Study of the performance of a thermophilic biological methanation system.
This study investigated the operation of ex-situ biological methanation at two thermophilic temperatures (55°C and 65°C). Methane composition of 85-88% was obtained and volumetric productivities of 0.45 and 0.4LCH4/Lreactor were observed at 55°C and 65°C after 24h respectively. It is postulated that at 55°C the process operated as a mixed culture as the residual organic substrates in the starting inoculum were still available. These were consumed prior to the assessment at 65°C; thus the methanogens were now dependent on gaseous substrates CO2 and H2. The experiment was repeated at 65°C with fresh inoculum (a mixed culture); methane composition and volumetric productivity of 92% and 0.46LCH4/Lreactor were achieved in 24h. Methanothermobacter species represent likely and resilient candidates for thermophilic biogas upgrading.
['Guneratnam|Amita Jacob|AJ|', 'Ahern|Eoin|E|', 'FitzGerald|Jamie A|JA|', 'Jackson|Stephen A|SA|', 'Xia|Ao|A|', 'Dobson|Alan D W|ADW|', 'Murphy|Jerry D|JD|']
D056804:Biofuels D019149:Bioreactors D019605:Euryarchaeota D008697:Methane D013696:Temperature
Biological methanation Biogas Methanogenic archaea Power to gas Volatile fatty acids