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This article provides a comprehensive analysis of the technical principles, advantages, and disadvantages of integrated wastewater treatment equipment: Main process flow: 1. A process centered on biological treatment. II. A process centered on physicochemical methods. III. A combined process flow that integrates biological and physicochemical methods. It consists of six parts in total: 1. Primary sedimentation tank ； 2. Contact oxidation tank ； 3. Secondary sedimentation tank ； 4. Disinfection tank, disinfection device ； 5. Sludge tank ； 6. Fan room, fans. Structure and Features This device is installed underground, which makes maintenance and repair difficult; therefore, its maintenance-free nature was taken into account during the design process. The overall structure of the device is rational and reliable, and it is also designed so that access to the interior of the device is possible through various inspection holes, even in the event of some failures. All components of the equipment are housed within several cabinets; these cabinets are made of A3 steel plates, and they are connected to each other using seamless steel pipes. Both the interior and exterior of the equipment are coated with chlorosulfonated polyethylene anti-corrosion paint, a product promoted by the Ministry of Chemical Industry. The anti-corrosion lifespan is generally over 10 years. The above is my analysis of this issue; please correct me if there are any mistakes! The information comes from Fengqiu Kri