system will be personalized according to the owner's actual production drainage, on-site space conditions and emission standards to ensure that each device can accurately match the use scenario. For example, when treating metal surface treatment wastewater, the system will focus on the removal efficiency of pollutants such as degreasers, phosphates, heavy metals, etc. contained in the wastewater, so as to select the most suitable treatment process combination.Analysis of wastewater sources and water quality characteristicsThis type of wastewater mainly comes from pre-degreasing, degreasing, surface conditioning and pre-treatment processes, and is a typical metal surface treatment wastewater. It is characterized by large pH fluctuations, high organic matter content, high oil and suspended solids concentrations, and contains a certain amount of organic components that are easily degraded by biological bacteria. If it is discharged directly without effective treatment, it will not only cause blockage to the municipal pipe network, but also may affect the normal operation of subsequent sewage treatment plants.Treatment process: neutralization + flotation + filtration triple guaranteeIn view of the above water quality characteristics, this scheme adopts "neutralization + high-efficiency dissolved air flotation + filtration" as the core treatment process:Neutralization reaction section: By adding an appropriate amount of acid-base regulator, the pH value of the wastewater is adjusted to an appropriate range, and at the same time, some metal ions are promoted to precipitate, creating favorable conditions for subsequent treatment.High-efficiency dissolved air flotation section: Use a dissolved air releaser to generate tiny bubbles to bring oil, fine suspended particles and light pollutants in the wastewater out of the water surface, and the scum layer is automatically removed by the scraper after forming a scum layer. This step can effectively remove grease and colloidal substances in wastewater, significantly reducing COD and turbidity.Filtration section: The wastewater after flotation treatment enters the quartz sand or multi-media filter to further remove the residual fine suspended matter and improve the transparency and stability of the effluent.The entire treatment process has a high degree of automation and is easy to operate. It is suitable for on-site installation and use of small and medium-sized coating companies and production lines.System advantages: compact integration, stable operation, and convenient maintenanceThe skid-mounted painting wastewater treatment equipment adopts an integrated skid-mounted structure. All treatment units are integrated in one or more standardized boxes, which occupies a small area and is easy to transport and install on site. In addition, the system is equipped with a PLC control system with functions such as automatic operation, fault alarm, and remote monitoring, which greatly improves the intelligent level of operation. The daily maintenance of the equipment is simple, and it only needs to clean the scum regularly and replace the filter material to maintain a good operating state.With its modular design, high treatment efficiency, stable operation, and convenient management, skid-mounted painting wastewater treatment equipment has become an indispensable environmental protection supporting facility in the modern coating industry. Through scientific process design and strict water quality control measures, it can effectively remove harmful substances in wastewater, achieve standard emissions, and help companies move forward steadily on the path of green manufacturing.
