SOLAR DRYING OF PEANUT PODS USING TWO DIFFERENT TYPES OF SOLAR DRYERS | ||||
| Journal of Soil Sciences and Agricultural Engineering | ||||
| Article 1, Volume 31, Issue 12, December 2006, Page 7709-7728 PDF (256.81 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jssae.2006.225035 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| A.S. El-Sayed; S.K. El-Samahy; S.M. Radwan; A. Abo ElSoud | ||||
| Fac. of Agric., Suez Canal University. | ||||
| Abstract | ||||
| The objective of the present study was to investigate and evaluate two different drying methods of peanut (forced convection solar drying and natural convection solar drying) under three different layer thicknesses of (5, 10 and 15 cm) and two different stirring conditions (with stirring and without stirring). The studied drying methods were compared with sun drying method practiced by farmers. For the tradltonal drying method, the average peanut pods moisture content at different layer thicknesses of 5, 10 and 15 cm was decreased from an initial level of 54.39% (w.b.) to a final level of about 13±1% (w.b.) in 52, 56 and 66 h, respectively. Meanwhile, for the natural convection solar dryer, the recorded drying time for the unstirred peanut pods with different layer thicknesses were 48, 56 and 62 h, and the corresponding drying time for the stirred treatments were 44, 50 and 54 h, respectively. Under condition of forced convection greenhouse type solar dryer, the recorded drying times for the unstirred treatments at different layer thickness were 40, 48 and 56 h, and the corresponding drying times for the stirred treatments were 36,40 and 46 h, respectively. The thermal efficiency of the forced convection solar dryer was (46%) while it was 23.93% for the natural convection solar dryer. The quality evaftiation tests showed that) the acid value decreased from 0.74 to 0.4 and the peroxide value decreased from 3 to 1.33. These va’ues are in the range of the quality standards for peanut. | ||||
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