Denitrification as an N2O sink

Water Research, Год журнала: 2018, Номер 151, С. 381 - 387

Опубликована: Дек. 24, 2018

The strong greenhouse gas nitrous oxide (N2O) can be emitted from wastewater treatment systems as a byproduct of ammonium oxidation and the last intermediate in stepwise reduction nitrate to N2 by denitrifying organisms. A potential strategy reduce N2O emissions would enhance activity reductase (NOS) microbial community. survey existing literature on denitrification showed that reducing capacity (VmaxN2O→N2) exceeded produce (VmaxNO3→N2O) factor 2–10. This suggests an effective sink for N2O, potentially scavenging fraction produced or abiotic reactions. We conducted series incubation experiments with freshly sampled activated sludge system Oslo found ratio α = VmaxN2O→N2/VmaxNO3→N2O fluctuated between 2 5 samples taken at intervals over period weeks. Adding cocktail carbon substrates resulted increasing rates, but had no significant effect α. Based these results – complemented qPCR metaproteomic data we discuss whether overcapacity ascribed gene/protein abundance ratios (nosZ/nir), in-cell competition reductases electrons could greater importance.

Язык: Английский

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Simultaneous nitrification and denitrification without nitrite accumulation by a novel isolated Ochrobactrum anthropic LJ81

Bioresource Technology, Год журнала: 2018, Номер 272, С. 442 - 450

Опубликована: Окт. 26, 2018

Язык: Английский

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Biochar enhances plant growth and nutrient removal in horizontal subsurface flow constructed wetlands

The Science of The Total Environment, Год журнала: 2018, Номер 639, С. 67 - 74

Опубликована: Май 26, 2018

Язык: Английский

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Processes and Microorganisms Involved in the Marine Nitrogen Cycle: Knowledge and Gaps

Frontiers in Marine Science, Год журнала: 2019, Номер 6

Опубликована: Ноя. 29, 2019

Nitrogen (N) is a key element for life in the oceans. It controls primary productivity many parts of global ocean, consequently playing crucial role uptake atmospheric carbon dioxide. The marine N cycle driven by multiple biogeochemical transformations mediated microorganisms, including processes contributing to fixed pool (N2 fixation) and retained (nitrification, assimilation, dissimilatory nitrate reduction ammonia), as well loss (denitrification, anaerobic ammonium oxidation nitrite-dependent methane oxidation). maintains functioning ecosystems will be component how ocean responds environmental change. In this review, we summarize current understanding microbial cycle, functional genes involved, ecology distribution participating main impacts anthropogenic activities on cycle.

Язык: Английский

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Microbial Nitrogen Cycling in Estuaries: From Genes to Ecosystem Processes

Estuaries and Coasts, Год журнала: 2017, Номер 41(3), С. 626 - 660

Опубликована: Сен. 1, 2017

Язык: Английский

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