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Field performance of small scale anaerobic digesters treating food waste

Lou, X.F., Nair, J. and Ho, G.ORCID: 0000-0001-9190-8812 (2012) Field performance of small scale anaerobic digesters treating food waste. Energy for Sustainable Development, 16 (4). pp. 509-514.

Link to Published Version: http://dx.doi.org/10.1016/j.esd.2012.06.004
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Abstract

Internationally, it has been reported to have over 30 million small scale anaerobic digesters. Despite the large number of existing small scale anaerobic digesters and a growing interest in food waste digestion, there has been a paucity of research regarding low cost digester's performance. This paper aims to provide a snap shot of the performances of small scale digesters treating food waste exclusively. The performance of six small scale digesters, ranging from 1m 3 to 25m 3 were recorded and analysed. Results showed consistently high substrate degradation ranging from 92.5% to 97.5% COD with daily methane production ranging between 0.25m 3/kg VS and 0.46m 3/kg VS. Composition of biogas analyzed yielded between 63.1%-66.8% CH 4 and between 27.4%-33.3% CO 2. Results also revealed a negative linear correlation between gas production and % total solids and a positive linear correlation between gas production and the organic loading rate. While small scale digesters can effectively degrade food waste; the total dependency on digester for their gas requirements is unlikely and alternative fuel source is required.

Publication Type: Journal Article
Murdoch Affiliation: School of Environmental Science
Publisher: Elsevier BV
URI: http://researchrepository.murdoch.edu.au/id/eprint/12115
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