Objective To establish the kinetics model to describe the polysaccharide batch fermentation by N. meningitidis group C,and provide a theoretical basis for control,optimization and scale-up of process of polysaccharide fermentation of N. meningitidis group C. Methods Cell growth model was established by Logistic equation,while polysaccharide biosynthesis model by Leudedeking-Piret equation and consumptic model of substrate by equation of substrate balance. The parameters of models were calculated by using Or...