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Development and Testing of Pt Operated Mobile Rice Huller

Md. Abul Quasem
Senior Scientific Officer
Farm Machinery and Postharvest Technology Division, Bangladesh Rice Research Institute, Gazipur-1701.

Dr, MA Baqui
Chief Scientific Officer and Head
Farm Machinery and Postharvest Technology Division, Bangladesh Rice Research Institute, Gazipur-1701.

Abstract/ Executive Summary:

A small rice huller (No-4) was fitted to the front base of a power tiller. The milling capacity for raw paddy was 138.75 kg/hr and that for parboiled paddy was 148.25 kg/hr. Performance in terms of capacity was satisfactory. Broken rice were slightly higher (27.8% to 30.5%) for raw paddy milling due to insect damaged paddy and high moisture (13.5% to 13.8%). The tested PT operated mobile huller was suitable for small-scale rice milling.

Keywords: Milling capacity, Head rice, Broken rice,

Location:

Start Date: 01-07-2000

End Date: 30-06-2001

Program Area: Farm Mechanization

Commodity: Huller

Objectives:

1. To develop a mobile rice huller milling system for remote rural area.

2. To test the performance of the huller milling system

Methodology:

A small rice huller (No-4) was fitted to the front base of a Power tiller. A cast iron pulley of 5.5 inch diameter was fitted to the engine fly wheel. Another pulley of 13 inch diameter was fitted to the huller shaft. A B-type V-belt was used to transfer power to the huller from the engine. This pulley system provided the huller speed in the range of 710 to 830 rpm which was suitable for milling rice.

Source of Information: BRRI Annual Research Review 2000-01

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Both raw and parboiled paddy was milled with the huller. The huller was set at a distance of 27 inch from the centre of the flywheel. The huller speed of 710 to 730 rpm, it provided the best hulling performance. The milling capacity for raw paddy was 138.75 kg/hr and that for parboiled paddy was 148.25 kg/hr. The performance in terms of capacity was satisfactory. Lower capacity for raw paddy was due to compact husk compared to that of parboiled paddy. Huller speed was maintained (710-750 rpm) for both the raw & parboiled paddy milling. Head rice from raw paddy milling was in the range of 59.5% to 61%, large broken was in the ranges of 9.7% to 11.23% and small broken was in the range of 27.80% to 30.50%. Broken rice were higher compared to normal range (20%) close to for steel huller performance. Higher breakage and low head rice yield were due to high moisture paddy (13.5% to 13.8%) and insect damaged paddy. Head rice from parboiled paddy was in the range of 87.9% to 88.96%, large broken was in the range of 3.15% to 4.69% and small broken was in the range of 6.34% to 7.62%. These figures were within the normal range for parboiled paddy milling in steel huller. Milling quality for both the raw & parboiled paddy was found as “well milled”. Therefore, this power tiller operated mobile huller was suitable for small-scale rice milling.

Knowledge Management: Report/Proceedings