**9. Conclusion**

Wastewater treatment is a process in which wastewater (water that is no longer needed or suitable for use) is converted into water that can be restored to the environment and drained in the wild. Wastewater treatment procedures are carried out in 3 ways: chemical treatment, physical treatment and biological treatment.

Physical treatment of wastewater is when physical and mechanical properties and separation and removal of external particulate matter from wastewater are used. Littering, grading, floating, sequestration and other processes are examples of these.

Physical wastewater treatment is the first step in industrial and sanitary wastewater treatment and not only improves the effectiveness of subsequent processes, but also protects chemical and biological treatment equipment. The equipment and techniques used in physical wastewater treatment vary depending on the type of wastewater and the quality of the wastewater.

Physical methods of water and wastewater treatment include different stages of settling, filtration, and aeration that were discussed in this chapter.
