Investigating Esfahan rice varieties losses in blade and abrasive whiteners and determination of their appropriate milling moisture.
2009
Heydari Soltan Abadi, Mohsen | Mohammadi, Hassan | Shaker, Mohammad
Decrease of losses is a way to achieve agriculture self-production. There are many parameters affect on rice quality and quantity losses such as processing systems and grain moisture content. The aim of this study was to compare the systems that include abrasive and blade (Engelberg) whitening, in terms of grain breakage percentage and degree of milling. In addition, optimum milling moisture content was determined in both systems. For these purpose, the effect of two types of whiteners (abrasive and Engelberg) was investigated on three rice cultivars (Sorkhe, Sazandegi and Tarom) in four different rice moisture contents (14, 12, 10 and 8 percent) on rice quality using a factorial test based on complete randomized block design with three replications. Rice breakage percentage and degree of milling were measured in each treatment. In each system, work capacity and power consumption were measured. The results showed that the effect of rice cultivar, whitener type, moisture content and their interactions on rice breakage percentage and degree of milling caused significant differences at 1% level. Based on results, Sorkhe and Tarom rice cultivars have minimum and maximum of rice breakage percentage respectively. Rice breakage percentage and degree of milling were less in abrasive whitener than in Engelberg whitener. Sample with 14% of moisture content had minimum degree of milling and maximum rate of breakage percentage. The optimum moisture contents for milling of Sorkhe, Sazandegi and Tarom rice cultivars were 10%, 12% and 10% respectively in abrasive whitener while for the above cultivars, the optimum moisture contents were 10%, 12% and12% respectively in Engelberg. Work capacity and power consumption were 1.7 and 3.43 times higher in abrasive than blade system respectively.
Show more [+] Less [-]AGROVOC Keywords
Bibliographic information
This bibliographic record has been provided by Agricultural Research and Education Organization