Kinetics of diffusion‐coupled fermentation processes: The conversion of cellulose to protein

A combination of Fickian diffusion and Michaelis–Menten kinetics is proposed to describe the rate of diffusion‐coupled biochemical reactions. This postulate leads to a nonlinear mathematical model which is solved by a perturbation technique. The result is a relation which permits identification of zones of relative diffusion or reaction influence. The conversion of cellulose to protein by Myrothecium verrucaria is a heterogeneous process that is well‐suited to this type of analysis, although the data requirements are severe.