Table 3.2 Factors influencing the Nitrification Process and the section considering the this influence

Influence Section

Temperature 3.8

Dissolved Oxygen 3.9

pH 3.10

Bacterial Population Dynamics 3.12

Inhibitors 3.13

3.4 The Energy and Synthesis Relationship

The overall stoichiometric reactions in the oxidation of ammonia into nitrate can be summed upas follows:

Equations (3.1) and (3.2) serve as energy-yielding reactions for Nitrosomonas and Nitrobacter, respectively.

Equation (3.1) has been estimated by various investigators to yield a loss of free energy between 58 and 84 kcal per mole of ammonia.

Equation (3.2) has been estimated to release between 15.4 and 20.9 kcal per mole of nitrite. Thus, Nitrosomonas obtains more energy per mole of nitrogen oxidized than Nitrobacter.

The overall oxidation of ammonium is obtained by adding equations (3.1) and (3.2), providing equation (3.3).

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