KINETIC MODEL FITTING FOR ANAEROBIC CO-DIGESTION OF CHIBUKU BREWERY WASTE GRAIN WITH COW DUNG ......

In a 1000 cc capacity Erlenmeyer flask at mesophilic conditions, the anaerobic co-digestion of 25% wt cow dung in chibuku brewery waste was studied to assess its biogas potential and model fit its kinetics. The data revealed that the first biogas production occurred 5 hours after the start-up, peaked on the seventh day, and then ended on the eighth. In addition, the theory of chemical kinetics was applied to match the biogas process. The fractional yield was calculated using data on the effect of time on biogas yield. The fractional yield was then utilised to fit the process to kinetic models of the first, second, and third orders of reaction using linear regression. As a result, the first order kinetics were discovered to closely fit the kinetics with a rate constant of 0.4350 s-1 for the biogas process occuring in slurry at 355°C. A linear regression coefficient of 0.8384 best fit this rate constant. The research presents a method for calculating the rate constant that might be employed in the reactor design of an anaerobic co-digester.

Please see the link :- https://www.ikprress.org/index.php/JACSI/article/view/3432