Research Article

High Improvement in Lactic Acid Productivity by New Alkaliphilic Bacterium Using Repeated Batch Fermentation Integrated with Increased Substrate Concentration

Figure 4

Lactic acid production by E. hirae BoM 1-2 in repeated batch fermentation (1–11 runs) with initial glucose concentration of 60 g L−1 at the first 10 runs and 100 g L−1 at run 11, pH 9.0 at 40°C. (a) Cell growth. (b) Residual glucose and lactic acid concentration. Symbols: ▲, OD; ■, residual sugar; □, lactic acid.
(a)
(b)