Biogas production from cow dungs using a modified fixed-dome digester
Department of Mechanical Engineering, University of Port Harcourt.
Research Article
Global Journal of Engineering and Technology Advances, 2021, 07(03), 224–230.
Article DOI: 10.30574/gjeta.2021.7.3.0066
Publication history:
Received on 28 March 2021; revised on 15 June 2021; accepted on 18 June 2021
Abstract:
A modified fixed dome digester with stirring mechanism has been designed and constructed and used for the anaerobic digestion of cow dung slurry at 5%-7% Total solid (TS) concentration within the mesophylic temperature range. The quality of biogas gas produced was between 54%-69% methane (CH4) content. The Carbon to Nitrogen ratio (C: N) varied between 35:1 - 45:1. Total biogas yield obtained over the detention period was about 261 L. The maximum and minimum temperatures recorded over the 95 days period was 32oC and 25 oC respectively. The volume of biogas yield, Vb (m3) was observed to increase with the percentage total solid, PTS (%). The details of the design and construction of the biogas digester plant and its cost are reported. The performance of the plant was very satisfactory. Investigation into the anaerobic digestion revealed that cow dung has great potentials for generation of biogas.
Keywords:
Fixed dome digester; anaerobic digestion; Cow dung; Total solid; mesophylic temperature range
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