DRYING BEHAVIOR OF PEANUTS USING A ROTARY DRYER

Document Type : Original Article

Authors

1 Prof. of Ag. Eng., Fac. of Ag. Eng., Al-Azhar Univ., Cairo. Egypt.

2 Deputy Director, Ag. Eng. Res. Inst., Ag. Res. Center, Dokki, Giza, Egypt.

3 PhD Student, Fac. of Ag. Eng., Al-Azhar Univ., Cairo. Egypt.

Abstract

A study was carried out to test and evaluatehigh-temperature short-time drying behavior of peanuts pods using a laboratory scale rotary dryer. The experimental work was conducted at six different levels of cylinder surface temperature 55, 65, 75, 85, 95 and 105 oC, three levels of cylinder rotational speed 3, 6 and 9 (r.p.m) and three peanut batch masses 1, 1.5 and 2 (kg/batch). The high temperature rotary drier was evaluated in terms of operating factors likewise moisture regiem, drying temperature, pods and kernels temperatures, batch mass feed, cylinder rotational speed and compatibility of experimental data to Lewis models. The optimal treatment of the high temperatur dried pods of peanuts was slected in terms of physical characteristics of microbiological quality parameters, percentages of broken, splitted, shriveled kernels, oil content of peanuts, free fatty acids and peroxide value of peanuts oil. The results show that, heating surface temperature of 65 oC, cylinder rotational speed of 6 r.p.m and pods batch mass of 1.5 kg recorded the lowest values of kernels splitting, broken and shriveling percentages. The mathematical analysis showed that, Lewis model could satisfactorily describe the drying behavior of high moisture peanuts pods.

References

Abd El-Reheem, S. S. (2013). Effect of drying methods and storage environment on the quality of sunflower seeds and oil. unpublished P.hD Thesis. Dept. of Agric.Eng. Fac. of Agric MansouraUniv.
Asae (2003) The society for Engineering in Agricultural, food, and biological systems 2950 Niles Rd., ST. Joseph, MI 49085-9659, USA ph. S410.1 FEB03.
Athapol, N.; K. Premakumar & H. T. Sabarez (1994). Design and Development of a conduction Drier for Accelerated Drying of Peanuts. J.of Food Engineering 21 411-419.   
Charjan, S.K.U and J.L. tarar. (1992). " Influence of storage container on germinability and mycoflora of sunflower seed ( Helianthus annuus L.) seeds and farms. 1992; 18(4-6): 3-5. India.
El-Kholy, M.M, (1998). Conditioning and aeration of high moisture paddy under different storage conditions. Unpublished, Department of Agric. Eng. Fac. of Agric., MansouraUniv.
Flannigan, B. (1977). Enumeration of fungi and assay for ability to degrade structural and components of grain. In Biodeterioration investigation techniques (ed. H. Walters) London, Applied Science Publishers, pp. 185-199.
Lewis, W. K. (1921). The rate of drying of solid materials j. of Ind. Eng.Chem. 13(5): 427-432.
Mohamed A.M.S (2014). Effect of high temperature short – time drying systems on rice milling quality. Un-published M.Sc Thesis Depe. Of Agric. Eng. Fac. Of Agric. Mansoura Univ.
Sacilic, K. and G. Unal (2005). Dehydration Characteristics of Kastamonu Garlic Slices. Bio Systems Engineering, 92: (2), 207–215.
Oil seed Situation & oullok, 2002
تقریر صادر عن قطاع الشئون الاقتصادیة بوزارة الزراعة واستصلاح الاراضی 2002 عن موقف البذور الزیتیة  ومستقبلها
Wyne, J.C.(1982). Variation in milling quality of peanuts. Peanuts. Peanuts Science, 9: 30-33.
Yaldiz. O.; C. Ertekin and H. L. Uum (2001). Mathematical modelling of thin laver solar drying of Sultana grapes. Energy, 26: 457 – 465.

Files

Share

How to cite

Statistics