Samples of
Solanum tuberosum var. Primura were submitted to combined treatments of blanching and dehydration. Blanching was alternatively performed in hot distilled water, hot sugary-saline solution, ...by microwaves in distilled water or by microwaves in saline solution. Drying was alternatively carried out in an air cabinet, a microwave oven or a belt drier. In terms of process speed, colour retention and water absorption capacity, the best results were obtained combining microwave blanching with dehydration on the belt drier. In particular, dehydration on the belt drier levelled eventual negative effects determined by the blanching treatments.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UL, UM, UPCLJ, UPUK
This paper a method for dehydrating heat-sensitive materials in the co-current belt dryer , which includes changes in temperature and moisture content of the drying agent and allowing to reduce the ...drying time and to ensure energy and resource conservation is presenting. The mathematical model and a numerical method for calculating the dynamics of heat and mass transfer, phase transformations and shrinkage during drying of colloidal capillary-porous bodies in a co-current belt dryer are presented.
A nonlinear programming (NLP) approach to short- and long-term production planning for a multiproduct dehydration plant involving continuous conveyor belt dryers, utilized for the dehydration of ...agricultural products over a finite time horizon, is presented in this paper. Limitations imposed by storage capacity and customer orders, as well as constraints dictated by supply and demand patterns of raw materials and final products, respectively, are considered. The two problems dealt with are expressed in NLP formulations, which include in their objective function an operational cost component, inferred by deducing the mathematical model for all units participating in the plant. Characteristic examples are presented to demonstrate the effectiveness of the proposed approach.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UILJ, UL, UM, UPCLJ, UPUK, ZAGLJ, ZRSKP
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