California Wastewater Treatment Operator Practice Exam

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Prepare for the California Wastewater Treatment Operator Exam with our comprehensive quiz. Test your knowledge with multiple-choice questions covering various topics in wastewater treatment. Get ready to ace your exam!

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What is the purpose of air flotation in wastewater treatment?

To introduce oxygen to aerobic bacteria
To remove suspended solids using air bubbles
To disperse pathogens evenly
To increase sedimentation rates

The correct answer is: To remove suspended solids using air bubbles

The purpose of air flotation in wastewater treatment is to remove suspended solids using air bubbles. This process involves the injection of air into the wastewater, creating tiny bubbles that adhere to suspended particles. As these bubbles rise to the surface, they carry the particles with them, resulting in the formation of a froth or scum layer on top of the water. This layer can then be removed, effectively reducing the concentration of suspended solids in the effluent. This method is particularly useful for the removal of light, buoyant solids that may not settle well during traditional sedimentation processes, enhancing overall wastewater treatment efficiency. Additionally, air flotation can facilitate the removal of grease, oils, and other surface-scum-forming substances, further improving water quality.