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Drying characteristics of ground and fermented cassava mash called "gari" (a carbohydrate and staple food in Nigeria) were studied. Several properties such as drying rate, thermal conductivity, thermal diffusivity, specific heat capacity, and bulk density were investigated during the roasting of the mash. These properties were discovered to be influenced by the removal of moisture as the mash dries. The optimum initial moisture content was 46 % wb at 60 % Rh. The roasting chamber reaches a steady state temperature of 160 oC in 12 minutes before roasting while 5 kg of the wet cassava mash dried to a final moisture content of 9.8 % wb in 21 minutes. It was observed that as the moisture content reduces from 46 % to 9.8 %, the bulk density increased from 441.32 kg/m3 to 507.91 kg/m3, drying rate reduces from 2.64 to 0.54 kg/min and specific heat capacity reduces from 4.14 to 2.01 kJ/(kgK). The effects of the moisture removal on the studied parameters were thus discussed as the mash dries along the length of the dryer.
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Akeredolu, F.A., Oshinowo, T. and Mezu, C.O. 2003: Transfer Coefficients and Moisture Diffusivity for the Drying of Manihot Utilissima (Cassava). Nigeria Drying Symposium Series I, pp 53-64.
ASAE, 1990: American Society of Agricultural Engineers (ASAE) Standards: Standard Engineering practices and data: (Ed. Hahn, R.H. and Rosenteter, E.G.) 37th Edition, St. Joseph, MI 49085. Pg.354-356.
Babalola, O.O. 2014. Cyanide Content of Commercial Gari from Different Areas of Ekiti State, Nigeria, World Journal of Nutrition and Health 2(4): 58-60.
Cooke, R.D. 1978. An Enzymatic Assay for the total cyanide content of Cassava (Manihot Esculenta Crutz). Journal of the Science of Food and Agriculture 29:345-352.
Etsuyankpa, M.B., Gimba, C.E., Agbaji, E.B., Omoniyi, I., Ndamitso, M.M. and Mathew, J.T. 2015. Assessment of the Effects of Microbial Fermentation on Selected Anti-Nutrients in the Products of Four Local Cassava Varieties from Niger State, Nigeria, American Journal of Food Science and Technology. 3(3):89-96.
Faborode, M.O., Gbadegesin, A.B., Olotu, O.M. and Eboreime, O.K. 1992: Steeping and drying characteristics of maize and cassava and their products. Nig. Food Journal 10:51-60.
Hall, C.W. 1980: Drying Farm Crops, Lyall book depot, Ludiona, India.
Jackson, A.T. and Lamb, J. 1981: Calculations in Food and Chemical Engineering. Macmillan Press Ltd., London. pp 88.
Kreith, F. and Bohn, S. M. 1986: Principle of Heat Transfer, Harper and Row Publishers, N.Y. 700pp.
Mujumdar, A.S. 2000: Dryers for production of Particulates Solids. In: Practical Guides to Industrial Drying, Ed. By Sakamon Devahastin. Pp. 63-73.
Nweke, F.I., Spencer, D.S.C. and Lynam, J.K. 2002. The cassava transformation: Africa's best kept secret, Michigan State University Press, Lansing, Mich, USA, 2002.
Obadina, A.O., Oyewole, O.B. and Ayoola, A.A. 2008. Quality Assessment of Gari produced Using Rotary Dryer. In: Food Processing: Methods, Techniques and Trends. Edited by Valerie Bellinghouse. Nova Science Publishers Inc. pp 1-7.
Ogunlowo, A.S. and Oyerinde, A.S. 2000: Experimental Investigation and Computer modelling of heat and mass transfer of cassava mash during drying, Journal of Applied Science Vol. 3 (4) 1327-1337.
Oluwafemi, G.I. and Udeh, C.C. 2016. Effect of fermentation periods on the physicochemical and sensory properties of gari, Journal of Environmental Science, 10(1): 37-42.
Onwuka, N.D.K. 2003: Essential Elements of Food and Related Processes Engineering. Academic Publishers, Nsukka, Pp. 538-571.
Osoka, E.C. and Okpala, K.O. 2006: A Theoretical Model for the Drying Kinetics of Fermented Cassava Mash. Nigerian Drying Symposium Series 2:105-109.
Owuamanam, C.I., Hart, A.D. and Barimalaa, I.S., Barber, I.L. and Achinewhu, S.C. 2010: Nutritional Evaluation of "gari" Diets from Varying Fermentation Time Using Animal Model. Researcher 2(8): 1-10.
Oyerinde, A.S. 1998: Experimental Investigation and Computer modelling of heat and mass transfer of Cassava mash during drying. An unpublished M. Engr. Thesis, Agric. Engineering Dept. Fed. University of Technology, Akure, Nigeria, 105pp.
Scala, K.D. and Crapiste, G. 2008: Drying Kinetics and Quality Changes during drying of Red Pepper. Swiss Journal of Food Science and Technology, 41:789-795.
Shukla, B.D., Ojha, T.P. and Gupta, C, P. 1985: Measurement of properties of husk boards, part II Thermal properties. AMA Vol. 16(2) 53-60.
Singh, R.P. and Heldman, D.R. 1993: Introduction to Food Engineering. Food Science and Technology International Series. Academic Press Ltd. London. Pp. 11-18.
Sobowale, S.S., Awonorin, S.O., Shittu, T.A., Oke, M.O. and Adebo, O.A. 2016. Estimation of material losses and the effects of cassava at different maturity stages on garification index. Journal of Food Processing and Technology 7(2): 1-5.
Vasconcelos, A.T., Twiddy, D.R., Wesby, A. and Reilly, P.J.A. 1990. Detoxification of Cassava during â€œgariâ€ Preparation. International Journal of Food Science and Technology25:198-203.
Wesby, A. 2002. Cassava Utilization, Storage and Processing. In Cassava: Biology, Production and Utilization. (Eds R.J. Hillocks, J.M. Thresh and A.C. Bellotti). CAB International Chapter 14:281-300.
Williams, C.E. 1979: The role of women in cassava processing in Nigeria. In small scale processing and storage of Tropical root crops. Ed. Plucknett, D.C. Westview Press, Colorado. Pp 340-350.