2012•Journal of Lanzhou University of TechnologyRequires access
Influence of temperature on composition of biogas fermented in high-concentrated thermostatic anaerobic environment
Rong Feng
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Abstract
In order to study the influence of temperature on composition of biogas fermented in high-concentrated thermostatic anaerobic environment,the process of anaerobic fermentation of fresh cattle manure with solid concentration of 15% was experimentally investigated,four parallel anaerobic digesters of 11.5 L in volume at 19,30,37 ℃ and 52 ℃ respectively in batch mode.Real-time measurement of biogas compositions was carried out with biogas analyzer.The experimental result showed that the highest cumulative yield of biogas and the highest methane yield took place at 37 ℃,the former being 232 L and the latter being 116.1 L,which compared with the yields at 30,52 ℃ were more than 18.2 L and 15.6 L.The average methane volume content in anaerobic fermentation at 52,37 ℃ and 30 ℃ was 46.6%,46.5% and 43.6%,respectively.