Effects of grain moisture content on milling recovery, power consumption and grain temperature

Date

1983

Abstract

The study was conducted to determine the effects of four levels of grain moisture content 18%, 16%, 14% and 12% wet basis on the milling recovery, power consumption and grain temperature. Other parameters involved were hulling efficiency, head or broken grain recovery. The test was done using three different varieties IR50, IR54 and IR42, with IR50 and IR54 classified as long and slender varieties while IR42 is a medium grain based on the model grading system. The three varieties were milled in the rubber roll or Japanese system and the Conventional or ?cono? milling system. Experimental results showed an inverse proportionality between moisture content and milling recovery. On the other hand, a direct proportionality between moisture content and power consumption was observed. Grain temperature varied with the ambient environment, that is the initial temperature in the whitening system. The higher the initial temperature the higher would be the grain temperature. However, the temperature rise at different moisture levels was statistically insignificant. Other results showed that the Japanese system gives a relatively higher milling recovery than the Conventional system. However, the conventional milling system showed some capabilities of wet milling (18% MC). This can be explained to the resiliency of the grain due to the added moisture. IR42 which is a medium grain had a slightly higher milling and head rice recoveries than IR50 or IR54 which are long varieties. The difference, however, was statistically insignificant.

Document Type

Master Thesis

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 995 1983 A2 M33

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