Simulation modeling of primary clarifiers (case study of DOHA treatment plant)

Regression models for the removals of SS and BOD in the primary settling tanks at the Doha Municipal Wastewater Treatment Plant, in Qatar were established. The developed models adequately simulated the data. Despite disparities from existing models, the newly developed expressions for SS removal confirmed the findings of previous research, i.c., that removal efficiency is a function of the hydraulic loading rate and the influent SS. Although, the relatively few equations for BOD removal in primary clarifiers reported in the literature have established the correlation*between organic removal efficiency, on one hand, and influent BOD and SS removal on the other hand, the findings of this study suggested that the importance of additional parameter i.e., the over flowrate, must not be overlooked.