Author(s): Alka Singh, Suresh Chandra, Shobhi Chaudhary, Amit Kumar and Shaswat Tiwari

Abstract: Moisture diffusion in Paddy (PS-5) during soaking in water at different temperatures viz., ambient temperature, 40, 50 and 60 0C was studied. The moisture content (dry basis) of paddy (PS-5) was increased 11.358 to 34.084 % (Ambient temperature), 40.984 % (40 ^oC), 43.328 (50 0C) and 51.791 % (60 ^oC) as soaking in water up to 210 min. Model tested for hydration kinetics are Newton/Lewis, Page and Peleg’s equations for soaking of paddy at ambient temperature, 40, 50 and 60 0C for period of 210 minutes in water. The data were used to determine model parameters. The goodness of fit for models were evaluated by highest value of coefficient of determination (R2). The weight of paddy during soaking process was determined in terms of moisture content (dry basis). The resulting kinetic data were correlated by means of different modeling equations. Peleg model predicted adequately the hydration kinetics of paddy (PS-5) under given condition. The Peleg model rate constant K1 and Peleg constant capacity K2 were affected by the increasing soaking time and temperatures. Among the various models, Peleg model was found to be most suitable for describing the hydration behavior of paddy along with increasing temperature and soaking time.

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