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US 11,076,616 B2Granted
L-amino acid-containing feedstuff additive
AssigneeEvonik Operations GmbH
InventorsAnsgar Oelmann, Hans Christian Alt, Franz Ulrich Becker, Wilfried Blümke, Wilfried Claes
Life of this patent
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Abstract
By substituting biomass with a surface-active substance in a fermentation broth containing amino acid before spray-drying, granulated animal feed additives with improved product specifications were obtained.
Claims20
A method for preparing a feed additive, comprising the following steps:
- a) obtaining a low biomass content fermentation broth by:
- i) fermenting an L-amino acid-producing microorganism in an aqueous culture medium to produce a fermentation broth;
- ii) after the fermenting of step i) is complete:
- aa) removing biomass from the fermentation broth to reduce the biomass content to, at most, 4% by weight;
- bb) adding surface-active substance to the fermentation broth to a final concentration of 0.025 to 20% by weight;
- and
- b) drying the low biomass content fermentation broth obtained in step a) in order to convert it into said feed additive;
- wherein the concentrations of biomass and surface-active substance in the low biomass content fermentation broth are such that the feed additive of step b) is a particulate composition with a particle density of at least 1.20 g/cm3.
5 more elements
A method for preparing a feed additive, comprising the following steps:
- a) fermenting an L-amino acid acid-producing microorganism in an aqueous culture medium to produce a fermentation broth;
- b) after the fermenting of step a) is complete, converting the fermentation broth into a low biomass content fermentation broth by:
- i) removing biomass from the fermentation broth to reduce the biomass content to, at most, 4% by weight, wherein at least 50% by weight of the biomass is removed from the fermentation broth before drying;
- ii) adding a surface-active substance to the fermentation broth, wherein said surface-active substance is added to a final concentration of 0.025 to 20% by weight;
- and
- c) drying the low biomass content fermentation broth obtained in step b) to convert it into a said feed additive;
- wherein the concentrations of biomass and surface-active substance in the low biomass content fermentation broth are such that the feed additive of step c) is a particulate composition with a particle density of 1.20-1.30 g/cm3.
4 more elements
Dependencies are inferred from the claim text.