Influence of OUR endogenous determination on the KLa, OUR exogenous, total oxygen consumption and heterotrophic yield in a continuous respirometric test

In wastewater treatment, waste removal and biomass activity are important processes which need to be monitored for good process control. The difficulties in the interpretation of the total COD, BOD, and VSS measurements encouraged the development of respirometric methods for assessing the kinetic constants. Respirometry is an important technique in assessing the biological reaction in wastewater treatment. K_La is, however, a key constant in evaluating the other parameters therefore particular attention should be considered when determining it. The determination of K_La is conditioned by OURend evaluation, which is supposed to be constant in the writing of dissolved oxygen equations. Consequently, this paper considers the influence of the region, on the DO curve, where OURend is evaluated on K_La calculations, OURexo, the total Oxygen consumption and heterotrophic yield (Y_H)·.