EQUILIBRIUM MOISTURE CONTENT FOR TWO PEANUT VARIETIES

Ghanem, T.H.; Shetawy, M. El-Said; Desoky, S.H. Mohamed

doi:10.21608/mjae.2009.109493

EQUILIBRIUM MOISTURE CONTENT FOR TWO PEANUT VARIETIES

Document Type : Original Article

Authors

¹ Associate Prof. , Agric. Eng. Dept. Faculty of Agric., Al-Azhar Univ., Egypt.

² Lect. Agric. Eng. Dept. Faculty of Agric., Al-Azhar Univ., Egypt.

10.21608/mjae.2009.109493

Abstract

Adsorption and desorption isotherms for two different varieties of peanuts, namely: Ismailia1 “Is1” and Giza5 “G5” were evaluated using the dynamic method of equilibrium moisture content “EMC”. Three different temperatures of the circulated air “T”: 30, 36 and 43 ^oC; four different levels of relative humidity “RH” namely: 2.5, 32, 46 and 87% were studied. Non-linear regression analysis was made for evaluating the compatibility of the experimental data to Henderson’s model.
Multiple regression analysis was also used to sensitize a generalized model and for determining the effect of peanut variety, adjacent air temperature and relative humidity on the EMC of peanut for both adsorption and desorption tests for the previously defined range of both T and RH. The main objective of the present study is to evaluate the best fit model for the equilibrium moisture content to be available in analytical study for drying, storage and practical design of drying systems of peanut.

Main Subjects

Agricultural Irrigation and Drainage Engineering

References

ASAE 1994.Moisture measurement-peanut .Agric. Eng. Yearbook 5410Dec92St. Joseph Michigan, :477-478.

Chen C. and R.V. morey 1989. Comparison of four EMC/RH Equations. Trans. Of theASAE.32(3):983-990.

Chen C. 2000. A rapid method to determine the sorption isotherms of peanut. J. Agric. Eng. Res. (75) :401-408.

FAO2008.Cultivated area of agric. crops. www. org./docrep/v9998e/ v9998 Oe.htm. at 12/10/2008.

Ghanem T.H. 1998. Solar energy utilization, specifically on drying or sterilization of animal manure under Egyptian conditions for use as protein supplement in animal feed.Ph.D. Thesis Fac. of Agric. Eng. Dept. Al-Azhar U.: 95-99.

Ghanem T.H. and I..S. El-Soaly 1999.Desorptoin equilibrium moisture content relationship for okra as affected by ambient air temperature and relative humidity. The 7^th conf.Misr Soc. of Agric.Eng.,27-28 Oct.: 50-59.

Hall,C.W. 1980.Drying and storage of agricultural crops. The AVI Pub. Inc. WestportConn. U.S.A:921-308.

Hummeida M.A. and M.A.Ismail1989.Determination of equilibrium moisture content for two varieties of peanut. Agric. Mech. Asia and Latin America. 20(3): 53-58.

Tgwa A., Murata S. and Hayashi, 1993. Latent heat of vaporization in buckwheat using the data of equilibrium moisture content. Trans. ASAE 36(10:113-114.