Physical processing stage: During the initial start-up of the equipment, the sewage first flows through the grid. Using the principle of physical screening, larger suspended solids in the sewage, such as tree branches, plastic sheets, paper, etc., are intercepted to prevent them from entering the subsequent processing unit and causing blockage or damage to the equipment. Next, the sewage enters the sedimentation tank, and under the action of gravity, solid particles with higher density gradually settle to the bottom of the tank, achieving preliminary solid-liquid separation and reducing the turbidity of the sewage.

Biological treatment process: This is the core part of integrated sewage treatment equipment. Taking activated sludge process and biofilm process as examples, in the activated sludge tank, activated sludge containing a large number of microorganisms is fully mixed and contacted with sewage. Microorganisms feed on organic matter in wastewater and, through their own metabolic activities, decompose and convert it into carbon dioxide, water, and their own cellular substances, thereby achieving efficient removal of organic matter from wastewater. In the biofilm method, microorganisms attach and grow on the surface of the filler, forming a layer of biofilm. When sewage flows through biofilms, pollutants are adsorbed and decomposed by microorganisms. Due to the large specific surface area of biofilm, it can provide more attachment sites for microorganisms, thus significantly improving the contact efficiency between sewage and microorganisms and enhancing the treatment effect.

Deep processing stage: After biological treatment, although most of the organic matter in the wastewater has been removed, it may still contain trace amounts of harmful substances and bacteria. At this point, the equipment will use advanced treatment technologies such as filtration, adsorption, and ion exchange to further purify the water quality. For example, filtering through a sand filter to remove residual fine particles in wastewater; Using activated carbon adsorption to remove odors, pigments, and some dissolved organic compounds from water; By using ion exchange resin, specific ions such as heavy metal ions are removed from wastewater to ensure that the final effluent water quality meets stable standards.