Particles containing coated living micro-organisms, and method for producing same
AssigneeLallemand SAS
InventorsHenri Durand, Jerome Panes
Life of this patent
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Abstract
Particles containing dehydrated living micro-organisms are coated with a homogeneous layer of hydrophobic substance selected to reduce the risks of degradation of the micro-organisms by physico-chemical stresses such as heat, humidity, gastric acid, or compression. A method for producing such particles includes injecting a melting hydrophobic substance into the mass of the dehydrated micro-organisms placed in a chamber swept by an air stream at controlled temperature, where the base is rotating.
Claims20
A method of coating dehydrated living microorganisms characterised in that a molten hydrophobic substance having a melting point higher than 60° C. is injected at a temperature of at least 5° C. higher than the melting temperature of said hydrophobic substance, said injection temperature being between 65° C. and 120° C., into a chamber containing said microorganisms which are agitated by rotation of the base of said chamber and swept by a flow of air at a temperature of between 10° C. and 50° C., said airflow having a sweeping speed so that the temperature in the chamber does not exceed by more than 5° C. the viability temperature of said microorganisms, and wherein particles made of a cluster of dehydrated living microorganisms and a homogenous hydrophobic coating layer are obtained.
A method of coating dehydrated living microorganisms, comprising:
- introducing said microorganisms into a chamber having a base;
- agitating said microorganisms by rotation of the base of said chamber;
- providing a flow of air at a temperature of between 10° C. and 50° C., said airflow having a sweeping speed so that the temperature in the chamber does not reach a temperature of more than 5° C. of the viability temperature of said microorganisms;
- and thereafter
- injecting a molten hydrophobic substance having a melting point higher than 60° C. into said chamber containing said microorganisms at a temperature of at least 5° C. higher than the melting temperature of said hydrophobic substance, said injection temperature being between 65° C. and 120° C.,
- and wherein particles comprising dehydrated living microorganisms having a homogenous hydrophobic coating layer covering said microorganisms are obtained.
A method of coating dehydrated living microorganisms, comprising:
- introducing a cluster of cells comprising said microorganisms into a chamber having a base;
- agitating said cluster of cells comprising said microorganisms by rotation of the base of said chamber;
- providing a flow of air at a temperature of between 10 and 50° C. into said chamber, said airflow having a sweeping speed so that the temperature in the chamber does not exceed by more than 5° C. of the viability temperature of said microorganisms;
- and thereafter
- providing a molten hydrophobic substance having a melting point higher than 60° C. into said chamber containing said cluster of cells comprising said microorganisms at a temperature of at least 5° C. higher than the melting temperature of said hydrophobic substance to obtain particles comprising said cluster of cells comprising said microorganisms and a homogenous hydrophobic coating layer.
Dependencies are inferred from the claim text.