Possibilities of wastes utilization in the propionic acid fermentation process
2009
Kosmider, A. | Drozdzynska, A. | Czaczyk, K.,Uniwersytet Przyrodniczy, Poznan (Poland). Katedra Biotechnologii i Mikrobiologii Zywnosci
In this paper, the potential was studied of utilizing pure glycerol, crude glycerol, and whey as a source of carbon in the biosynthesis process of propionic acid run by Propionibacterium freudenreichii ssp.shermanii. Furthermore, the efficiency of the process with a culture on standard medium was compared with the process with a propionic bacteria culture. Based on the analysis performed, it was found that the highest concentration of propionic acid (13,7g/l) was obtained when a medium with pure glycerol as a source of carbon was applied. With other carbon sources applied: crude glycerol, whey, and their combination, the propionic acid production level was similar to the results obtained using a conventional source of carbon, i.e. glucose, and amounted to 10,5g/l on average. It was also found that with the waste sources used, the fermentation time was extended
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