Biodegradation kinetics during different start up of the anaerobic tapered fluidized bed reactor

Kinetic study for different start up conditions of the anaerobic digestion of wastewater derived from the sago processing from tubers of tapioca (Mannihot utillisema) is discussed. The experiment is carried out with synthetic waste water using a tapered fluidized bed reactor. Mesoporous granulated activated carbon is used as a bacterial support. The kinetic model follows half order kinetics for substrate utilization and for methane formation and it exhibits an order of 0.20 during the start up of the reactor without acclimatization. For the remaining start up with acclimatized sludge, kinetic parameters are expressed in terms of Langmuir-Hinshelwood kinetics for the substrate utilization. The methane formation kinetics follows an order of the reaction as 0.30. The values of the kinetic constants are in the range of 0.13–0.21.