There are many kinds of sewage treatment equipment, and different types of equipment can be selected according to different treatment needs and processes. The following are some common types of sewage treatment equipment:

1. Pretreatment equipment:

- Grid decontamination machine: used to remove large solid substances in sewage.

- Sand water separator: remove sand particles from sewage.

2. Air flotation equipment:

- Air flotation machine: By producing tiny bubbles, the suspended matter in sewage is floated to the surface, and then removed.

3. Solid-liquid separation equipment:

Centrifuge: The centrifugal force generated by high-speed rotation is used to separate solid particles from liquid.

- Belt filter press, plate and frame filter press, etc. : solid-liquid separation is achieved through pressure filtration.

4. Aeration equipment:

Aeration devices (such as microporous aerators, diffused aerators, etc.) : used to fill the sewage with air or oxygen to promote the growth and activity of aerobic microorganisms.

5. Biological treatment equipment:

- Biological filter, biological turntable, etc. : the use of microorganisms to degrade organic matter.

- Activated sludge reactor: The activated sludge is cultured to degrade organic matter.

6. Disinfection equipment:

- Chlorine dosing equipment, ozone generator, etc. : used for disinfection of effluent, kill pathogenic microorganisms.

7. Other auxiliary equipment:

- Dosing device: used to add various chemical agents to sewage, such as flocculant, pH regulator, etc.

Sludge treatment equipment (such as sludge dewatering machine, sludge thickener, etc.) : used to treat the sludge generated in the sewage treatment process.

8. Integrated sewage treatment equipment:

- Buried integrated sewage treatment equipment: multiple treatment units are integrated in one equipment, usually buried underground, saving space.

These devices play their respective roles in the wastewater treatment process and usually need to be selected and combined according to factors such as the nature of the wastewater, treatment objectives and site conditions. In practical applications, it may also be necessary to customize or adapt the device to meet specific needs.