INFLUENCE OF TEMPERATURE, AIR VELOCITY AND PRETREATMENTS ON DRYING THOMPSON SEEDLESS GRAPES

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GHOLAMI PORSHOKOOHI M.; MINAEI S.; BORGHEI A.M.; BASIRI A.

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Journal: JOURNAL OF AGRICULTURAL ENGINEERING RESEARCH Year:2008 | Volume:8 | Issue:4 Page(s): 65-80

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Title

INFLUENCE OF TEMPERATURE, AIR VELOCITY AND PRETREATMENTS ON DRYING THOMPSON SEEDLESS GRAPES

Author(s)

GHOLAMI PORSHOKOOHI M. | MINAEI S. | BORGHEI A.M. | BASIRI A. | Issue Writer Certificate

Keywords

AIR VELOCITYQ3

DRYINGQ4

GRAPEQ3

PRETREATMENTQ4

TEMPERATUREQ3

Abstract

Drying is one of the most important steps in raisin processing. During this step, initial moisture content decreases up to 15-17% (db) for suitable storage. Achieving optimum DRYING conditions can affect the processing time and improve raisin quality. TEMPERATURE, AIR VELOCITY and PRETREATMENT are important factors in the quality of the GRAPE DRYING process. In this research, the effect of TEMPERATURE at 50oC, 60oC, 70oC, and 80oC, AIR VELOCITY at 1, 2 and 3 m/s, and four PRETREATMENTs (hot water, 5% potassium carbonate, 0.4% olive oil, 0.5% sodium hydracids) and no PRETREATMENT were measured. Diffusivity and activation energy of all treatments were determined. The results of ANOVA showed that TEMPERATURE, AIR VELOCITY and PRETREATMENT have significant effects on DRYING time and average DRYING rate. PRETREATMENT has a significant effect on the DRYING process and decreases the DRYING time up to 69% at some TEMPERATURE levels. Also, increasing the TEMPERATURE decreases DRYING time up to 66% for some PRETREATMENTs. Increasing the hot AIR VELOCITY decreases it about 8.6%.

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APA: Copy

GHOLAMI PORSHOKOOHI, M., MINAEI, S., BORGHEI, A.M., & BASIRI, A.. (2008). INFLUENCE OF TEMPERATURE, AIR VELOCITY AND PRETREATMENTS ON DRYING THOMPSON SEEDLESS GRAPES. JOURNAL OF AGRICULTURAL ENGINEERING RESEARCH, 8(4), 65-80. SID. https://sid.ir/paper/27971/en

Vancouver: Copy

GHOLAMI PORSHOKOOHI M., MINAEI S., BORGHEI A.M., BASIRI A.. INFLUENCE OF TEMPERATURE, AIR VELOCITY AND PRETREATMENTS ON DRYING THOMPSON SEEDLESS GRAPES. JOURNAL OF AGRICULTURAL ENGINEERING RESEARCH[Internet]. 2008;8(4):65-80. Available from: https://sid.ir/paper/27971/en

IEEE: Copy

M. GHOLAMI PORSHOKOOHI, S. MINAEI, A.M. BORGHEI, and A. BASIRI, “INFLUENCE OF TEMPERATURE, AIR VELOCITY AND PRETREATMENTS ON DRYING THOMPSON SEEDLESS GRAPES,” JOURNAL OF AGRICULTURAL ENGINEERING RESEARCH, vol. 8, no. 4, pp. 65–80, 2008, [Online]. Available: https://sid.ir/paper/27971/en

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