Which contaminant is most directly removed by a properly designed sedimentation basin?
Correct answer: D. Settleable suspended solids
- A. Most dissolved chloride ions
- B. Dissolved hardness ions
- C. Volatile organic gases
- D. Settleable suspended solids
Explanation
Sedimentation removes particles that can settle under gravity during the basin detention period. Dissolved salts such as chloride and hardness ions require different treatment processes.
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About Environmental Engineering
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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