Development Of A Mathematical Model To Estimate Dissolved Oxygen Concentration Profile And l K a In Solid _State Fermentation

Oxygen mass transfer in aerobic microbial growth systems is often a limiting factor for optimal growth and productivity. In this paper a mathematical model based on inlet and outlet gas concentrations has been developed to estimate overall oxygen transfer coefficients l k a in a packed_bed solid state fermentation ,In order to provide gaseous oxygen concentration in the height of bed reactor,three equations have been applied : 1) the conservation equation in gas phase , 2) the logistic equation model for growth of microorganism on the solid , 3) the oxygen consumption rate equation with linear growth model. The use of l k a traditionally defined ,should be used with caution in solid substrate fermentation systems because there is no convection on the liquid side of the medium , and oxygen is consumed in the biofilm .Hence, l k a must be defined for solid state fermentation , was used a pseudo_steady state model for estimating of overall oxygen mass transfer coefficient.

کلیدواژه ها:

solid_state fermentation ، biofilm ، dissolved oxygen concentration profiles ، l k a