ABSTRACT
Because of the complexity associated with the effects of dissolved oxygen on anoxic growth of heterotrophic bacteria, and because all effects have not been clearly defined, relatively simple models have been used to express them. 11 •54•55 A popular approach has been to use Eq. 3.46 to depict the simultaneous effects of organic substrate (Ss), and nitrate (SNo) on µ and to add a third term which diminishes µ as the dissolved oxygen concentration, S0 , increases:
(3.48)
The third term is the function most commonly used to depict the effects of a classical noncompetitive inhibitor as modeled in enzyme kinetics. 125 The parameter Kro is the inhibition coefficient for oxygen.
