Comparación entre el secado convectivo y osmoconvectivo en la pérdida de vitamina C de Aguaymanto (Physalis peruviana) con y sin pre-tratamiento de NaOH.

Abstract

In this work, loss of vitamin C in the drying of golden berry was evaluated, the samples were separated into two groups one was immersed in a 1.5% solution of NaOH per 5 seconds at 80 ° C and the other group in water under the same conditions, then each group was divided into two subgroups, one of the which was subsequently subjected to convective drying (60 ° C and 3 m / s) and the other plus a convective drying under the same conditions had an osmotic dehydration prior to vacuum (40 ° C, 65 ° Brix, 540 mmHg 4 hours), and was used as process parameter of stop 20% product moisture, controlled evaluating the evolution of weight loss. To the dehydrated cape aguaymanto, was determined the content of vitamin C and humid. It was determined that osmotic dehydration and after convective drying losses are greatest vitamin C than only convective drying and NaOH pretreatment facilitating positively influences mass transfer in drying processes also generate lower losses of vitamin. Golden Berry is recommended to produce dehydrated with the least loss of vitamin C, convectively dried at 60 ° C and 3 m / s by a pretreatment of 1.5% NaOH for 5 seconds at 80 ° C

Keywords

• acid ascorbic
• convective drying
• Aguaymanto
• Acido Ascórbico
• secado
• secado osmoconvectivo
• secado convectivo
• NaOH