Experimental investigation of drying kinetics of pretreated and non-pretreated figs (ficus carica L.)

OpenAlex Türkçe

In this study, drying kinetics of non-pretreated and pretreated Sarılop variety figs (Ficus carica L.) were investigated. In experiments, figs were dried whole (unsliced and unpeeled) at 75°C. Experimental moisture ratio curve was compared with Lewis, Page, Modified Page, Henderson and Pabis, Logarithmic, Weibull distribution, Wang and Singh, Two-term, Two-term exponential and Verma et al drying models. Drying of non-pretreatment figs took 50h and model that best fit to the data of experimental moisture ratio was Verma et al model. Drying of pretreatment figs in the sucrose solution at 50°Brix concentration ratio and 50°C temperature under vacuum with osmotic dehydration (130mbar (15min) + atmospheric pressure (165min)) took 28h and it was found that the model best fit to the data of experimental moisture ratio was Weibull distribution model. Drying of pretreatment figs in the sucrose solution at 30°Brix concentration ratio and 50°C temperature under vacuum with osmotic dehydration (130mbar (15min) + atmospheric pressure (165min)) took 38h and it was determined that the model best fit to the data of experimental moisture ratio is Weibull distribution model. Drying of pretreatment figs in the sucrose solution at 50°Brix concentration ratio and 30°C temperature under vacuum with osmotic dehydration (130mbar (15min) + atmospheric pressure (165min)) took 34h and it was seen that the model best fit to the data of experimental moisture ratio was Weibull distribution model. Drying of pretreatment figs in the sucrose solution at 50°Brix concentration ratio and 50°C temperature under atmospheric pressure with osmotic dehydration (180 min) took 46h and it was found that the model best fit to the data of experimental moisture ratio was Wang and Singh model. Results show that osmotic dehydration shortened the drying period. Furthermore, variables in the osmotic dehydration such as concentration ratio of solution, solution temperature and vacuum affected the drying period.