MODEL MATEMATIKA KADAR AIR KESEIMBANGAN DUA PARAMETER UNTUK LADA

Agus Supriatna Somantri

Abstract


The Mathematical Model for Two Parameters of Equilibrium Moisture Content for Black Pepper

Equilibrium of Moisture Content (EMC) plays an important role in drying and storage processes. The research was conducted at the Post Harvest Laboratory, Research Institute for Spices and Medicinal Crops, from June 2 to 30, 2001. The research aimed to determine a suitable model of isotherm sorption for pepper commodities, which can be applied on drying and storage processes at the field. The method used was the static method at temperature 40, 45 and 50 oC and range of water activity (Aw) 0.20 – 0.64. The models correlated were the Henderson, Chung-Pfost, Oswin and Halsey, by using numerical method with the BASIC language. The result showed that the two parameters (temperature and relative humidity) of mathematical model had given good result compared with the experimental data. The model of Halsey showed the best accuracy among the other models and it can be used for prediction of the isotherm sorption for black pepper, while the Oswin model for white pepper.

 


Keywords


Isotherm sorption; pepper.

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References


Brooker, D.B., F.W. Bakker-Arkema dan C.W. Gall, 1981. Drying cereal grains. The AVI Pub. Co., Inc. Westport, Connecticut.

Istadi, J.P., Sitompul dan S. Sumardiono, 2000. Perbandingan korelasi dua dan tiga parameter untuk prediksi kandungan air setimbang padi. Prosiding Seminar Nasional Rekayasa Kimia dan Proses 2000, 26-27 Juli 2000. Jurusan Teknik Kimia, Universitas Diponegoro.

Lopez, A., M. T. Pique, J. Boatella, A. Ferra, J. Garcia, dan A. Romero,

Drying characteristics of the hazelnut. Drying Technology, 16 (3-5) : 627 - 649.

Lomauro, G.J. dan A.S. Bakshi, 1985.Finite element analysis of moisture diffusion in store foods. Food Sci.

: 395.

Marinos-Kouris, D. dan Z.B. Maroulis,1995. Transport properties in the drying of solids, dalam Handbook of Industrial Drying, A.S. Mujumdar (ed). Vol. 1. Marcel Dekker, Inc., New York, pp. 113 –

McMinn, W.A.M., dan T.R.A. Magee,1997. Moisture sorption characteristics of starch materials. drying technology. 14(5): 1527 –

Nurdjannah, N., T. Hidayat dan Risfaheri, 2000. Pedoman pengolahan lada putih dengan mesin. Kerjasama Pemda Kabupaten Bangka dengan Balai Penelitian Tanaman Rempah dan Obat (Tidak dipublikasikan).

Papadakis, S.E., R.E. Bahu, K.A.McKenzie, dan I.C. Kemp, 1993. Measurement and prediction of the equilibrium moisture content for drying. The 1993 Research Event, pp. 507 – 509.

Stencl, J., J. Gotthardova, dan P.Homola, 1998. Equilibrium moisture content of dried blood flour in the temperature range of 20

– 50oC. Drying Technology, 16(8):1729 – 1739.

Sitompul, J.P., Istadi dan S.Sumardiono, 2000. Non liniear parameter estimation of EMC correlation for grain-type agricultural products. Proc. Of International Confrence on Fluid- Thermal and Energy Conversion 2000, 2-6 July, Bandung, Indonesia.

Sun, Da-Wen, 1998. Selection of EMC/ERH isotherm equation for shelled corn based on fitting to available data. Drying Technology,

(3 – 5) : 779 - 797.




DOI: http://dx.doi.org/10.21082/bullittro.v14n1.2003.%25p

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