Global Journal of Engineering and Technology Research (GJETR) · Research article · Open access
Design, Fabrication and Evaluation of a Mini-Biogas Plant with Automatic Pressure Relief Control for Power Generation
Alase David Ayomide, Prof. Aborisade David O
27 July 2026 · Vol. 2, Issue 7, pp. 302-311
DOI: 10.65150/EP-gjetr/V2E7/2026-08
Download full text (PDF)Cite this article
What is this article about?
The growing demand for decentralised, sustainable power in Nigeria, combined with the poor management of organic waste in rural and peri-urban areas, motivates the development of small-scale, waste-to-energy technologies. This paper reports the design, fabrication and performance evaluation of a mini-biogas plant that converts cow dung and kitchen waste into electricity through anaerobic digestion, gas conditioning and a modified petrol generator, while a fully passive, electronics-free automatic pressure relief system based on an adjustable water seal protects the digester from over-pressurisation.
Article at a glance
- Published
- 27 July 2026
- Volume / issue / pages
- Vol. 2, Issue 7, pp. 302-311
- ISSN
- 3051-3782 (online) · 3051-3774 (print)
- Licence
- CC BY 4.0 — free to read and reuse with attribution
- Peer review
- Double-blind, at least two independent reviewers
- Publisher
- EP Journals Group
Abstract
The growing demand for decentralised, sustainable power in Nigeria, combined with the poor management of organic waste in rural and peri-urban areas, motivates the development of small-scale, waste-to-energy technologies. This paper reports the design, fabrication and performance evaluation of a mini-biogas plant that converts cow dung and kitchen waste into electricity through anaerobic digestion, gas conditioning and a modified petrol generator, while a fully passive, electronics-free automatic pressure relief system based on an adjustable water seal protects the digester from over-pressurisation. The 1000 L high-density polyethylene (HDPE) digester was filled with 70% cow dung and 30% kitchen waste in the ratio of 1:1 of dung to water and kept under observation for 5 weeks of retention time.The pH of digester was maintained in the desired range of 6.8 to 7.5 from Week 2 onwards whereas the average digestion temperature ranged from 28.1 °C to 30.8 °C. Average biogas production was 0.92 m³/day (design target 0.5-1.5 m³/day), with a peak of 1.18 m³/day. Gas conditioning raised methane content from 58.4% in the raw biogas to 67.2% after CO₂ scrubbing, within the 60-70% target band. The water-seal pressure relief system activated within 3-4% of its calculated set point at all three tested submerged depths (8, 10 and 12 cm) and re-sealed within 4-6 seconds, confirming that safe, automatic pressure regulation can be achieved without sensors, controllers or external power. These results demonstrate that a low-cost, locally fabricated mini-biogas system with a passive safety mechanism is a technically viable route to decentralised electricity generation and organic-waste management in resource-limited settings.
Keywords: Biogas, Anaerobic Digestion, Mini Biogas Plant, Pressure Relief System, Power Generation.
Cite this article
Alase David Ayomide, & Prof. Aborisade David O (2026). Design, Fabrication and Evaluation of a Mini-Biogas Plant with Automatic Pressure Relief Control for Power Generation. Global Journal of Engineering and Technology Research, 2(7), 302-311. https://doi.org/10.65150/EP-gjetr/V2E7/2026-08
@article{Alase2026,
title = {Design, Fabrication and Evaluation of a Mini-Biogas Plant with Automatic Pressure Relief Control for Power Generation},
author = {Alase David Ayomide and Prof. Aborisade David O},
journal = {Global Journal of Engineering and Technology Research},
year = {2026},
volume = {2},
number = {7},
pages = {302-311},
doi = {10.65150/EP-gjetr/V2E7/2026-08},
url = {https://doi.org/10.65150/EP-gjetr/V2E7/2026-08}
}Questions about this article
Who wrote this article?
Alase David Ayomide, Prof. Aborisade David O.
Where and when was it published?
In Global Journal of Engineering and Technology Research, Volume 2, Issue 7, pages 302-311, published by EP Journals Group on 27 July 2026.
Is this article free to read?
Yes. It is open access under a Creative Commons Attribution 4.0 (CC BY 4.0) licence, so anyone can read, share and reuse it with attribution.
What is the DOI of this article?
10.65150/EP-gjetr/V2E7/2026-08 (https://doi.org/10.65150/EP-gjetr/V2E7/2026-08).
How do I cite this article?
APA: Alase David Ayomide, & Prof. Aborisade David O (2026). Design, Fabrication and Evaluation of a Mini-Biogas Plant with Automatic Pressure Relief Control for Power Generation. Global Journal of Engineering and Technology Research, 2(7), 302-311. https://doi.org/10.65150/EP-gjetr/V2E7/2026-08
More research from GJETR
- Optimized Deep Convolutional Networks for MRI Brain Tumor Classification and Segmentation: A Systematic Review
Maher Talal Al-Asaady · Oct 2026
- Industry Micro-Credential Infusion in PQF Level 5 Technology Diploma Programs: Opportunities and Challenges
Gamaliel B. Vicente Jr., Alma O. Medio, Redjie D. Arcadio · Oct 2026
- Assessment of Process Mapping, Risk Management, and Iso 9001 Quality Management Standards: Basis for a Technology-Enabled Quality Management Framework
Patrick E. Arendain, Redjie D. Arcadio · Oct 2026
- Integrating Solar-Powered PV Cells And SCR-Controlled Three-Phase Rectifiers to Design A Two-Level DC Grid Architecture
Sadia Sultana Turna, Amzad Ali Sarkar · Oct 2026
- Density Functional Theory Investigation of Defect-Induced Electronic Behavior in Iodine-Deficient Mapbi₃ Perovskites for Solar Cells
Sani Kado, Muhammad Y. Onimisi, Dahiru M. Sanni · Sept 2026