Engineering Board Exam Reviewer · Environmental Engineering · medium
Nitrification in wastewater treatment converts:
- Nitrate to nitrogen gas
- Organic nitrogen to ammonia
- Nitrogen gas to ammonia
- Ammonia to nitrite and then to nitrate
Answer
D. Ammonia to nitrite and then to nitrate
Solution
Carried out by Nitrosomonas and Nitrobacter bacteria under aerobic conditions.
More Environmental Engineering questions
- The sludge volume index (SVI) is used to evaluate the:
- Sludge bulking in the activated sludge process is commonly caused by:
- Trihalomethanes (THMs) in drinking water are formed when:
- Breakpoint chlorination is the point at which:
- A BOD/COD ratio of about 0.5 or higher in a wastewater suggests that it is:
- Which water quality parameter is most directly used to assess the organic pollution load of wastewater?
- In the Streeter–Phelps model, the DO deficit is affected by:
- The 'oxygen sag curve' (Streeter–Phelps) describes:
- A worker is exposed to 95 dBA for 2 hours (permitted 4 h) and 90 dBA for 3 hours (permitted 8 h). What is the total noise dose, and is it…
- Under a 3-dB exchange rate with an 8-hour limit of 85 dBA, what is the allowable daily exposure time at 94 dBA?