Corn Drying with Zeolite in The Fluidized Bed Dryer under Medium Temperature

Mohamad Djaeni, Nurul Aishah Aishah, Harum Nissaulfasha, Luqman Buchori

Abstract


Drying is an important step to find high quality of corn. Based on Standard of National Industry, populer as SNI, number 01-3920-1995, the corn was well stored at moisture content 14% or below (wet basis). However, conventional corn drying dealed with in-efficient energy process and corn quality degradation. This research evaluated the performance of corn drying assisted by zeolite as moisture adsorbent. In this process, the zeolite and corn were placed in the dryer fluidized by warm air as drying medium under 40 - 50oC. The air evaporated water product from corn, and at same time the zeolite adsorbed moisture in air. So, the relative humidity of air in dryer can be kept low in which enhanced the driving force for drying. Beside that, the moisture adsoprtion by zeolite was exothermic process that can supply the energy for drying or keep the dryer temperature. Thus, the drying rate can be faster. This work foccussed to observe the effect of drying temperature, air velocity, and corn to zeolite ratio on drying time as well as corn quality. As indicators, the drying rate was estimated and the proxymates content such as protein, fat, and carbohydrate content were analyzed. The results showed that compared with conventional fluidised bed dryer, corn drying with zeolite, can speed up drying time as well as improving the constant of drying rate. In addition, the corn proximate nutrition content can be well retained. At operating temperature 40oC, air velocity 9 m.s-1, and zeolite to corn ratio 1:2, the drying time can be 60 minutes shorter compared to that without zeolite.

Keywords


Corn; Zeolite; Fluidized Bed Dryer; Drying Rate

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References


G.W. Dickerson, :Nutritional Analysys of New Mexico Blue Corn and Dent Corn Kernels”, College of Agriculture and Home Economics Guide H-233 pp. 1-2, 2003.

A. Wongurai, 0. Tsuruta, and K. Arai, “Water Activity of Thai Maize and Growth of Aspergillus Flavus”. Research Report of Maize Quality Improvement Research Centre Project. pp. 7 – 9, 1992.

T. Kudra, and A.S. Mujumdar. “Advanced Drying Technology”. Marcel Dekker Inc., New York, USA, 2002.

S. Soponronnarit, A. Pongtornkulpanich, and S. Prachayawarakorn. “Drying Characteristics of Corn In Fluidized Bed Dryer”. Drying Technology. Vol. 15 no. 5, pp. 1603-1615, 1997.

A.G. Meiering, T.B. Daynard, L. Brown, and L. Ottern, “Dryer Performance and Energy Use in Corn Drying”. Canadian Agriculture Engineering, Vol. 19 No. 1, pp. 49 – 54, 1977.

G.S. Mittal, and L.Ottern, “Simulation of Low Temperature Corn Drying”. Canadian Agriculture Engineering, Vol. 24 No. 2, pp. 111 – 118, 1982.

W.Jittanit, G. Srzednicki, and R. Driscoll, “Corn, Rice, And Wheat Seed Drying by Two-Stage Concept”. Drying Technology,Vol. 28 No. 6, 807-815.

B.E. Lynch and R.V. Morey, “Control Strategies for Ambient Air Corn Drying”. Transaction of the American Society of Agricultural Engineers, 32(5), 75-79, 1989.

G.O. Revilla, T.G. Velázquez; S.L. Cortés.; S.A. Cárdenas, Immersion drying of wheat using Al-PILC, zeolite, clay, and sand as particulate media. Drying Technology, Vol. 24 No. 8, pp. 1033-1038, 2006.

M. Djaeni, Hargono, and L. Buchori, The Effect of Zeolite On Drying Rate Of Corn In Mixed-Adsorption Dryer. 7th Asia-Pacific Drying Conference (ADC 2011) Tianjin, China, September 26th-28th, 2011.

M. Djaeni, L. Kurniasari, A. Purbasari, and S.B. Sasongko, “Activation of Natural Zeolite as Water Adsorbent for Mixed-Adsorption Drying”. Proceeding of International Conference on Material Engineering, Gadjah Mada University, Yogyakarta Indonesia, November 26th – 27th, 2010.

H. Nissaulfasha, M. Djaeni, and L. Buchori, “Mixed Adsorption Dryer In Fluidized Bed For Corn Drying : The Effect of Temperature And Superficial Air Velocity To Moisture Content of Corn”. Proceeding International Student Conference: The Power of Local Knowledge in Increasing Food Business Competitivenes. 1, pp. 114-118, 2012.

S.V. Jangam, and A.S. Mujumdar, “Basic Concepts and Definitions”. Drying of Foods, Vegetables and Fruits. Ed. Jangam, S.V., Law, C.L. and Mujumdar, A.S. ISBN - 978-981-08-6759-1. Singapore. 1: pp.1-30, 2010.

N. Boudhrioua, C. Bonazzi, and J.D. Daudin, “Estimation Of Moisture Diffusivity In Gelatin–Starch Gels Using Time-Dependent Concentration–Distance Curves At Constant Temperature”. Food Chemistry , Vol. 82 No. 1, pp.139-149, 2003.

T.K. Nguyen, “Convective Mass Transfer”. Mass Transfer. California State Polytechnic University, Pomona. USA, 2011.

P.S. Takhar, “Hybrid Mixture Theory Based Moisture Transport And Stress Development In Corn Kernels During Drying: Coupled Fluid Transport And Stress Equations”. Journal of Food Engineering. 105 , pp. 663-670, 2011.

D. Marinos-Kouris, and Z.B. Maroulis, Transport Properties in The Drying of Solids. Handbook of Industrial Drying. Taylor & Francis Group, LLC, 2006.

M.C. Falabella, C. Suarez, and P.E. Viollaz, “Drying Kinetics of Corn in Contact with a Solid Adsorbent”. Journal of Food Engineering. 13, pp. 273-283, 1991.

C.W. Hall, Drying and storage of agricultural corps. West port, CT:AVI, 1980.

P. Malumba, C. Vanderghem, C. Deroanne, and F. Bera, Influence of drying temperature on the solubility, the purity, of isolates and electrophoretic patterns of corn protein. Food Chemistry. 111, pp.564-572, 2008.




DOI: http://dx.doi.org/10.12962/j20882033.v24i2.182

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