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- W2738372214 abstract "CO2 fixation by a hydrogen-oxidizing bacterium, Cupriavidus necator, was evaluated in a packed bed bioreactor under a constant flow rate of gas mixtures (H2, O2, CO2). The overall energy efficiency depends on the efficiencies of CO2 fixation into carbohydrate and the reduced carbon into biomass and bioproducts, respectively. The efficiencies varied with the limiting gas substrate. Under O2 limitation, the efficiency (20–30%) of CO2 fixation increased with time and was higher than the overall efficiency (12–18%). Under H2 limitation, the efficiency of CO2 fixation declined with time while the biomass yield was quite similar to that under O2 limitation. A cellular metabolic model was suggested for the lithoautotrophic growth of C. necator, including CO2 fixation into carbohydrate followed by the main metabolic pathway of reduced carbon. Under CO2 limitation, most H2 energy was wasted, resulting in a very low biomass yield. Under a dual limitation of O2 and nitrogen, biosynthesis of poly(3-hydroxybutyrate) was triggered, and the energy efficiency or yield of biopolyester was lower than those of microbial cell mass. Compared with a green microalga Neochloris oleoabundans that produces lipid under nutrient limitation, C. necator exhibited a much higher (3–6 times) energy efficiency in producing biomass and bioproducts from CO2." @default.
- W2738372214 created "2017-07-31" @default.
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- W2738372214 date "2017-11-01" @default.
- W2738372214 modified "2023-10-14" @default.
- W2738372214 title "Comparison analysis on the energy efficiencies and biomass yields in microbial CO 2 fixation" @default.
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- W2738372214 doi "https://doi.org/10.1016/j.procbio.2017.07.007" @default.
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