Ace the California Wastewater Treatment Operator Exam 2026 – Dive In and Purify Your Career!

Question: 1 / 400

Which statement best describes the role of ozonation in wastewater treatment?

It helps in settling out solids

It disinfects by oxidizing organic matter

Ozonation is a process used in wastewater treatment that primarily serves the purpose of disinfection. By introducing ozone, a strong oxidizing agent, to the water, it effectively breaks down and oxidizes organic matter, pathogens, and some inorganic pollutants. This action not only kills bacteria and viruses but also reduces harmful organic compounds, thereby improving the overall quality of the treated water.

The use of ozone is particularly beneficial because it leaves no harmful residues, which can be an issue with other disinfection methods. Ozone decomposes back into oxygen shortly after its application, making it an environmentally friendly choice. Therefore, its role is precisely focused on disinfection through the oxidation of organic matter, distinguishing it from other wastewater treatment processes that may focus on solid removal, pH stabilization, or nutrient enhancement.

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It stabilizes pH levels

It enhances nutrient content for reuse

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