The Study On The Epidermal Wax And Drying Process Of Lycium

Lycium has high moisture content and has waxy layer on the epidermis, which keep its drying time long and easy to mildew. So according to its physiological characteristics, the development of dry-promoting agent for the corresponding system of dry process is very important. GC-MS (gas chromatography-mass) was used on analyzing wax components of Lycium epidermal, and quantitatively identified the main component of the cuticle layer is long chain aliphatic hydrocarbon which provided scientific data for the screening and research on dried of Lycium fruit. A method of electron microscopy to research on the cuticle layer revealed the microstructure of the cuticle layer of Lycium, that epidermal wax were striped to cover the epidermis. It was used to compare the difference of epidermal wax structure of Lycium between the Lycium fruit without treatment of drying promoter and the Lycuim with different treatment of drying promoter, by which explained the mechanism of Lycium drying promoter. With hot air drying in laboratory, through comparing the drying curves and drying rate curves of water loss, Filter the best ratio of drying promoter:vegetable oil 10%, NaOH 1%, ethanol 4%, Na2CO3 65%,and the best dilution ratio:the dried:Water=1g:100ml.Taking Lycium fruit treated after drying promoter as the object of study, under basic condition of constant humidity, different temperature hot air system was used to Lycium drying test, and got the drying curves and drying rate curves of water loss and obtained the characteristics of Lycium fruit drying. Variable temperature system was used to dry Lycium, and by analyzing and comparing,Lycium drying process plan treated by 1st drying promoter under the temperature of 20～28℃and Relative Humidity 46～56% of the atmospheric environmental conditions was obtained. As a comparative study of Laboratory production of fresh Lycium drying technology, we commissioned the German company Hans. Pentax drying Experimental Centre to dry Lycium fruit with its high moisture, high sugar berries rapid process and conduct the laboratory equipment. In consecutive sunny and overcast days, the solar and natural drying test on the Lycium fruit treated by 1st drying promoter and 1st antifungal agent provided the basis for the solar energy hot house system. According to the latest national and industry standards for Lycium, we improved the experience formula of drying promoter.The ratio (mass ratio) is Vegetable oil:ethanol:NaOH:Na2CO3:Na2S2O5/10: 4:1:65:1.8.We did study on the dry process of industrial scale solar energy hot house, in which we used the reverse air pressure technology making the shed temperature and humidity balance, significantly improving the consistency of dried samples,and beneficial to reduce the rate of mold.