Energetics of the growth of Methanobacterium thermoautotrophicum and Methanococcus thermolithotrophicus on ammonium chloride and dinitrogen |
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Authors: | M. -L. Fardeau J. -P. Peillex J. -P. Belaïch |
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Affiliation: | (1) Laboratoire de Chimie Bactérienne, Université de Provence, C.N.R.S., B.P. 71, F-13277 Marseille Cédex 9, France |
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Abstract: | Methanobacterium thermoautotrophicum was grown in continuous culture in a fermenter gassed with H2 and CO2 as sole carbon and energy sources, and in a medium which contained either NH4Cl or gaseous N2 as nitrogen source. Growth was possible with N2. Steady states were obtained at various gas flow rates with NH4Cl and with and the maintenance coefficient varied with the gas input and with the nitrogen source. Growth of Methanococcus thermolithotrophicus in continuous culture in a fermenter gassed with H2, CO2 as nitrogen, carbon and energy sources was also examined.Abbreviations molecular growth yield (g dry weight of cells per mol of CH4 evolved) - growth rate (h-1) - D dilution rate (h-1) - rate (h-1); relation of Neijssel and Tempest and of Stouthamer and Bettenhaussen - energy |
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Keywords: | Methanobacterium thermoautotrophicum Methanococcus thermolithotrophicus Growth rates Growth yields Biomass Maintenance coefficient NH4Cl– N2 |
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