Enhanced Removal of Hydrophobic Short-Chain n-Alkanes from Gas Streams in Biotrickling Filters in Presence of Surfactant

Environmental Science & Technology, Journal Year: 2022, Volume and Issue: 56(14), P. 10349 - 10360

Published: June 24, 2022

Emissions of n-alkanes are facing increasingly stringent management challenges. Biotrickling filtration in the presence surfactants is a competitive alternative for enhanced removal n-alkanes. Herein, sodium dodecyl benzene sulfonate (SDBS) was added into liquid phase feeding biotrickling filter (BTF) to enhance various short-chain from n-hexane (C6) methane (C1). The performance C6–C1 and microbial response mechanisms were explored. results showed that efficiency (RE) decreased 77 ± 1.3 35 5.6% as carbon chain number C6 C1, under conditions an n-alkane inlet load 58 3.0 g/m3·h EBCT 30 s. significantly by introduction 15 mg/L SDBS, RE reached 99 0.7% C1 74 3.3%. strengthening apparent Henry's law coefficient 11 1.4–30 0.3%, cell surface hydrophobicity microorganisms improved 71 5.6 87 4.0% with existence SDBS. Moreover, SDBS promoted succession activity community. activities alkane hydroxylase alcohol dehydrogenase 5.8 5.9 times higher than those without concentration cytochrome P450 gene 2.2 times. Therefore, addition effective strategy makes BTF suitable waste gas streams.

Language: Английский

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Carbon cycle in the microbial ecosystems of biological soil crusts

Soil Biology and Biochemistry, Journal Year: 2022, Volume and Issue: 171, P. 108729 - 108729

Published: May 23, 2022

Language: Английский

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Molecular hydrogen in seawater supports growth of diverse marine bacteria

Nature Microbiology, Journal Year: 2023, Volume and Issue: 8(4), P. 581 - 595

Published: Feb. 6, 2023

Abstract Molecular hydrogen (H 2 ) is an abundant and readily accessible energy source in marine systems, but it remains unknown whether microbial communities consume this gas. Here we use a suite of approaches to show that bacteria H support growth. Genes for -uptake hydrogenases are prevalent global ocean metagenomes, highly expressed metatranscriptomes found across eight bacterial phyla. Capacity oxidation increases with depth decreases oxygen concentration, suggesting important environments low primary production. Biogeochemical measurements tropical, temperate subantarctic waters, axenic cultures microbes supplied at environmentally relevant concentrations, yielding enough cell-specific power growth requirements. Conversely, our results indicate carbon monoxide (CO) primarily supports survival. Altogether, notable may influence oceanic ecology biogeochemistry.

Language: Английский

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Arctic soil methane sink increases with drier conditions and higher ecosystem respiration

Nature Climate Change, Journal Year: 2023, Volume and Issue: 13(10), P. 1095 - 1104

Published: Aug. 31, 2023

Arctic wetlands are known methane (CH

Language: Английский

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Microbial gas fermentation technology for sustainable food protein production

Biotechnology Advances, Journal Year: 2023, Volume and Issue: 69, P. 108240 - 108240

Published: Aug. 28, 2023

Language: Английский

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Seasonal activities of the phyllosphere microbiome of perennial crops

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: Feb. 23, 2023

Abstract Understanding the interactions between plants and microorganisms can inform microbiome management to enhance crop productivity resilience stress. Here, we apply a genome-centric approach identify ecologically important leaf members on replicated plots of field-grown switchgrass miscanthus, quantify their activities over two growing seasons for switchgrass. We use metagenome metatranscriptome sequencing curate 40 medium- high-quality metagenome-assembled-genomes (MAGs). find that classes represented by these MAGs (Actinomycetia, Alpha- Gamma- Proteobacteria, Bacteroidota) are active in late season, upregulate transcripts short-chain dehydrogenase, molybdopterin oxidoreductase, polyketide cyclase. Stress-associated pathways expressed most MAGs, suggesting engagement with host environment. also detect seasonally activated biosynthetic terpenes various non-ribosomal peptide poorly annotated. Our findings support leaf-associated bacterial populations dynamic responsive cues.

Language: Английский

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The taxonomic and genomic attributes of oligotrophic soil bacteria

ISME Communications, Journal Year: 2024, Volume and Issue: 4(1)

Published: Jan. 1, 2024

Abstract Not all bacteria are fast growers. In soil as in other environments, exist along a continuum—from copiotrophs that can grow rapidly under resource-rich conditions to oligotrophs adapted life the “slow lane.” However, field of microbiology is built almost exclusively on study due, part, ease studying them vitro. To begin understanding attributes oligotrophs, we analyzed three independent datasets represent contrasts organic carbon availability. These included 185 samples collected from profiles across USA, 950 paired bulk and rhizosphere Europe, soils microcosm experiment where availability was manipulated directly. Using combination marker gene sequencing targeted genomic analyses, identified specific oligotrophic taxa were consistently more abundant carbon-limited environments (subsurface, bulk, unamended soils) compared corresponding carbon-rich environment (surface, rhizosphere, glucose-amended soils), including members Dormibacterota Chloroflexi phyla. general, putative had smaller genomes, slower maximum potential growth rates, under-represented culture collections. The genomes likely be enriched pathways allow metabolize range energy sources store carbon, while genes associated with energy-intensive functions like chemotaxis motility under-represented. few shared, highlighting use different metabolic strategies regulatory thrive resource-limited soils.

Language: Английский

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Chemical structure of hydrocarbons significantly affects removal performance and microbial responses in gas biotrickling filters

Bioresource Technology, Journal Year: 2024, Volume and Issue: 398, P. 130480 - 130480

Published: Feb. 21, 2024

Language: Английский

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Reanalysis of NOAA H₂ observations: implications for the H₂ budget

Atmospheric chemistry and physics, Journal Year: 2024, Volume and Issue: 24(7), P. 4217 - 4229

Published: April 9, 2024

Abstract. Hydrogen (H2) is a promising low-carbon alternative to fossil fuels for many applications. However, significant gaps in our understanding of the atmospheric H2 budget limit ability predict impacts greater usage. Here we use NOAA dry air mole fraction observations from samples collected ground-based and ship platforms during 2010–2019 evaluate representation GFDL-AM4.1 chemistry-climate model. We find that base model configuration captures observed interhemispheric gradient well but underestimates surface concentration by about 10 ppb. Additionally, fails reproduce 1–2 ppb yr−1 mean increase at background stations. show cause most likely an underestimation current anthropogenic emissions, including potential leakages H2-producing facilities. also changes soil moisture, temperature, snow cover have caused magnitude sink, important removal mechanism H2, especially Northern Hemisphere. there remains uncertainty due fundamental removal, such as minimum moisture required uptake, which performed extensive sensitivity analyses. Finally, meridional mixing ratio its seasonality can provide constraints test refine parameterizations sink.

Language: Английский

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Hydrogen-Oxidizing Bacteria Are Abundant in Desert Soils and Strongly Stimulated by Hydration

mSystems, Journal Year: 2020, Volume and Issue: 5(6)

Published: Nov. 16, 2020

How the diverse bacterial communities inhabiting desert soils maintain energy and carbon needs is much debated. Traditionally, most bacteria are thought to persist by using organic synthesized photoautotrophs following transient hydration events. Recent studies focused on Antarctic have revealed, however, that some use atmospheric trace gases, such as hydrogen (H

Language: Английский

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