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Table 7 Instantaneous and specific rates of the three sequential sorbitol fermentation batches using P. acidipropionici operating in four independent vessels

From: Microbial production of Propionic and Succinic acid from Sorbitol using Propionibacterium acidipropionici

  First batch Second batch Third batch
rS = −dS/dt (g h−1) −0.224 −0.272 −0.250
rSA = dP/dt (g h−1) 0.022 0.036 0.053
rAA = dP/dt (g h−1) 0.012 0.008 0.007
rPA = dP/dt (g h−1) 0.137 0.114 0.109
rx = dX/dt (g h−1) 0.082 0.089 0.070
μs = 1/X(−dS/dt) (h−1) −0.039 −0.044 −0.051
μSA = 1/X(dP/dt) (h−1) 0.004 0.006 0.011
μAA = 1/X(dP/dt) (h−1) 0.002 0.001 0.001
μPA = 1/X(dP/dt) (h−1) 0.024 0.018 0.022
μx = 1/X(dX/dt) (h−1) 0.014 0.014 0.014
  1. S: substrate (sorbitol); SA: succinic acid; AA: acetic acid; PA: propionic acid; X: cells.