Sewage treatment plants generally contain the following equipment:

1. Pretreatment equipment:

- Grille: used to remove large particles of solid matter in sewage.

- Sand tank and oil tank: used to remove impurities such as sand and oil.

2. Primary processing equipment:

- Sedimentation tank: through physical precipitation to remove solid suspended matter, sediment and other substances in sewage.

- Air floats: further removal of suspended solids and plankton from sewage.

3. Intermediate processing equipment:

- Activated sludge process and other biological treatment equipment: use microbial action to degrade and decompose organic matter, nitrogen, phosphorus and other substances in sewage.

4. Advanced processing equipment:

Chemical and physical treatment equipment, such as precision filtration, reverse osmosis, etc., for the treatment of small particles and dissolved substances that remain after primary and intermediate treatment.

5. Other important equipment:

- Filter, filter press: for further filtration and purification of water.

- Sewage pump, aeration fan: used for sewage transport and oxygenation.

- Dosing device, sewage disinfection device: used to add chemicals to sewage for disinfection and treatment.

- Online monitoring device: real-time monitoring of various indicators in the sewage treatment process.

6. Electrical equipment: including AC /DC motors, lighting equipment, lightning protection equipment, etc., to provide power and lighting for sewage treatment plants.

7. General equipment: such as electric hoist, oven, centrifuge, etc., for daily maintenance and operation of sewage treatment plants.

Please note that the configuration of the specific equipment may vary depending on factors such as the size of the wastewater treatment plant, treatment process and water quality requirements. In practical applications, the selection and configuration of equipment should be carried out according to the actual situation and requirements.

In addition, the sewage treatment plant also includes some civil engineering parts, such as septic tanks, regulating tanks, biochemical tanks, etc. These facilities together with the above equipment constitute a complete sewage treatment system.