WASTEWATER
Nitrosomonas and Nitrobacter bacteria perform what function in the activated sludge process?
A. They are responsible for denitrification.
B. They are required for restoring alkalinity to the process.
C. They convert the nitrate into nitrous oxide and nitrogen gas.
D. They convert ammonium into nitrite and nitrate.
Answer: D. Nitrosomonas and Nitrobacter are responsible for nitrification, the oxidation process where ammonium is first converted to nitrite, and then the nitrite is further oxidized to nitrate. Nitrification occurs mostly within an aerated basin like an aeration tank, but it can occur in other aerated locations like wetlands, rivers and streams, and within soils. We refer
