Question
Describe nitrification along with the equations and the organisms involved in each step.

Answer

  1. Nitrification is the process of oxidation of ammonia, first into nitrite and then into nitrate.
  2. Ammonia is oxidised into nitrite, by bacteria like Nitrococcus and Nitrosomonas.
$2\text{NH}_3+3\text{O}_2\xrightarrow{\ \ \ \ \ }2\text{NO}_{2}^{-}+2\text{H}^++2\text{H}_2\text{O}$
  1. Nitrite is further oxidised to nitrate with the help of bacteria Nitrobacter.
$2\text{NO}_2+\text{O}_2\xrightarrow{\ \ \ }2\text{NO}_3$

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