MODELING OF BOD EXERTION CURVE

The BOD exertion phenomenon, being a result of complex biochemical reactions between the heterogeneous assemblage of biota and the complex organic substrate, shows a lag phase, followed by a rising curve terminated at a plateau, and again a saturating type increasing curve yielding an ultimate carbonacious BOD. For the substrate rich in nitrogenous compounds, there is a further increase in the BOD curve, saturating at the second stage ultimate BOD value. The BOD kinetics models in vogue describe a particular phase or stage only, and lack in general applicability over the entire exertion process. Presented herein is a generalized BOD exertion equation valid over all the phases and stages of the phenomenon.