Figure 2

Simulation of batch fermentation conversion of lactose to lactic acid using wild type L. bulgaricus. The initial conditions were 43 °C 8% of skim milk concentration (without pH value control) and 4% of inoculum ratio. The dots and triangles indicated the measured concentration of lactose and lactic acid in the medium, respectively, every two hours. The curves were the simulated results of lactose and lactic acid concentration in 8 hours.