Development of Rice Milling Machine for Different Rice Varieties to Improve Product Quality

Abstract

The present research was carried out to develop and estimate some operating parameters and affecting the performance of a rice milling machine to improve product quality. The rice milling machine was developed by adding two units: cleaning unit to remove chaff and other foreign materials from rice grains before the milling operation and feed unit to adjust rice feed rate. The performance of the developed milling machine was studied under the following parameters: feed rate, drum speed, and grain moisture content in terms of overall machine efficiency, total grains losses, machine productivity, required power, specific energy and criterion cost. The experimental results reveal that the highest values of machine productivity and overall machine efficiency were 1.

Enhancing The Performance of Rice-Grain Milling Machine By Attaching A Developed Primary Cleaning-Unit تحسين اداء آلة تبييض الأرز بأضافة وحدة تنظيف أولية مطورة

“…The hopper bottom has 150 mm height with sidewall slope of 45 °. The milling drum speed is adjusted at 800 rpm (Morad et al, 2013). -The mill sieves unit: The mill sieves unit consists of upper and lower sieves.…”

“…The experimental results reveal that the cleaner performance was in the optimum region under sieve angle of 15° and paddy moisture content of 14 %. Morad et al (2013) found, during milling three rice grain varieties, that the highest values of rice-milling machine productivity and overall machine efficiency were 1.08, 1.17 and 1.35 Mg/h; and 95.00, 95.38 and 95.66 % for Sakha-101, Giza-171 and Sakha-105 varieties, respectively, while the lowest values of required power and specific energy were 13.0, 13.4 and 13.8 kW; and 17.40, 15.68 and 13.85 kWh/Mg, respectively, for the same rice varieties, furthermore the lowest values of both operational and criterion costs were 8. 53,7.87 and 6.82 L.E/Mg;and 35.96,31.96 and 29.38 L.E/Mg, respectively, for the same rice varieties.…”