Nitrification in wastewater treatment converts:
Correct answer: C. Ammonia nitrogen into nitrate nitrogen
- A. Sulphate into hydrogen sulfide
- B. Nitrate nitrogen into nitrogen gas
- C. Ammonia nitrogen into nitrate nitrogen
- D. Carbon dioxide into methane
Explanation
Nitrification is an aerobic biological process in which ammonia is oxidized first to nitrite and then to nitrate. Conversion of nitrate to nitrogen gas is called denitrification, which occurs under anoxic conditions.
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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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