How does skid-mounted painting wastewater treatment equipment deal with high concentrations of organic matter in painting wastewater?
Publish Time: 2025-04-21
In the painting industry, wastewater treatment is a crucial link. In particular, the treatment of high concentrations of organic matter is the key to testing equipment performance and technical level. Skid-mounted painting wastewater treatment equipment, with its integrated and modular design, as well as efficient and flexible processing capabilities, has become a powerful tool to meet this challenge.1. Challenges of high concentrations of organic matterThe presence of high concentrations of organic matter in painting wastewater brings many challenges to wastewater treatment. These organic matter often have complex chemical structures and are difficult to effectively remove by traditional physical or chemical methods. At the same time, high concentrations of organic matter may also cause the biological treatment unit in the wastewater treatment process to be inhibited, affecting the treatment effect. In addition, these organic matter may also cause long-term pollution to the environment, endangering ecological balance and human health.2. Response strategies of skid-mounted painting wastewater treatment equipmentEffective removal in the pretreatment stage: In the pretreatment stage, skid-mounted painting wastewater treatment equipment usually uses facilities such as grilles and regulating tanks to remove large suspended solids and grease in wastewater, creating favorable conditions for subsequent treatment. For high-concentration organic matter, the equipment will also use coagulation sedimentation or flotation treatment processes. By adding coagulants and coagulants to the wastewater, suspended matter, colloids and some organic matter are condensed into larger particles, which are precipitated to the bottom by gravity to achieve solid-liquid separation. Flotation treatment uses tiny bubbles to adhere to oil droplets and suspended matter in wastewater, causing them to float to achieve solid-liquid separation, and some organic matter will also float and be removed.Deep degradation in the biological treatment stage: Although the organic matter concentration of wastewater after pretreatment is reduced, it may still contain a high concentration of difficult-to-degrade organic matter. At this time, skid-mounted painting wastewater treatment equipment will use biological treatment technology for deep degradation. Biological treatment technologies such as activated sludge method and biofilm method convert organic matter in wastewater into harmless carbon dioxide and water through the metabolism of microorganisms. For high-concentration organic matter, the equipment usually adopts anaerobic-aerobic (A/O) biochemical treatment process. In the anaerobic treatment stage, anaerobic bacteria degrade organic matter into methane and carbon dioxide, while improving the biodegradability of wastewater; in the aerobic treatment stage, aerobic bacteria further degrade organic matter and reduce COD concentration.Further purification in the deep treatment stage: For wastewater that still contains refractory organic matter after biological treatment, skid-mounted painting wastewater treatment equipment will also use deep treatment technology for further purification. Membrane bioreactor (MBR) technology is an efficient deep treatment technology that uses the efficient interception effect of the membrane to further remove suspended matter, colloidal substances and some refractory organic matter in wastewater after biochemical treatment. In addition, advanced oxidation technologies such as Fenton reaction and ozone oxidation can also be used to treat refractory organic matter, decomposing organic matter into small molecular organic matter or completely mineralizing it into carbon dioxide and water through strong oxidizing free radicals.Skid-mounted painting wastewater treatment equipment, with its high efficiency, flexibility and integration, has demonstrated strong treatment capabilities in dealing with high-concentration organic matter in painting wastewater. Through multi-stage comprehensive treatment processes such as pretreatment, biological treatment and deep treatment, the equipment can effectively remove organic matter in wastewater and ensure that the effluent quality meets national and local emission standards. At the same time, the modular design and intelligent control system of the equipment also greatly reduce its operation and maintenance costs, improving the economic and environmental benefits of the enterprise.
