Comparative Study on the Performance of Aboveground and Underground Fixed-Dome Biogas Digesters

Ke Christ Obileke*, Sampson Mamphweli, Edson L. Meyer, Golden Makaka, Nwabunwanne Nwokolo, Helen Onyeaka

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


A comparative analysis of aboveground and underground biogas digesters is described in relation to their performance and effect of temperature, pH, and hydraulic retention time. The digestion chamber of the two biogas systems under study was fabricated using high-density polyethylene (HDPE) plastic, while the inlet and outlet chamber were constructed with bricks. The performance of small-scale digesters, particularly of the fixed-dome type, should be improved. Cow dung served as substrate in the performance test. Biogas production from the two systems was measured by a customized gas temperature pressure measurement sensor. Evidently, the insulation provided to the underground digester helped to achieve a more stable internal temperature for the digester.

Original languageEnglish
Pages (from-to)68-74
Number of pages7
JournalChemical Engineering and Technology
Issue number1
Publication statusPublished - 1 Jan 2020

Bibliographical note

Funding Information:
The authors would like to acknowledge the Energy and Water Sector Education and Training Authority (EWSETA) for financing the study as well as the staff and students of Fort Hare Institute of Technology for their contributions. The authors have declared no conflict of interest.

Publisher Copyright:
© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim


  • Biogas digesters
  • Biogas production
  • Renewable energy

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering
  • Industrial and Manufacturing Engineering


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