Page 9 - SIMPLIFIED WASTEWATER TREATMENT FUNDAMENTALS_ Advanced Nitrification P1
P. 9
Advanced Nitrification
Nitrifier Biology cont.
The second stage of nitrification is crucial. Nitrite (NO2) is the
food source for Nitrobacter.
Nitrobacter converts Nitrite (NO2) to Nitrate (NO3) and more
Nitric Acid (HNO3). However, Nitrates do not produce
chloramines and interfere with free chlorine residual.
Aeration Basin pH will continue to drop if the alkalinity is not
sufficient. Oftentimes, wastewater facilities need to add alkalinity
with Calcium (Lime), Sodium Hydroxide, or Magnesium Oxide.
