Kinetic Modeling of Anaerobic Digestion of Restaurant Waste Water

This work presents the treatment of Restaurant wastewater using anaerobic digestion technique. The physicochemical analysis revealed that most of the wastewater parameters were reduced after digestion to an acceptable level. The bio-kinetics of the anaerobic digestion was well described by the first-order kinetic model. The kinetic parameters calculated for the batch digestion process were 0.0494 day-1 for K, 108.96 mg/l for Ks, 0.0282 day-1 for Kd, 1.5886 mg/mg for Y and 0.0789 day-1 for µmax. The kinetics of the biomass growth and substrate utilization rate together with the kinetic data obtained were used to develop a mathematical model for a continuous flow reactor unit under homogeneous steady state condition. As the food to micro-organism ratio increased, there was a decrease in the biomass concentration and an increase in the hydraulic retention time. The developed design data can be used in the design of the continuous process plant.