2011
DOI: 10.1002/bit.24360
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Simultaneous hydrogen utilization and in situ biogas upgrading in an anaerobic reactor

Abstract: The possibility of converting hydrogen to methane and simultaneous upgrading of biogas was investigated in both batch tests and fully mixed biogas reactor, simultaneously fed with manure and hydrogen. Batch experiments showed that hydrogen could be converted to methane by hydrogenotrophic methanogenesis with conversion of more than 90% of the consumed hydrogen to methane. The hydrogen consumption rates were affected by both P(H₂) (hydrogen partial pressure) and mixing intensity. Inhibition of propionate and bu… Show more

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Cited by 245 publications
(131 citation statements)
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References 23 publications
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“…A control bioreactor of the same type was operated under the same conditions but without the addition of H 2 . The pH value was not controlled during the cultivation, which resulted in an increase of pH [25], due to stripping of CO 2 . As a consequence of higher pH the aceticlastic methanogens might have become negatively affected in volumetric CH 4 productivity.…”
Section: In Situ Microbiological Biogas Upgrading By Addition Of Hmentioning
confidence: 95%
See 1 more Smart Citation
“…A control bioreactor of the same type was operated under the same conditions but without the addition of H 2 . The pH value was not controlled during the cultivation, which resulted in an increase of pH [25], due to stripping of CO 2 . As a consequence of higher pH the aceticlastic methanogens might have become negatively affected in volumetric CH 4 productivity.…”
Section: In Situ Microbiological Biogas Upgrading By Addition Of Hmentioning
confidence: 95%
“…A 4.5 L continuously stirred tank reactor (CSTR) with 3.5 L working volume containing a thermophilic anaerobic mixed culture was operated at 55°C [25]. The H 2 gassing rate to the microbiological biogas upgrading bioreactor was 0.0005 volume gas per volume liquid per minute (vvm).…”
Section: In Situ Microbiological Biogas Upgrading By Addition Of Hmentioning
confidence: 99%
“…Although the methane production increases with H2 injection, biogas composed of 75 % CH4 was obtained in average using classical gas diffuser (e.g. ceramic diffuser) [4] due to the hydrogen remaining in the effluent gas (20 % H2). Thus, the H2 gas-liquid mass transfer is a limitation on this system.…”
Section: Direct Injection In the Digester (Alternative 1)mentioning
confidence: 99%
“…For instance, increase of pH (until 8-8.3) was observed in laboratory experiments at high H2 dissolved pressure [4]. The H2 injected in the digester reacts with bicarbonate (HCO3 -), a chemical compound known to buffer the pH.…”
Section: Direct Injection In the Digester (Alternative 1)mentioning
confidence: 99%
“…The main advantages of this technology are the low energy input and generation of renewable energy (biogas with 50-70% CH 4 and 30-50% CO 2 ) [1]. Over the past several decades, the research on anaerobic technology mainly focused on the improvement of organic removal efficiency.…”
Section: Introductionmentioning
confidence: 99%