Method and reactor vessel for the fermentative preparation of polysaccharides, in particular xanthane

Abstract From the Canadian patent

For the fermentative preparation of polysaccharides, in particular xanthane, water production medium, (sugars, nutrient salts) and an inoculation material of a, suitable aerobic bacterium are mixed in a reactor as reaction components, the production medium being exposed to fermentation while an oxygen-containing gas is being supplied. The object is to avoid the usual low yield of such a process and to reject an expensive and sensitive alternative construction (circulation tube). According to the invention, the reaction components are introduced into a reactor vessel in a circulating flow by means of Pumping means, which circulating flow comprises a rising flow and a descending flow which …