Name a common method of chemical treatment used in wastewater treatment plants.

Ozonation is a common method of chemical treatment in wastewater treatment plants. This process involves the use of ozone, a powerful oxidizing agent, to degrade organic pollutants and disinfect wastewater. Ozone has the ability to oxidize a wide range of contaminants, including pathogens, which makes it effective for disinfection without leaving harmful residues like some chemical disinfectants.

The appeal of ozonation lies in its ability to effectively reduce the concentration of various pollutants and improve the overall quality of the treated water. It's particularly advantageous in applications where residual chemicals must be minimized or where advanced oxidation processes are beneficial in breaking down complex organic materials.

Other treatment methods mentioned, like chlorination, also play significant roles in wastewater treatment. While chlorination is a widely used disinfectant, it can produce by-products that may have negative health effects. Filtration and incineration serve different purposes in the treatment process; filtration is primarily a physical process, while incineration is used for reducing solids and organic materials rather than chemical treatment of treated water.