Production of propionic acid by microbiological way. Part 1. Influence of the initial sugars and product concentrations

Abstract

The best yields and productivities of 0.38 g . g-' and 0.35 g . I-' h-I, respectively, for the propionic acid production in a batch system using sugar-cane final molasses as carbon source were obtained when an initial TRS concentration of 50 g . I-' was used.It was obvious that this process is severely inhibited by the acids produced and the most drastic effect (p = 0) was at a TVA concentration near to 250 mmol . I-', independently of the initial TRS concentration employed. A generalizated equation of noncompetitive inhibition was adjusted:and kinetic inhibition constants for each initial TRS concentration studied were estimated.

Green and economical production of propionic acid by Propionibacterium freudenreichii CCTCC M207015 in plant fibrous-bed bioreactor

“…Thus, cane molasses is also expected to be a suitable material for propionic acid production. However, the maximum concentration of propionic acid is only 30 g l -1 when cane molasses is used as a carbon source (Obaya et al, 1992;Quesada-Chanto et al, 1994). There remains a need to find an effective process to enhance the propionic acid production from cane molasses.…”

Influence of different vitamin‐nitrogen sources on cell growth and propionic acid production from sucrose by Propionibacterium shermanii

“…limitation of some important nutrient(s), as cited by OBAYA et aL [17]. Different critical concentrations of propionic acid (acid concentration that suppresses all growth (px = 0)) have been cited.…”

“…Different critical concentrations of propionic acid (acid concentration that suppresses all growth (px = 0)) have been cited. Using 4 gA yeast extract and whey as the substrate, BLANC and GOMA [15] found 16 g/l and OBAYA et al [17], using 8 gh yeast extract and sucrose as the carbon source, found 13.5-14.0 g/l propionic acid to be the critical concentration. As can be seen in Tab.…”