Secagem de urucum em camada fina - caracterização de propriedades de transporte.

Abstract

The annato seeds (Bixa Orellana L.) culture has great economic importance for the producing native of northastern Brazil. The climatic conditions come favorable to the cultivation of this culture, being obtained considerable indexes of bixine (2,7%), standing out as product of great acceptance in the intern and externai markets. Once the bixine is degraded when exposed the light and excessive heat, what happens in the natural dried, intends the convective dried under controllked conditions. The objective of this work is to study some transport properties as apparent thermal diffusivity, mass effective diffusivity and apparent thermal conductivity, with the objective of characterizing the fixed bed dried. Besides it was studied the influence of the temperature and initial humidity in the kinetics dried curves.