METHOD OF CITRIC ACID PRODUCING

FIELD: microbiological industry. SUBSTANCE: invention relates to technology of food organic acids production, namely citric acid, by the submerged fermentation method. Method involves hydrolysis of starch suspension by dilution of the starch suspension containing 26-36 wt.-% of dry matter with an en...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	VORONOVA I.N, NAZARETS E.P, GALKIN A.V, MUSHNIKOVA L.N, NIKIFOROVA T.A, POZDNJAKOVA T.A
Format:	Patent
Sprache:	eng ; rus
Schlagworte:	BEER BIOCHEMISTRY CHEMISTRY COMPOSITIONS THEREOF CULTURE MEDIA ENZYMOLOGY FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIREDCHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERSFROM A RACEMIC MIXTURE METALLURGY MICROBIOLOGY MICROORGANISMS OR ENZYMES MUTATION OR GENETIC ENGINEERING PROPAGATING, PRESERVING OR MAINTAINING MICROORGANISMS SPIRITS VINEGAR WINE
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Beschreibung
Zusammenfassung:	FIELD: microbiological industry. SUBSTANCE: invention relates to technology of food organic acids production, namely citric acid, by the submerged fermentation method. Method involves hydrolysis of starch suspension by dilution of the starch suspension containing 26-36 wt.-% of dry matter with an enzyme preparation of bacterial alpha-amylase (0.5-1.5 U amylolytic activity/1 g of starch dry matter), addition of mineral salts followed by fermentation with Aspergillus niger culture. Before salts addition the starch suspension is kept under an excess pressure 0.1 MPa for 30 min. The purified starch suspension, a semiproduct of starch production (concentration of dry matter is 36%) is used as the initial starch-containing raw. EFFECT: broadened raw base, improved ecology of technology. 1 tbl, 4 ex