Chemo-autotrophic biogas purification for methane enrichment: mechanism and kinetics

Strevett, Keith A.; Vieth, Robert F.; Grasso, Domenic

doi:10.1016/0923-0467(95)06095-2

Cited by 66 publications

(37 citation statements)

References 13 publications

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“…Strevett et al [33] have used a chemo-autotrophic methanogen (Methanobacterium thermoautotrophicum), uncoupled methanogenesis techniques and hollow fi ber membranes, to convert carbon dioxide to methane, and effectively remove hydrogen sulfi de from biological off-gases. Gas phase methane concentration was found to increase from 60 to 96%.…”

Section: Introductionmentioning

confidence: 99%

Development of mixed inoculum for methane enriched biogas production

2010

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Inocula were collected from four different sources such as Jajmau tannery waste treatment plant (ITW), Jajmau municipal waste treatment (IMW), Unnao distillery (IDW) and a batch reactor, in which the sludge of a field scale biogas reactor was added to cow dung slurry to develop inoculum (IBS). A combination of these mixed inocula were used for biogas production at 35°C in laboratory scale reactor (10 L capacity) and the average yield of biogas (0.547 Lg(-1) volatile solid (VS)) and methane (0.323 Lg(-1)VS) in 41 d was higher in case of mixed inoculum IMW (1) (IMW+IBS), with maximum methane content in biogas (68% during 27-30 d), as compared to other mixed inocula as well as control i.e. ITW (1) (ITW+IBS), IDW(1) (IDW+IBS) and IBS. The corresponding yields of gas were biogas (0.505, 0.536 and 0.456 Lg(-1)VS), methane (0.288, 0.305, and 0.245 Lg(-1)VS) where as, the corresponding maximum methane content in biogas was 62% during 29-33d, 64% during 29-33 d and 62% during 27-29 d in ITW(1), IDW(1) and IBS.

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Section: Introductionmentioning

confidence: 99%

Development of mixed inoculum for methane enriched biogas production

2010

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“…Yet, ex situ microbiological biogas upgrading by contacting biogas, H 2 and pure culture of hydrogenotrophic methanogens did also not receive much attention in the scientific community [22,29,30]. In all three available publications concerning pure culture microbiological biogas upgrading only different thermophilic hydrogenotrophic methanogenic strains were used for bioprocessing.…”

Section: Discussionmentioning

confidence: 97%

“…The bioprocess operation modes used for examination of microbiological biogas upgrading were fed-batch [29] and chemostat culture [22,30]. Especially cultivation in chemostat culture mode allows structured bioprocess optimization and development, which is required in order to overcome the limitations arising during conversion of gas mixtures containing inert gas compounds [22].…”

Section: Discussionmentioning

confidence: 99%

“…During application of the hollow fibre membrane cassette inside the stirred tank bioreactor under orthogonal flow process mode the molar flux of H 2 -enriched biogas into the liquid phase was found to be higher compared to the application of hollow fibre module cassette in counter current flow mode outside of the bioreactor. Unfortunately, no volumetric production rates could be calculated from data presented [29]. The authors state that a MER as high as 10400 mmol CH 4 L −1 h −1 could be obtained (as calculated from MER of biogas production via microbiological biogas upgrading by a difference of 14 MJ m −3 ).…”

Section: Ex Situ Microbiological Biogas Upgrading In a Separatementioning

confidence: 95%

“…The bioreactor specification and configuration was unfortunately not provided in the study [29]. The experimental set-up was used to examine gas liquid mass transfer by application of two different hollow fibre membrane cassettes either operated in parallel counter current flow mode or in orthogonal flow mode for H 2 -enriched biogas addition to a suspension containing M. thermoautotrophicum.…”

Section: Ex Situ Microbiological Biogas Upgrading In a Separatementioning

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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