Oxidation of methane by Methylomicrobium album and Methylocystis sp. in the presence of H2S and NH3

Cáceres, Manuel; Gentina, Juan Carlos; Aroca, Germán

doi:10.1007/s10529-013-1339-7

Cited by 32 publications

(15 citation statements)

References 21 publications

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“…Here, lower methanol production might be associated with increasing inhibitory gases H 2 S and NH 3 present in the raw biogas. The maximum methanol production from synthetic gas mixture of CH 4 and CO 2 (4:1) is about 6-fold higher than 0.71 mM previously reported for CH 4 and CO 2 trichosporium IMV 3011 did not produce methanol from pure CH 4 (30%) under similar conditions.…”

Section: Mixture Of Ch 4 and Cocontrasting

confidence: 50%

Improvement in methanol production by regulating the composition of synthetic gas mixture and raw biogas

Patel

Mardina

Kim

et al. 2016

Bioresource Technology

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Section: Mixture Of Ch 4 and Cocontrasting

confidence: 50%

Improvement in methanol production by regulating the composition of synthetic gas mixture and raw biogas

Patel

Mardina

Kim

et al. 2016

Bioresource Technology

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“…This earlier study indicated that the decrease in pH from 4.72 to 3.8 was detrimental to these microorganisms, whereas a pH drop to 4.72 did not appear to suppress this group of methanotrophs. This finding is supported by other research (Cáceres et al, 2014), where higher H 2 S (0.05% v/v)concentrations suppressed the growth of Methylobacter and Methylocystis methanotrophs. However, the process of acidification will be slower in a typical New Zealand dairy effluent pond due to its lower organic content.…”

Section: Discussionsupporting

confidence: 88%

Assessing the Performance of Floating Biofilters for Oxidation of Methane from Dairy Effluent Ponds

et al. 2017

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Mitigating methane (CH) emissions from New Zealand dairy effluent ponds using volcanic pumice soil biofilters has been found to be a promising technology. Because the soil column biofilter prototype previously used was cumbersome, here we assess the effectiveness of volcanic pumice soil-perlite biofilter media in a floating system to remove high concentrations of CH emitted from a dairy effluent pond and simultaneously in a laboratory setting. We measured the CH removal over a period of 11 mo and determined methanotroph population dynamics using molecular techniques to understand the role of methanotroph population abundance and diversity in CH removal. Irrespective of the season, the pond-floating biofilters removed 66.7 ± 5.7% CH throughout the study period and removed up to 101.5 g CH m h. By contrast, the laboratory-based floating biofilters experienced more biological disturbances, with both low (∼34%) and high (∼99%) CH removal phases during the study period and an average of 58% of the CH oxidized. These disturbances could be attributed to the measured lower abundance of type II methanotroph population compared with the pond biofilters. Despite the acidity of the pond biofilters increasing significantly by the end of the study period, the biofilter encouraged the growth of both type I ( and ) and type II ( and ) methanotrophs. This study demonstrated the potential of the floating biofilters to mitigate dairy effluent ponds emissions efficiently and indicated methanotroph abundance as a key factor controlling CH oxidation in the biofilter.

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“…Lack of methanol accumulation during all growth experiments also suggested that MDH activity was not inhibited by the CO2 present in the biogas. Additionally, the H2S content of the biogas was less than 50 ppm, which was much lower 277 than the levels inhibitory to methanotrophs (>100 ppm) (Cáceres et al, 2014). Overall, biogas 278 from a commercial scale AD system is a suitable growth substrate for strain 14B.…”

Section: Comparison Of Growth On Different Methane Sourcesmentioning

confidence: 93%

Biological conversion of biogas to methanol using methanotrophs isolated from solid-state anaerobic digestate

Sheets

et al. 2016

Bioresource Technology

111

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The aim of this work was to isolate methanotrophs (methane oxidizing bacteria) that can directly convert biogas produced at a commercial anaerobic digestion (AD) facility to methanol. A methanotrophic bacterium was isolated from solid-state anaerobic digestate. The isolate had characteristics comparable to obligate methanotrophs from the genus Methylocaldum. This newly isolated methanotroph grew on biogas or purified CH4 and successfully converted biogas from AD to methanol. Methanol production was achieved using several methanol dehydrogenase (MDH) inhibitors and formate as an electron donor. The isolate also produced methanol using phosphate with no electron donor or using formate with no MDH inhibitor. The maximum methanol concentration (0.43±0.00gL(-1)) and 48-h CH4 to methanol conversion (25.5±1.1%) were achieved using biogas as substrate and a growth medium containing 50mM phosphate and 80mM formate.

show abstract

Oxidation of methane by Methylomicrobium album and Methylocystis sp. in the presence of H2S and NH3

Cited by 32 publications

References 21 publications

Improvement in methanol production by regulating the composition of synthetic gas mixture and raw biogas

Improvement in methanol production by regulating the composition of synthetic gas mixture and raw biogas

Assessing the Performance of Floating Biofilters for Oxidation of Methane from Dairy Effluent Ponds

Biological conversion of biogas to methanol using methanotrophs isolated from solid-state anaerobic digestate

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