KINETIC COEFFICIENTS OF SUBSTRATE UTILIZATION AND BIOMASS GROWTH IN THE BIO-DEGRADATION OF PETROLEUM REFINERY WASTEWATER IN AN ACTIVATED SLUDGE PROCESS

  • O.J. Momoh
  • P.C. Okonkwo
  • L.C. Edomwonyi-Otu

Abstract

A study of the kinetics of petroleum refinery wastewater biodegradation in an activated sludge process was carried out in a 25 L bio-reactor, for a time range of 2-10 hours hydraulic retention. Substrate utilization and microbial growth rate were monitored at various hydraulic retention time which shows corresponding increase in microbial growth and coliform count with substrate utilization. Analysis of the results obtained using the Monod and the modified Monod kinetic model gave the following bio-kinetic parameters: Maximum Substrate Utilization Rate= 4.4 day-1, Half Saturation Constant=275 mg/L, Yield Coefficient=0.5083 mgVSS/mgBOD and Endogenous Decay Constant=0.003 day-1.

Author Biographies

O.J. Momoh

Department of Chemical Engineering, Ahmadu Bello University, Zaria

P.C. Okonkwo

Department of Chemical Engineering, Ahmadu Bello University, Zaria

L.C. Edomwonyi-Otu

Department of Chemical and Petroleum Engineering, Delta State University, Abraka

Published
2020-09-01