کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1047226 | 945197 | 2012 | 6 صفحه PDF | دانلود رایگان |

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 1 m3 to 25 m3 were recorded and analysed. Results showed consistently high substrate degradation ranging from 92.5% to 97.5% COD with daily methane production ranging between 0.25 m3/kg VS and 0.46 m3/kg VS. Composition of biogas analyzed yielded between 63.1%–66.8% CH4 and between 27.4%–33.3% CO2. 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.
► Five operating anaerobic digesters fed exclusively with food waste were monitored.
► Substrate degradation ranged between 92.5% and 97.5% chemical oxygen demand.
► Daily methane production ranging between 0.25 and 0.46 m3/kg VS.
► Negative linear correlation between gas production and %TS.
► Positive linear correlation between gas production and organic loading rate.
Journal: Energy for Sustainable Development - Volume 16, Issue 4, December 2012, Pages 509–514