Pre-Extension Demonstration and Evaluation of BAERC Model Engine Driven Coffee Dehuller in East Wollega Zone, Ethiopia

Girma Ajama

doi:doi:10.11648/j.ajetm.20261104.12

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Pre-Extension Demonstration and Evaluation of BAERC Model Engine Driven Coffee Dehuller in East Wollega Zone, Ethiopia

Girma Ajama^*

Published in American Journal of Engineering and Technology Management (Volume 11, Issue 4)

Received: 10 August 2026 Accepted: 24 August 2026 Published: 29 September 2026

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Abstract

Coffee agriculture is critical to the Ethiopian economy, with around a quarter of the people relying on it directly or indirectly for survival. Yet there are still problems associated with the way coffee is currently processed that underscore the need for mechanized alternative capable of improving efficiency, preserve coffee quality and boost smallholder income. Cognizant of this engine operated coffee dehuller was demonstrated with the specific objectives of enhancing farmers’ awareness of coffee dehuller, evaluating its performance, and assessing participant stakeholders’ feedback. The participants were determined through purposive sampling out of the households residing in Gammachis and Falamo-Yubdo kebeles. Data were gathered focus group discussions, measurement and observation and were analyzed adopting simple deceptive statistics. The result revealed that total cost of operation for coffee dehulling by BAERC coffee dehuller were found 77% cheaper than the traditional method of dehulling done by woody pestle and mortar, The saving in time also 89.58 in percent. This result could typically support the conclusion that adoption and use of demonstrated dehuller. Therefore, the machine was recommended to scaling up and diffusion for greater impacts.

Published in	American Journal of Engineering and Technology Management (Volume 11, Issue 4)
DOI	10.11648/j.ajetm.20261104.12
Page(s)	73-81
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2026. Published by Science Publishing Group

Keywords

Coffee, Coffee Dehuller, Demonstration, Operating Cost, Mortar and Pestle

References

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[2]	Arai Y, Hundera K and Yoshikura T. Challenges in conserving forest ecosystems through coffee certification: a case study from southwestern Ethiopia. Frontiers in Environmental Science. 2024, 11: 1193242. https://doi.org/10.3389/fenvs.2023.1193242
[3]	Dagnachew Tolessa. Coffee and Food Production in East Wollega in the 2 Century: An Overview. American Research Journal of History and Culture. 2016, vol. 3(11), pp: 1-12.
[4]	EAFCA (East Africa Fine Coffee Association). Coffee Outlook, 2010.
[5]	EWZALO (East Wollega Zone Agriculture and Land Office) 2024. Unpupblished Annual Report.
[6]	FDRE 2003. Comprehensive Coffee Development and Marketing Plan. Addis Ababa: Federal Democratic Republic of Ethiopia, Ministry of Agriculture and Rural Development.
[7]	Gelgelo Kibi, Taresa Diro, Burtikan Makonon, Desta Abera.2023. Improvement and on Farm Evaluation Bako Model Coffee De-Hulling Machine. In: Kamil Ahmed, Dulo Husen, Abulasan Kabaradin, Asnake Tilaye, Gudeta Genemo., Husen Bona, Merga Warqesa, Adem Tibesso, Duresa Tesfaye & Ashebir Tsagaye (Eds.), Proceedings of Review Workshop on Completed Research Activities of Agricultural Engineering Research Directorate held at Oromia Agricultural Research Institute (IQQO), 30 October to 03 November 2023, IQQO HQ Finfinnee, Ethiopia. PP: 305-311.
[8]	Girma, Adugna, Bayeta Belachew, Tesfaye Shimber, Endale Taye and Taye Kufa. 2018. Coffee Industry and Knowledge. Group discussions, synthesis and recommendations. PP: 505-510. Proceedings on Four Decades of Coffee Research and Development in Ethiopia, A National Workshop, 14-17, August 2007, Ghion Hotel, Addis Ababa.
[9]	Gurmessa, N. E.; Agwanda, C.; Oduor, G.; Musebe, R. O.; Akiri, M.; Romney, D. Sustainability and Gender Dynamics of Coffee Value-Chain Development Intervention: Lessons from Ethiopia. Sustainability 2022, 14, 11928. https://doi.org/10.3390/su141911928
[10]	ICO. “The Value of Coffee. Sustainability, Inclusiveness, and Resilience of the Coffee Global Value Chain,” 2020.
[11]	International Trade Administration. 2024. Ethiopia - Agricultural Sectors. Available at: https://www.trade.gov/country-commercial-guides/ethiopia-agricultural-sectors#:~:text=Overview,help%20to%20boost%20agricultural%20output
[12]	ITC (International Trade Center) 2024. Ethiopia Coffee Quality Improvement Project. Aid for Trade: Global Review.
[13]	MoA 2014. Growth and Transformation Plan ІІ (GTP ІІ) Coffee Sector Plan. Amharic Version.
[14]	Mulesa, Teshome Hunduma; Dalle, Sarah Paule; Makate, Clifton; Haug, Ruth; Westengen, Ola Tveitereid (2021-02-20). "Pluralistic Seed System Development: A Path to Seed Security?"
[15]	Tadesse B, Tilahun Y, Bekele T, Mekonen G. Assessment of challenges of crop production and marketing in Bench-Sheko, Kaffa, Sheka, and West-Omo zones of Southwest Ethiopia. Heliyon. 2021, 7(6). https://doi.org/10.1016/j.heliyon.2021.e07319
[16]	Teshome Hunduma, "Local Crop Genetic Resource Utilization and Management in Gindeberet, west central Ethiopia", Master's thesis for the Norwegian University of Life Sciences (May 2006), pp. 27-29.
[17]	USDA FAS (Foreign Agricultural Service), “Ethiopia: Coffee Annual,” 19 May 2023.
[18]	DWALO (Diga Woreda Agriculture and Land Office). 2024. 2nd Quarter report. Unpublished document.

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APA Style

Ajama, G. (2026). Pre-Extension Demonstration and Evaluation of BAERC Model Engine Driven Coffee Dehuller in East Wollega Zone, Ethiopia. American Journal of Engineering and Technology Management, 11(4), 73-81. https://doi.org/10.11648/j.ajetm.20261104.12

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ACS Style

Ajama, G. Pre-Extension Demonstration and Evaluation of BAERC Model Engine Driven Coffee Dehuller in East Wollega Zone, Ethiopia. Am. J. Eng. Technol. Manag. 2026, 11(4), 73-81. doi: 10.11648/j.ajetm.20261104.12

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AMA Style

Ajama G. Pre-Extension Demonstration and Evaluation of BAERC Model Engine Driven Coffee Dehuller in East Wollega Zone, Ethiopia. Am J Eng Technol Manag. 2026;11(4):73-81. doi: 10.11648/j.ajetm.20261104.12

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@article{10.11648/j.ajetm.20261104.12,
  author = {Girma Ajama},
  title = {Pre-Extension Demonstration and Evaluation of BAERC Model Engine Driven Coffee Dehuller in East Wollega Zone, Ethiopia},
  journal = {American Journal of Engineering and Technology Management},
  volume = {11},
  number = {4},
  pages = {73-81},
  doi = {10.11648/j.ajetm.20261104.12},
  url = {https://doi.org/10.11648/j.ajetm.20261104.12},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajetm.20261104.12},
  abstract = {Coffee agriculture is critical to the Ethiopian economy, with around a quarter of the people relying on it directly or indirectly for survival. Yet there are still problems associated with the way coffee is currently processed that underscore the need for mechanized alternative capable of improving efficiency, preserve coffee quality and boost smallholder income. Cognizant of this engine operated coffee dehuller was demonstrated with the specific objectives of enhancing farmers’ awareness of coffee dehuller, evaluating its performance, and assessing participant stakeholders’ feedback. The participants were determined through purposive sampling out of the households residing in Gammachis and Falamo-Yubdo kebeles. Data were gathered focus group discussions, measurement and observation and were analyzed adopting simple deceptive statistics. The result revealed that total cost of operation for coffee dehulling by BAERC coffee dehuller were found 77% cheaper than the traditional method of dehulling done by woody pestle and mortar, The saving in time also 89.58 in percent. This result could typically support the conclusion that adoption and use of demonstrated dehuller. Therefore, the machine was recommended to scaling up and diffusion for greater impacts.},
 year = {2026}
}

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TY  - JOUR
T1  - Pre-Extension Demonstration and Evaluation of BAERC Model Engine Driven Coffee Dehuller in East Wollega Zone, Ethiopia
AU  - Girma Ajama
Y1  - 2026/09/29
PY  - 2026
N1  - https://doi.org/10.11648/j.ajetm.20261104.12
DO  - 10.11648/j.ajetm.20261104.12
T2  - American Journal of Engineering and Technology Management
JF  - American Journal of Engineering and Technology Management
JO  - American Journal of Engineering and Technology Management
SP  - 73
EP  - 81
PB  - Science Publishing Group
SN  - 2575-1441
UR  - https://doi.org/10.11648/j.ajetm.20261104.12
AB  - Coffee agriculture is critical to the Ethiopian economy, with around a quarter of the people relying on it directly or indirectly for survival. Yet there are still problems associated with the way coffee is currently processed that underscore the need for mechanized alternative capable of improving efficiency, preserve coffee quality and boost smallholder income. Cognizant of this engine operated coffee dehuller was demonstrated with the specific objectives of enhancing farmers’ awareness of coffee dehuller, evaluating its performance, and assessing participant stakeholders’ feedback. The participants were determined through purposive sampling out of the households residing in Gammachis and Falamo-Yubdo kebeles. Data were gathered focus group discussions, measurement and observation and were analyzed adopting simple deceptive statistics. The result revealed that total cost of operation for coffee dehulling by BAERC coffee dehuller were found 77% cheaper than the traditional method of dehulling done by woody pestle and mortar, The saving in time also 89.58 in percent. This result could typically support the conclusion that adoption and use of demonstrated dehuller. Therefore, the machine was recommended to scaling up and diffusion for greater impacts.
VL  - 11
IS  - 4
ER  -

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Author Information

Girma Ajama

Bako Agricultural Engineering Research Center, Oromia Agricultura Research Institute, Finfine, Ethiopia

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Plain Text BibTeX RIS

APA Style

Ajama, G. (2026). Pre-Extension Demonstration and Evaluation of BAERC Model Engine Driven Coffee Dehuller in East Wollega Zone, Ethiopia. American Journal of Engineering and Technology Management, 11(4), 73-81. https://doi.org/10.11648/j.ajetm.20261104.12

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ACS Style

Ajama, G. Pre-Extension Demonstration and Evaluation of BAERC Model Engine Driven Coffee Dehuller in East Wollega Zone, Ethiopia. Am. J. Eng. Technol. Manag. 2026, 11(4), 73-81. doi: 10.11648/j.ajetm.20261104.12

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AMA Style

Ajama G. Pre-Extension Demonstration and Evaluation of BAERC Model Engine Driven Coffee Dehuller in East Wollega Zone, Ethiopia. Am J Eng Technol Manag. 2026;11(4):73-81. doi: 10.11648/j.ajetm.20261104.12

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@article{10.11648/j.ajetm.20261104.12,
  author = {Girma Ajama},
  title = {Pre-Extension Demonstration and Evaluation of BAERC Model Engine Driven Coffee Dehuller in East Wollega Zone, Ethiopia},
  journal = {American Journal of Engineering and Technology Management},
  volume = {11},
  number = {4},
  pages = {73-81},
  doi = {10.11648/j.ajetm.20261104.12},
  url = {https://doi.org/10.11648/j.ajetm.20261104.12},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajetm.20261104.12},
  abstract = {Coffee agriculture is critical to the Ethiopian economy, with around a quarter of the people relying on it directly or indirectly for survival. Yet there are still problems associated with the way coffee is currently processed that underscore the need for mechanized alternative capable of improving efficiency, preserve coffee quality and boost smallholder income. Cognizant of this engine operated coffee dehuller was demonstrated with the specific objectives of enhancing farmers’ awareness of coffee dehuller, evaluating its performance, and assessing participant stakeholders’ feedback. The participants were determined through purposive sampling out of the households residing in Gammachis and Falamo-Yubdo kebeles. Data were gathered focus group discussions, measurement and observation and were analyzed adopting simple deceptive statistics. The result revealed that total cost of operation for coffee dehulling by BAERC coffee dehuller were found 77% cheaper than the traditional method of dehulling done by woody pestle and mortar, The saving in time also 89.58 in percent. This result could typically support the conclusion that adoption and use of demonstrated dehuller. Therefore, the machine was recommended to scaling up and diffusion for greater impacts.},
 year = {2026}
}

Copy | Download

TY  - JOUR
T1  - Pre-Extension Demonstration and Evaluation of BAERC Model Engine Driven Coffee Dehuller in East Wollega Zone, Ethiopia
AU  - Girma Ajama
Y1  - 2026/09/29
PY  - 2026
N1  - https://doi.org/10.11648/j.ajetm.20261104.12
DO  - 10.11648/j.ajetm.20261104.12
T2  - American Journal of Engineering and Technology Management
JF  - American Journal of Engineering and Technology Management
JO  - American Journal of Engineering and Technology Management
SP  - 73
EP  - 81
PB  - Science Publishing Group
SN  - 2575-1441
UR  - https://doi.org/10.11648/j.ajetm.20261104.12
AB  - Coffee agriculture is critical to the Ethiopian economy, with around a quarter of the people relying on it directly or indirectly for survival. Yet there are still problems associated with the way coffee is currently processed that underscore the need for mechanized alternative capable of improving efficiency, preserve coffee quality and boost smallholder income. Cognizant of this engine operated coffee dehuller was demonstrated with the specific objectives of enhancing farmers’ awareness of coffee dehuller, evaluating its performance, and assessing participant stakeholders’ feedback. The participants were determined through purposive sampling out of the households residing in Gammachis and Falamo-Yubdo kebeles. Data were gathered focus group discussions, measurement and observation and were analyzed adopting simple deceptive statistics. The result revealed that total cost of operation for coffee dehulling by BAERC coffee dehuller were found 77% cheaper than the traditional method of dehulling done by woody pestle and mortar, The saving in time also 89.58 in percent. This result could typically support the conclusion that adoption and use of demonstrated dehuller. Therefore, the machine was recommended to scaling up and diffusion for greater impacts.
VL  - 11
IS  - 4
ER  -

Copy | Download