Fig. 4

Effect of initial GA concentration on 2KGA production. a The initial GA concentration were 320, 380, 420 and 480 g/L, respectively. Cell concentration was 30 g_{(wet wt)}/L. GA (open); 2KGA (filled), b Initial GA concentration 480 g/L; cell concentration 60 g_{(wet wt)}/L. GA (open); 2KGA (filled). c DO profile during the batch bioconversion, cell concentration 30 g_{(wet wt)}/L