What is the main purpose of aeration in drinking-water treatment?
Correct answer: B. To add oxygen and strip unwanted gases
- A. To increase water hardness by adding minerals
- B. To add oxygen and strip unwanted gases
- C. To remove settled grit from raw water
- D. To destroy all organisms by heating
Explanation
Aeration brings water into contact with air, adding oxygen and helping remove gases such as hydrogen sulfide and carbon dioxide. It can also assist in oxidizing dissolved iron and manganese before later removal.
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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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