Spray painting wastewater treatment equipment

Overview of Spray Paint Wastewater:

Spray painting wastewater mainly comes from washing the air in the working area of the wet spray painting room with water, and the paint and organic solvents in the air are transferred to the water to form spray painting wastewater. The wastewater contains a large amount of paint particles, and its water quality depends on the coatings used (mainly nitro paint, amino paint, alkyd paint, and epoxy paint), solvents (such as ethanol, acetone, esters, benzene), and additives.

There are two forms of wastewater: one is that a portion of the circulating water is discharged as wastewater and sufficient fresh water is replenished; The second is that the water is completely renewed after a certain cycle of use. Although there is a difference in the degree of pollution between the two methods, both wastewater treatment methods first remove the floating slag, then coagulate it with aluminum salts, and use precipitation or flotation treatment to remove most of the pigments and resins in the coating, and a portion is treated with surfactants. Some resin and solvent remain in the treated water, and the chemical oxygen demand and biochemical oxygen demand still show high levels, which should be further treated. The pre treated effluent is discharged into the comprehensive wastewater collection tank and can be treated together with other wastewater. Treatment methods include oxidation, coagulation, activated sludge treatment, biological treatment, etc. Jiangsu Huashui Environmental ProtectionSpray painting wastewater treatment equipmentWe can effectively solve the problem of wastewater in the spray painting industry, and our professional team provides you with worry free service!

Process description of Huashui Environmental Protection Spray Painting Wastewater Treatment Device:

Spray painting wastewater first passes through a scum separation tank to remove impurities such as scum and floating oil from the wastewater, and then enters a regulating tank for homogenization, water quantity and quality adjustment. It is then pumped to an air flotation device where coagulants and coagulants are added for solid-liquid separation. The wastewater then enters a comprehensive regulating tank, while the scum is discharged into a sludge concentration tank. inSpray painting wastewater treatment equipmentIn the comprehensive regulation tank, low concentration and good biodegradability domestic sewage and high concentration and poor biodegradability spray painting wastewater are fully homogenized and the water volume is adjusted. They are then pumped to the anaerobic tank, where the sewage enters synchronously with the phosphorus containing return sludge discharged from the first sedimentation tank. While releasing a large amount of phosphorus in the anaerobic tank, some organic matter is ammoniated. The water treated in the anaerobic tank flows into the anoxic tank, where denitrifying bacteria convert the nitrate brought in by the return into nitrogen through biological denitrification and discharge it into the atmosphere, thus achieving the purpose of denitrification. The effluent from the anoxic tank enters the two-stage aeration tank for aerobic treatment. Due to the high concentration of wastewater, the residence time is set at 9-10 hours for biodegradation, nitrification reaction, and phosphorus absorption. The sludge generated by the biochemical system is pumped into the anaerobic tank by a sludge pump, and the sludge in the system is digested and decomposed by microorganisms to reduce the discharge of sludge. The remaining sludge is discharged into the sludge concentration tank, and after concentration to reduce volume, it is pressed into a sludge cake by a belt filter press and transported for disposal. The filtrate flows back into the regulating tank.

Company Profile

Jiangsu Huashui Environmental Protection Equipment Co., Ltd. is located in Suzhou Technological Industry Development Zone with beautiful environment and advanced technology. It is adjacent to the ancient city of Suzhou in the east and the shore of the Taihu Lake Lake in the west. It is a new technology environmental protection engineering enterprise that integrates design, equipment manufacturing, engineering construction, installation and commissioning, and facility operation. The company's main business is the treatment of waste gas and wastewater from industrial and mining enterprises, including smoke removal, dust removal, odor removal, oil removal, and noise reduction. Specializing in odor control during construction decoration, sewage, and garbage treatment processes; Provide users with environmental pollution control technology and project solutions. In recent years, the company has undertaken multiple waste gas treatment and environmental protection projects across the country, all of which have successfully passed the relevant national standard acceptance. Our business covers many industries such as textiles, printing and dyeing, leather making, food and beverage, metallurgical machinery, electroplating, pharmaceuticals, and chemical engineering, with a large number of excellent achievements. The company adheres to the combination of scientific research, design, and production services in its development process, occupying the market with new mechanisms, new thinking, and new technologies, and achieving good results. Our company is a product manufacturer and can design and manufacture according to various technical requirements raised by users. If you need to customize non-standard products, you can provide technical requirements according to your needs, so that our technical personnel can design better configurations for you and provide you with more suitable products. Welcome customers to inquire about related matters, we will wholeheartedly serve you and be highly appreciated by our customers! Welcome all users to call or write to inquire!