S. Lue et al., MODELING OF TWIN-SCREW EXTRUSION-COOKING OF CORN MEAL AND SUGAR-BEET FIBER MIXTURES, Journal of food engineering, 21(3), 1994, pp. 263-289
A statistical model was established for extrusion cooking of com meal
and sugar beet fiber mixtures in a twin-extruder. The operational vari
ables included screw speed of the extruder, addition level of sugar be
et fiber and fiber particle size. Specific mechanical energy (SME) inp
ut, product temperature (I), pressure before die (DP) and gelatinized
starch content (GS) were measured and used to characterize the physica
l and chemical properties of extrudates. The results showed that these
predictor variables could explain 79-96% of the variations in product
length, diameter, specific volume, breaking strength and water absorp
tion index. Color attributes of the product also depended on the fiber
particle size. It showed that the empirical model proposed by Meuser
and coworkers is applicable to the complex food system.