Effects of ground insulation and greenhouse microenvironment on the rate and quality of biogas production

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dc.contributor.author Cheruiyot, P. K.
dc.contributor.author Ngunjiri, G. M.
dc.contributor.author Ndiema, C. K.
dc.contributor.author Chemelil, M. C.
dc.contributor.author Wambua, Raphael M.
dc.date.accessioned 2022-10-25T08:07:50Z
dc.date.available 2022-10-25T08:07:50Z
dc.date.issued 2009
dc.identifier.citation Science and Engineering Series, Vol. 12, No. 1, pp. 23 - 33 (2009) en_US
dc.identifier.issn 1019-1593
dc.identifier.uri https://www.ajol.info/index.php/ajst/article/view/155921
dc.identifier.uri http://repository.seku.ac.ke/handle/123456789/6897
dc.description DOI: 10.4314/bjt.v18i2.52254 en_US
dc.description.abstract A study was conducted at Egerton University, Njoro, Kenya to establish the potential of plastic digester to produce biogas under natural and greenhouse microenvironment. The specific objectives were to evaluate the effects of greenhouse and ground insulation on the rate and quality of biogas generation. A greenhouse measuring 6m long, 4m wide and 2m high was constructed. Inside the greenhouse and the outside environment, three replications of thirty (30)-litre plastic biogas digester filled to two third capacity with slurry were used. The digesters were partially exposed to the environment and when fully buried in the ground. Biogas yields averaged 90.3 and 63.0 litres per kilogramme (l/kg) of volatile solids added for partially buried digesters under greenhouse and natural conditions, respectively. The corresponding digester temperatures averaged 27.5 and 22.2oC. The respective biogas yields averaged 312.8 and 226 litres per kilogramme volatile solid added, while the temperatures averaged 27.9 and 24.1oC for fully buried digesters. The average methane content in the biogas was 61.5% and 56.4% under greenhouse and natural conditions, respectively. At the 0.05 significance level, greenhouse effect was found to enhance both the quantity and quality of biogas generation from dairy cattle dung. The effects of ground insulation had a far much effect on the quantity of biogas generation as compared to the effects of greenhouse conditions. Therefore ground insulation of plastic biogas digester under greenhouse conditions significantly enhances biogas generation. en_US
dc.language.iso en en_US
dc.publisher UNESCO en_US
dc.subject Anaerobic conditions en_US
dc.subject greenhouse en_US
dc.subject natural conditions en_US
dc.subject ground insulation en_US
dc.subject greenhouse effect en_US
dc.title Effects of ground insulation and greenhouse microenvironment on the rate and quality of biogas production en_US
dc.type Article en_US


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