EFFECT OF INTERMITTENT DRYING CONDITIONS ON FISSURING PERCENTAGE AND PROCESS DURATION OF LONG AND MEDIUM ROUGH RICE VARIETIES

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GHASEMI A.; SADEGHI M.; MIREEI S.A.

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Journal: JOURNAL OF CROP PRODUCTION AND PROCESSING Year:2016 | Volume:5 | Issue:18 Page(s): 51-62

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Title

EFFECT OF INTERMITTENT DRYING CONDITIONS ON FISSURING PERCENTAGE AND PROCESS DURATION OF LONG AND MEDIUM ROUGH RICE VARIETIES

Author(s)

GHASEMI A. | SADEGHI M. | MIREEI S.A. | Issue Writer Certificate

Keywords

FISSURINGQ1

INTERMITTENT DRYINGQ3

MOISTURE GRADIENTSQ2

ROUGH RICEQ2

TEMPERINGQ2

Abstract

One of the factors which affect the quality of rice during milling is internal fissures created during and after drying operation. In many industrial countries INTERMITTENT DRYING method is hired to reduce the moisture content of ROUGH RICE in order to reduce the drying time and maintain the quality of the final product. A high percentage of rice breakage during milling process, at least in Iran, necessitates performing the INTERMITTENT DRYING process and optimize it for Iranian varieties. In this study, the effect of this method (drying-tempering) and continuous drying method (no TEMPERING) on FISSURING percentage of Hashemi (long grain) and Koohsar (medium grain) varieties was investigated. The experiments were carried out at constant drying and TEMPERING temperature of 60oC, drying durations of 20, 40 and 60 min, and TEMPERING durations of 0 (continuous drying), 40, 80, 120, 160, 200, 240 min. The results revealed that the TEMPERING process significantly reduced the drying time and ﬁssured kernels percentage. Moreover, for both varieties it was observed that the rice FISSURING decreased significantly by continuing the TEMPERING process until certain durations. Overall, for optimization of INTERMITTENT DRYING process in terms of the considered qualitative parameters, i.e. reducing energy consumption and losses, conducting 160 and 200 min TEMPERING process after 40 min drying was found appropriate for Hashemi and Koohsar varieties, respectively. In addition, according to the higher FISSURING for Koohsar (medium grain) compared to Hashemi (long grain), it can be concluded that physical properties such as kernel slenderness ratio is effective on its FISSURING.

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APA: Copy

GHASEMI, A., SADEGHI, M., & MIREEI, S.A.. (2016). EFFECT OF INTERMITTENT DRYING CONDITIONS ON FISSURING PERCENTAGE AND PROCESS DURATION OF LONG AND MEDIUM ROUGH RICE VARIETIES. JOURNAL OF CROP PRODUCTION AND PROCESSING, 5(18), 51-62. SID. https://sid.ir/paper/255845/en

Vancouver: Copy

GHASEMI A., SADEGHI M., MIREEI S.A.. EFFECT OF INTERMITTENT DRYING CONDITIONS ON FISSURING PERCENTAGE AND PROCESS DURATION OF LONG AND MEDIUM ROUGH RICE VARIETIES. JOURNAL OF CROP PRODUCTION AND PROCESSING[Internet]. 2016;5(18):51-62. Available from: https://sid.ir/paper/255845/en

IEEE: Copy

A. GHASEMI, M. SADEGHI, and S.A. MIREEI, “EFFECT OF INTERMITTENT DRYING CONDITIONS ON FISSURING PERCENTAGE AND PROCESS DURATION OF LONG AND MEDIUM ROUGH RICE VARIETIES,” JOURNAL OF CROP PRODUCTION AND PROCESSING, vol. 5, no. 18, pp. 51–62, 2016, [Online]. Available: https://sid.ir/paper/255845/en

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