[Growth of Seliberia carboxydohydrogena carboxy bacteria with an altered composition of the gas mixture].
The growth and gas exchange of Seliberia carboxydohydrogena Z-1062 were studied in the regime of turbidostat when the conditions of gaseous nutrition were changed: a decrease in hydrogen concentration and an increase in carbon monoxide concentration, growth on two carbon sources (CO+CO2) and on two energy sources (H2+CO). The inhibition of the bacterial growth by CO was expressed in a decrease of the specific growth rate and in the reduced effectiveness of using a gaseous substrate. When the concentration of carbon monoxide was elevated from 0 to 40% and that of hydrogen was reduced from 80 to 40%, the specific growth rate of the cells was decreased from 0.4 to 0.04 h-1; here, the economic coefficient in terms of hydrogen fell from 3.6 to 0.62 g/g. The CO-oxidizing system of the bacterium was shown to be resistant. The rate of CO oxidation by the culture was from 0.6 to 0.8 L/h per 1 g of the synthesized biomass at the following concentration of gases in the medium (%); H2, 80-40; CO2, 5; O2, 15; CO, 10-40. The rate of CO oxidation by the culture rose when hydrogen concentration was decreased and CO concentration was increased.
D001419:Bacteria / Q000254:growth & development*; D001673:Biodegradation, Environmental; D002245:Carbon Dioxide / Q000378:metabolism; D002248:Carbon Monoxide / Q000378:metabolism; D003470:Culture Media / Q000378:metabolism; D005740:Gases / Q000378:metabolism*; D007220:Industrial Waste; D010084:Oxidation-Reduction
D003470:Culture Media; D005740:Gases; D007220:Industrial Waste; D002245:Carbon Dioxide; D002248:Carbon Monoxide
O roste karboksidobakteriĭ Seliberia carboxydohydrogena pri izmenenii sostava gazovoĭ smesi.