A simple and low-cost de-huller powered by a 5-horsepower diesel engine that can be used to de-hull dry coffee materials was adapted. The coffee de-huller machine was evaluated at different drum and feeding rates on the farm. The results obtained show that the de-hulling efficiency, percentage of breakage, and cleaning efficiency increased as the drum speed increased between 400 and 600 rpm. The highest averages of de-hulling efficiency, cleaning efficiency, percentage of breakage, and capacity were 97.34%, 98.77%, 3.18%, and 358.7 kg/hr, respectively. High de-hulling and cleaning efficiencies and a low percentage of breakage obtained show that the machine is very appropriate for handling coffee processing.

Keywords: Coffee, Percentage of breakage, De-huller efficiency, Cleaning efficiency, De-hulling capacity, Cost analysis, Break-even point.

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Source of Funding:

This study has not received any funds from any organization.

Conflict of Interest:

The authors declare that they have no conflict of interest.

Consent for Publication:

The authors declare that they consented to the publication of this study.

Authors’ Contribution:

Abayineh Awgichew participated in the idea or design of the scheme, data gathering, analysis, interpretation, article drafting, article revision, and final approval of the manuscript. Rabira Nuguse helped with data gathering, article drafting, article revision, and final approval of the manuscript.