The main function of an equalization basin in wastewater treatment is to:
Correct answer: A. Smooth variations in flow and pollutant load
- A. Smooth variations in flow and pollutant load
- B. Remove coarse solids from incoming sewage
- C. Disinfect the final treated effluent
- D. Digest excess sludge under anaerobic conditions
Explanation
An equalization basin stores wastewater temporarily and releases it at a more uniform rate and composition. This protects later treatment units from sudden hydraulic or organic loading changes.
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Environmental engineering examines water supply, water quality, treatment processes, wastewater collection and treatment, solid waste management, air pollution and public health protection. It covers sedimentation, coagulation, filtration, disinfection, biological treatment and disposal methods, while distinguishing drinking-water treatment from sewage treatment and BOD from COD.
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