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| Content Provider | Springer Nature Link |
|---|---|
| Author | Chen, Fei Feng, Xiao Hai Liang, Jin Feng Xu, Hong Ouyang, Ping Kai |
| Copyright Year | 2012 |
| Abstract | The effects of oxidoreduction potential (ORP) regulation on the process of propionic acid production by Propionibacterium freudenreichii CCTCC M207015 have been investigated. Potassium ferricyanide and sodium borohydride were determined as ORP control agents through serum bottle experiment. In batch fermentation, cell growth, propionic acid and by-products distribution were changed with ORP levels in the range of 0–160 mV. Based on these analysis results, an ORP-shift control strategy was proposed: at first 156 h, ORP was controlled at 120 mV to obtain higher cell growth rate and propionic acid formation rate, and then it was shifted to 80 mV after 156 h to maintain the higher propionic acid formation rate. By applying this strategy, the optimal parameters were obtained as follows: the propionic acid concentration 45.99 g L−1, productivity 0.192 g L−1 h−1, the proportion of propionic acid to total organic acids 92.26 % (w/w) and glycerol conversion efficiency 76.65 %. The mechanism of ORP regulation was discussed by the ratio of NADH/NAD+, ATP levels, and metabolic flux analysis. The results suggest that it is possible to redistribute energy and metabolic fluxes by the ORP-shift control strategy, and the strategy could provide a simple and efficient tool to realize high purity propionic acid production with glycerol as carbon source. |
| Starting Page | 1165 |
| Ending Page | 1176 |
| Page Count | 12 |
| File Format | |
| ISSN | 16157591 |
| Journal | Bioprocess Engineering |
| Volume Number | 36 |
| Issue Number | 9 |
| e-ISSN | 16157605 |
| Language | English |
| Publisher | Springer Berlin Heidelberg |
| Publisher Date | 2012-10-30 |
| Publisher Place | Berlin, Heidelberg |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Propionic acid Glycerol Propionibacterium freudenreichii CCTCC M207015 Oxidoreduction potential shift control strategy NADH/NAD+ and ATP Metabolic flux analysis Biotechnology Industrial and Production Engineering Environmental Engineering/Biotechnology Industrial Chemistry/Chemical Engineering Food Science |
| Content Type | Text |
| Resource Type | Article |
| Subject | Medicine Bioengineering Biotechnology |
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