Wastewater treatment equipment can be broadly categorized into pretreatment equipment, biological treatment equipment, and sludge treatment equipment. Pretreatment equipment primarily includes screening devices, sand settling equipment, sand discharge equipment, sedimentation equipment, and flotation equipment. Biological treatment equipment mainly encompasses aeration equipment, skimmers, biofilm wastewater treatment equipment, anaerobic wastewater treatment equipment, and typical auxiliary equipment for anaerobic缺氧 treatment. Sludge treatment equipment mainly includes sludge discharge equipment, sludge concentration equipment, anaerobic digestion equipment for sludge, and sludge dewatering and drying equipment. Among these, many devices also incorporate fluid conveyance machinery and equipment, such as pumps, valves, fans, and compressors.