| 摘要 |
1514425 Vinegar; fermentations GISTBROCADES NV 18 Feb 1977 [20 Feb 1976] 6841/76 Headings C6E and C6F [Also in Division C3] Bacterial continuous fermentation processes, exemplified by the fermentation of ethanol by Acetobacter to produce vinegar, are carried out in a fermentation medium in the presence of a hydrous oxide of titanium, vanadium, zirconium, iron or tin and a chelated polyhydroxy support having the effect of aggregating the bacterial cells. Where the bacterial cells produce extra-cellular cellulose themselves, e.g. strains of Acetobacter xylinus, only the hydrous metal oxide or, alternatively, e.g. titanium-chelated lactose, titanium citrate or titanium urea which hydrolyze at the pH of the fermentation medium, need be added. Otherwise, the hydrous metal oxide is chelated to a polyhydroxy support material before addition to the fermentation medium. The support may be of cellulose, wood, sawdust, water-insoluble or crosslinked polysaccharides, glass and other silaceous materials as powder, beads or fibres. The hydrous titanium oxide may be prepared by hydrolysis of titanium tetrachloride, titanium-chelated lactose, titanium citrate, titanium urea or titanium acrylamide.
|
