Premium
Comparative Study on the Performance of Aboveground and Underground Fixed‐Dome Biogas Digesters
Author(s) -
Obileke KeChrist,
Mamphweli Sampson,
Meyer Edson L.,
Makaka Golden,
Nwokolo Nwabunwanne,
Onyeaka Helen
Publication year - 2020
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201900378
Subject(s) - biogas , environmental science , dome (geology) , waste management , hydraulic retention time , anaerobic digestion , polyethylene , materials science , methane , environmental engineering , engineering , chemistry , composite material , sewage treatment , geology , paleontology , organic chemistry
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.