Optimization of Otake FC2K impeller huller settings for milling of Indica Rice (Oryza sativa L.) varieties in the Philippines

Date

6-2016

Degree

Bachelor of Science in Agricultural and Biosystems Engineering

Major Course

Major in Agricultural and Bio-Process Engineering

College

College of Engineering and Agro-Industrial Technology (CEAT)

Adviser/Committee Chair

Ma. Cristine Concepcion D. Ignacio

Abstract

The Otake FC2K is an impeller huller with reported high hulling efficiency however it was designed specifically for Japonica grains. This study aimed to optimize the huller settings for Philippine Indica rice varieties including short grain (Kinandang Pula), medium grain (Burdagol) and long grain (Jasmine). Parameters included spindle speed (3960 rpm, 4475 rpm, 4990 rpm), moisture content (MC) (14% w.b., 18%w.b., and 22% w.b.) and feed rate (0.3 kg/s, 0.4 kg/s, 0.5 kg/s). Analysis of Variance (ANOVA) of short grain exhibited that at 95% confidence level, shaft speed significantly affected all response parameters while MC only affected hulling efficiency and hulling recovery. Feed rate did not have a significant effect on the responses. For medium grain, shaft speed significantly affected broken rice percentage while MC significantly affected broken rice percentage at 90% confidence level. Moreover, the stationary points of all responses except hulling recovery for medium and broken rice percentage for Jasmine were saddle points. Hence, optimum hulling conditions were only indicated through the direction of the region where it exists. Overall optimum settings for each variety were as follows: for short grain, 3930 rpm, 14% and 0.5 kg/s for medium grain 4990 rpm, 14% and 0.5 kg/s and for long grain, 3960 rpm, 22% and 0.5 kg/s.

Language

English

Location

UPLB College of Engineering and Agro-Industrial Technology (CEAT)

Call Number

LG 993.5 2016 A2 /O44

Document Type

Thesis

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