Study on A New Method of Propionic Acid Flocculated Fermentation

Abstract:

This paper reports the flocculated fermentation as a new method of propionic acid production.Propionibacterium shermanii W125 were used，29.0g/L propionic acid was accumulated in batch fermentation.In the subsequently established fed batch semicontinous fermentation，35.4g/L propionic acid was accumulated，raised to 122% and the conversion rate of glucose to propionic acid reached 51.56%，the volumetric productivity reached 0.37g/（L/h）during the 250 hours running cycle.