Kinetic Evaluation of Petroleum Refinery Wastewater Biodegradation in an Activated Sludge Process


  • Ojames Momoh Ahmadu Bello Unuiversity, Zaria
  • Paul Chidi Okonkwo Department of Chemical Engineering, Ahmadu Bello University, Zaria
  • Lawrence C. Edomwonyi-Otu Department of Chemical and Petroleum Engineering, Delta State University


Biodegradation, Kinetic, Petroleum refinery, Wastewater, Activated sludge


Experimental assessment of process kinetic is essential for process modelling and can serve as a useful tool to improve process performance. In this study, kinetic evaluation of petroleum refinery wastewater (PRWW) biodegradation in an activated sludge process (ASP) was carried out in a 25 L ASP reactor which was operated within the conventional aeration mode of 2-10 hours, hydraulic retention time (HRT), effluents from the secondary sedimentation tank were analyzed at various HRT for biochemical oxygen demand (BOD) and biomass growth. The data obtained were analyzed and fitted to different related kinetic models which show that the biodegradation of PRWW in ASP follows the Modified Monod Kinetic Model, amongst the related models evaluated, with 0.9745 correlations with the experimental data. Physicochemical characterization of the PRWW used for the study was carried out using the Standard Methods for the Examination of Water and Wastewater; which gave a biodegradability index of 0.3333.






Chemical, Industrial, Materials, Mechanical, Metallurgical, Petroleum & Production Engineering