Analysis of process related factors to increase volumetric productivity and quality of biomethane with Methanothermobacter marburgensis

Seifert, Arne H.; Rittmann, Simon K.-M. R.; Herwig, Christoph

doi:10.1016/j.apenergy.2014.07.002

Cited by 105 publications

(74 citation statements)

References 22 publications

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“…This finding is consistent to results obtained for a pure culture of M. marburgensis [23]. During application of the cell-recycle system the MER inceased by 42 % compared to standard bioprocessing conditions [28].…”

Section: Discussionsupporting

confidence: 94%

“…The results of above presented studies also show that a fully acclimated hydrogenotrophic methanogenic enrichment culture can sustain overpressure conditions and is furthermore capable of microbiological biogas upgrading as well as of achieving high MERs [28], a finding, in controversy to discussions found elsewhere [30]. Eventually, during experiments applying a monoculture of hydrogenotrophic methanogens it has been shown, that an increase of the pressure inside the bioreactor will elevate the MER, which is a consequence of increasing the maximum solubility of gasses inside the liquid phase [23,24,30]. Hence, by applying overpressure an increase of the MER could be achieved, if a hydrogenotrophic and methanogenic enrichment culture would be utilized for ex situ microbiological biogas upgrading.…”

Section: Discussionmentioning

confidence: 84%

“…However, many publications on bioprocess development using hydrogenotrophic methanogens grown on pure H 2 /CO 2 are already available [9,[21][22][23]35], which could speed up bioprocess development of the microbiological biogas upgrading technology in respect to the utilization of mixed cultures of hydrogenotrophic methanogens. Regarding in situ microbiological biogas upgrading aforementioned queries concerning bioprocess development need to be overcome before even pilot plant scale could be implemented.…”

Section: Discussionmentioning

confidence: 99%

“…Methanation of H 2 and CO 2 for CH 4 production by using pure reactant gasses and microbial monocultures has already received much attention in the past decades, and, as reviewed elsewhere, the cultivation of hydrogenotrophic methanogens has been accomplished using different laboratory-scale bioreactor systems [9]. Quantitative bioprocess development, including scale-up of biomethanation, has only recently become a re-emerging focus [9,[21][22][23], despite its powerful volumetric CH 4 production rates being known for a long time [24].…”

Section: Introductionmentioning

confidence: 99%

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A Critical Assessment of Microbiological Biogas to Biomethane Upgrading Systems

Rittmann

2015

Advances in Biochemical Engineering/Biotechnology

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Microbiological biogas upgrading could become a promising technology for production of methane (CH(4)). This is, storage of irregular generated electricity results in a need to store electricity generated at peak times for use at non-peak times, which could be achieved in an intermediate step by electrolysis of water to molecular hydrogen (H(2)). Microbiological biogas upgrading can be performed by contacting carbon dioxide (CO(2)), H(2) and hydrogenotrophic methanogenic Archaea either in situ in an anaerobic digester, or ex situ in a separate bioreactor. In situ microbiological biogas upgrading is indicated to require thorough bioprocess development, because only low volumetric CH(4) production rates and low CH(4) fermentation offgas content have been achieved. Higher volumetric production rates are shown for the ex situ microbiological biogas upgrading compared to in situ microbiological biogas upgrading. However, the ex situ microbiological biogas upgrading currently suffers from H(2) gas liquid mass transfer limitation, which results in low volumetric CH(4) productivity compared to pure H(2)/CO(2) conversion to CH(4). If waste gas utilization from biological and industrial sources can be shown without reduction in volumetric CH(4) productivity, as well as if the aim of a single stage conversion to a CH(4) fermentation offgas content exceeding 95 vol% can be demonstrated, ex situ microbiological biogas upgrading with pure or enrichment cultures of methanogens could become a promising future technology for almost CO(2)-neutral biomethane production.

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Section: Discussionsupporting

confidence: 94%

Section: Discussionmentioning

confidence: 84%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Critical Assessment of Microbiological Biogas to Biomethane Upgrading Systems

Rittmann

2015

Advances in Biochemical Engineering/Biotechnology

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“…These results are in agreement with the experimental data reported in the work of Seifert et al [44] where an increase of pressure will have a high influence on methane concentration of gas but a little effect on MER, as discussed by Seifert et al [45]. Figure 7 shows that MER achieves a maximum value immediately after the pressure rise, due to the increased gas liquid mass transfer.…”

Section: Figsupporting

confidence: 82%

Study of Biological Sabatier Reaction With Fluid Dynamics Simulations

Leonzio¹

2016

IJRET

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Development of a simultaneous bioreactor system for characterization of gas production kinetics of methanogenic archaea at high pressure

Pappenreiter

Zwirtmayr

Mauerhofer³

et al. 2019

Engineering in Life Sciences

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Cultivation of methanogens under high pressure offers a great opportunity in biotechnological processes, one of which is the improvement of the gas‐liquid transfer of substrate gases into the medium broth. This article describes a newly developed simultaneous bioreactor system consisting of four identical cultivation vessels suitable for investigation of microbial activity at pressures up to 50 bar and temperatures up to 145°C. Initial pressure studies at 10 and 50 bar of the autotrophic and hydrogenotrophic methanogens Methanothermobacter marburgensis, Methanobacterium palustre, and Methanobacterium thermaggregans were performed to evaluate the reproducibility of the system as well as to test the productivity of these strains. The strains were compared with respect to gas conversion (%), methane evolution rate (MER) (mmol L‐1 h−1), turnover rate (h−1), and maximum conversion rate (kmin) (bar h−1). A pressure drop that can be explained by the reaction stoichiometry showed that all tested strains were active under pressurized conditions. Our study sheds light on the production kinetics of methanogenic strains under high‐pressure conditions. In addition, the simultaneous bioreactor system is a suitable first step screening system for analyzing the substrate uptake and/or production kinetics of gas conversion and/or gas production processes for barophilic or barotolerant microbes.

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Analysis of process related factors to increase volumetric productivity and quality of biomethane with Methanothermobacter marburgensis

Cited by 105 publications

References 22 publications

A Critical Assessment of Microbiological Biogas to Biomethane Upgrading Systems

A Critical Assessment of Microbiological Biogas to Biomethane Upgrading Systems

Study of Biological Sabatier Reaction With Fluid Dynamics Simulations

Development of a simultaneous bioreactor system for characterization of gas production kinetics of methanogenic archaea at high pressure

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