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Continuous co-production of biomass and bio-oxidized metabolite (sorbose) using Gluconobacter oxydans in a high-oxygen tension bioreactor
- Zhou, Xin, Hua, Xia, Zhou, Xuelian, Xu, Yong, Zhang, Wenxuan
- Bioresource technology 2019 v.277 pp. 221-224
- Gluconobacter oxydans, biomass, bioprocessing, bioreactors, cell proliferation, culture media, industrial applications, metabolites, oxygen, sorbitol, sorbose
- High-efficiency cell proliferation of Gluconobacter oxydans was carried out in a compressed oxygen supply and sealed bioreactor to co-produce biomass and corresponding metabolite (sorbose). Higher cell density of Gluconobacter oxydans was achieved by implementing high-oxygen tension supply strategy resulting into high sorbose production from bio-oxidation of sorbitol. The highest biomass of 8.8 g/L and highest sorbose production of 432.8 g/L were simultaneously obtained after 72 h of fed-batch operation. Moreover, continuous co-production of biomass and sorbose was successfully conducted with retaining 10% sorbitol fermentation broth as the seed of next stage culture. The key features of this bioprocess application would enable cost-competitive Gluconobacter oxydans industrial applications.