Cinética de secagem de raspas da entrecasca do Juazeiro (ZIZIPHUS JUAZEIRO) em camada de espuma (FOAM-MAT DRYING)

Abstract

Juazeiro is a plant of the family of the Rhamnaceae, which scientific name is ZIZIPHUS JOAZEIRO, also known like joá, joazeiro, juazeiro, among others. It is a tall tree, which reaches from 5m to 15m in height, abundant, thorny. With coriaceous leaves, small flowers and globose fruit. Juazeiro's bark scrapes have several applications, the main one is to replace the soap in places where the water is heavy, brackish, because it has saponáceas properties. Tea and syrup made from zest and leaves can be used for medicinal purposes. Recently, various hygiene and cosmetic products industrialized have included juazeiro in the composition of its products. In a simple manner, drying is a process in which heat is supplied to a particular material for the purpose of unleashing or evaporating the moisture content that exists on the breast or on the surface of the material, thereby obtaining a moisture-free product, i.e. , dried. Foam-mat drying applies to the drying of liquid or semi-liquid foodstuffs, which are converted into a stable foam by the incorporation of air into their structure and the addition of emulsifying/stabilizing/foamy agents when necessary, and has the characteristic of adding high commercial value and quality to the products, offering great possibilities of commercialization and uses. This work has the objective of studying the kinetics of foam-mat drying of the juazeiro to obtain its powder. In the present work the characterization of the foam obtained was made through: density, air incorporation and stability, as well as an analysis of the drying kinetics of the same was performed. The kinetics were performed based on a factorial planning 2 3 + 3 central points, where the input variables analyzed were: agitation time, bark concentration and drying temperature. The drying was done in an air circulating drying oven. It was verified the influence of the variables and it was contacted that the drying temperature is the variable that most influences the drying time of the juazeiro's barks. The use of this method for the drying of the juazeiro's barks showed good results.