Kinetics of Granular Starch Hydrolysis in Corn Dry-Grind Process

A promising modification to the dry grind process is the use of granular starch hydrolyzing enzymes (GSHE) for corn fractionation and ethanol production. Modeling the kinetics of granular starch hydrolysis in the corn dry-grind process is challenging given the heterogeneity of the substrate and the...

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Veröffentlicht in:	Die Stärke 2009-08, Vol.61 (8), p.448-456
Hauptverfasser:	Vidal, Bernardo C. Jr, Rausch, Kent D, Tumbleson, Mike E, Singh, Vijay
Format:	Artikel
Sprache:	eng
Schlagworte:	Amylase kinetics Biological and medical sciences Cereal and baking product industries Dry-grind corn process Food industries Fundamental and applied biological sciences. Psychology Granular starch hydrolysis Raw starch hydrolysis Starch and starchy product industries Starch degrading enzymes
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Beschreibung
Zusammenfassung:	A promising modification to the dry grind process is the use of granular starch hydrolyzing enzymes (GSHE) for corn fractionation and ethanol production. Modeling the kinetics of granular starch hydrolysis in the corn dry-grind process is challenging given the heterogeneity of the substrate and the combined activities of α-amylase and glucoamylase. By measuring reducing sugars, the hydrolysis progress in dry-grind corn slurry treated with a commercial GSHE was monitored during 3 h of reaction. Progress curves consisted initially of a rapid product formation phase (
ISSN:	0038-9056 1521-379X
DOI:	10.1002/star.200800091