A mixed consortium of methanotrophic archaea and bacteria boosts methane-dependent selenate reduction

Shi, Ling-Dong; Lv, Pan-Long; Wang, Min; Lai, Chun-Yu; Zhao, He-Ping

doi:10.1016/j.scitotenv.2020.139310

Cited by 23 publications

(14 citation statements)

References 63 publications

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“…More recently, a microbial consortium capable of methane-dependent selenate reduction was enriched in a membrane biofilm batch reactor. Metagenomic analysis revealed that the consortium was mainly composed of methanotrophic archaeons belonging to the genus Methanosarcina and type II methanotrophic bacteria belonging to the genus Methylocystis, which carried out selenate reduction along with methane oxidation (Shi et al, 2020). This agrees with recent insights into methane-metabolizing archaeons that either produce or consume methane (Evans et al, 2019).…”

Section: Biotransformation Of Selenium Oxyanions By Archaeasupporting

confidence: 86%

“…Different organic substrates can serve as electron donors in the respiratory conversion of selenate to Se 0 (Narasingarao & Häggblom, 2007a;. Both H 2 and methane can drive the reduction of selenate under anaerobic conditions (Haroon et al, 2013;Orphan et al, 2001;Shi et al, 2020;. Gammaproteobacteria isolated via enrichment cultures from sediments of Arthur Kill and the Kesterson Reservoir (San Joaquin Valley, California, USA) were also found to be capable of selenate respiration while using aromatic compounds such as benzoate, 3-hydroxybenzoate or 4-hydroxybenzoate as a carbon source (Knight et al, 2002).…”

Section: Environmental Technologies To Treat Selenium Pollutionmentioning

confidence: 99%

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Microbial reduction of selenium oxyanions: energy-yielding and detoxification reactions

Lampis¹,

Vallini²

2021

Environmental Technologies to Treat Selenium Pollution

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Selenium (Se), a semi-metallic chemical element in the oxygen group (group 16 [VIa]) of the periodic table, can be beneficialeven essential in some instancesfor microbes and animals, including humans, when present at a suitable concentration, whereas no essential Se requirement has been shown for higher plants (Lenz & Lens, 2009;Winkel et al., 2015). Se is an essential trace element required for the biosynthesis of seleno-amino acids such as selenocysteine (Se-Cys) (Bock et al., 1991;Gromer et al., 2005) and selenomethionine (Se-Met, the major dietary form) (Schrauzer, 2000). These are potent antioxidants as well as a source of Se for the synthesis of Se-dependent antioxidant and repair proteins such as glutathione peroxidases, thioredoxin reductases, and methionine sulfoxide reductases (

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Section: Biotransformation Of Selenium Oxyanions By Archaeasupporting

confidence: 86%

Section: Environmental Technologies To Treat Selenium Pollutionmentioning

confidence: 99%

Microbial reduction of selenium oxyanions: energy-yielding and detoxification reactions

Lampis¹,

Vallini²

2021

Environmental Technologies to Treat Selenium Pollution

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“…These examples demonstrate with specific evidence the broad versatility of Methanoperedens archaea; however, other studies report AOM with alternative electron acceptors with inconclusive results. Hexavalent chromium (Lu et al, 2016), selenate (Luo et al, 2018;Shi et al, 2020), and bromate (Luo et al, 2017), have been suggested to mediate AOM in cultures containing N-dAOM microorganisms; however, the enrichment and reported activity of side populations of Geobacter or canonical aerobic methanotrophs, make the involvement of N-dAOM microorganisms, debatable.…”

Section: Laboratory Enrichmentsmentioning

confidence: 99%

Methanotrophs: Discoveries, Environmental Relevance, and a Perspective on Current and Future Applications

et al. 2021

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Methane is the final product of the anaerobic decomposition of organic matter. The conversion of organic matter to methane (methanogenesis) as a mechanism for energy conservation is exclusively attributed to the archaeal domain. Methane is oxidized by methanotrophic microorganisms using oxygen or alternative terminal electron acceptors. Aerobic methanotrophic bacteria belong to the phyla Proteobacteria and Verrucomicrobia, while anaerobic methane oxidation is also mediated by more recently discovered anaerobic methanotrophs with representatives in both the bacteria and the archaea domains. The anaerobic oxidation of methane is coupled to the reduction of nitrate, nitrite, iron, manganese, sulfate, and organic electron acceptors (e.g., humic substances) as terminal electron acceptors. This review highlights the relevance of methanotrophy in natural and anthropogenically influenced ecosystems, emphasizing the environmental conditions, distribution, function, co-existence, interactions, and the availability of electron acceptors that likely play a key role in regulating their function. A systematic overview of key aspects of ecology, physiology, metabolism, and genomics is crucial to understand the contribution of methanotrophs in the mitigation of methane efflux to the atmosphere. We give significance to the processes under microaerophilic and anaerobic conditions for both aerobic and anaerobic methane oxidizers. In the context of anthropogenically influenced ecosystems, we emphasize the current and potential future applications of methanotrophs from two different angles, namely methane mitigation in wastewater treatment through the application of anaerobic methanotrophs, and the biotechnological applications of aerobic methanotrophs in resource recovery from methane waste streams. Finally, we identify knowledge gaps that may lead to opportunities to harness further the biotechnological benefits of methanotrophs in methane mitigation and for the production of valuable bioproducts enabling a bio-based and circular economy.

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“…MBRs overcome diffusional limitations by promoting high masstransfer rates of sparingly soluble gaseous substrates to the biomass. MBRs have been reported for denitrification (Lee et al, 2019) and removal of perchlorate (Wu et al, 2019), chromate (Luo et al, 2019), vanadate (Wang et al, 2019), selenate (Shi et al, 2020), etc. from contaminated wastewater and groundwater using methanotrophs.…”

Section: Mass Transfer and Solubility Limitations In Methanotroph Basmentioning

confidence: 99%

Biotransformation of Methane and Carbon Dioxide Into High-Value Products by Methanotrophs: Current State of Art and Future Prospects

2021

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Conventional chemical methods to transform methane and carbon dioxide into useful chemicals are plagued by the requirement for extreme operating conditions and expensive catalysts. Exploitation of microorganisms as biocatalysts is an attractive alternative to sequester these C1 compounds and convert them into value-added chemicals through their inherent metabolic pathways. Microbial biocatalysts are advantageous over chemical processes as they require mild-operating conditions and do not release any toxic by-products. Methanotrophs are potential cell-factories for synthesizing a wide range of high-value products via utilizing methane as the sole source of carbon and energy, and hence, serve as excellent candidate for methane sequestration. Besides, methanotrophs are capable of capturing carbon dioxide and enzymatically hydrogenating it into methanol, and hence qualify to be suitable candidates for carbon dioxide sequestration. However, large-scale production of value-added products from methanotrophs still presents an overwhelming challenge, due to gas-liquid mass transfer limitations, low solubility of gases in liquid medium and low titer of products. This requires design and engineering of efficient reactors for scale-up of the process. The present review offers an overview of the metabolic architecture of methanotrophs and the range of product portfolio they can offer. Special emphasis is given on methanol biosynthesis as a potential biofuel molecule, through utilization of methane and alternate pathway of carbon dioxide sequestration. In view of the gas-liquid mass transfer and low solubility of gases, the key rate-limiting step in gas fermentation, emphasis is given toward reactor design consideration essential to achieve better process performance.

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A mixed consortium of methanotrophic archaea and bacteria boosts methane-dependent selenate reduction

Cited by 23 publications

References 63 publications

Microbial reduction of selenium oxyanions: energy-yielding and detoxification reactions

Microbial reduction of selenium oxyanions: energy-yielding and detoxification reactions

Methanotrophs: Discoveries, Environmental Relevance, and a Perspective on Current and Future Applications

Biotransformation of Methane and Carbon Dioxide Into High-Value Products by Methanotrophs: Current State of Art and Future Prospects

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