Iron-carbon micro-electrolysis facilitates autotrophic denitrification and Feammox in tidal flow constructed wetlands for enhanced nitrogen removal and reduced N2O emissions

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 486, P. 150367 - 150367

Published: March 12, 2024

Language: Английский

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Dissimilatory nitrate reduction to ammonium has a competitive advantage over denitrification under nitrate-limited conditions

Reviews in Environmental Science and Bio/Technology, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 30, 2025

Language: Английский

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Dissimilatory nitrate reduction to ammonium (DNRA): A unique biogeochemical cycle to improve nitrogen (N) use efficiency and reduce N-loss in rice paddy

Rhizosphere, Journal Year: 2024, Volume and Issue: 30, P. 100875 - 100875

Published: March 22, 2024

Language: Английский

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Key enzymes, functional genes, and metabolic pathways of the nitrogen removal-related microorganisms

Critical Reviews in Environmental Science and Technology, Journal Year: 2024, Volume and Issue: 54(23), P. 1672 - 1691

Published: May 16, 2024

Biological nitrogen removal is a classic technique for removing from wastewater that has been studied extensively and gives high rate, energy efficiency, relatively environmentally benign. Using biological processes to treat the diverse components of requires thorough understanding microorganisms pathways involved. However, information regarding participating in remains limited. This review presents current knowledge researches into these microorganisms, including ammonia oxidizing bacteria, archaea, complete oxidation nitrite-oxidizing anaerobic ammonium denitrifying heterotrophic nitrification-aerobic denitrification bacteria. The metabolic enzymatic reactions involved cycle abovementioned are demonstrated. key enzymes, functional genes, removal-related were discussed. Additionally, advantages different oxidation, denitrifying, HN-AD described. Finally, limitations strategies unraveling presented. aim improve our principle advanced allow possible improvements treatment be identified.

Language: Английский

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A critical review of comammox and synergistic nitrogen removal coupling anammox: Mechanisms and regulatory strategies

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 948, P. 174855 - 174855

Published: July 20, 2024

Language: Английский

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Heterotrophic nitrification-aerobic denitrification (HNAD) in marine aquaculture wastewater treatment: Nitrogen removal performance, mechanism and microbial community characteristics

Journal of Water Process Engineering, Journal Year: 2025, Volume and Issue: 70, P. 107006 - 107006

Published: Jan. 14, 2025

Language: Английский

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Ferrihydrite regulated nitrogen metabolic pathway at biocathode of bioelectrochemical system – Insight into biofilm formation and bacterial composition

Bioresource Technology, Journal Year: 2025, Volume and Issue: unknown, P. 132275 - 132275

Published: Feb. 1, 2025

Language: Английский

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Narg, Rather than Napa, Mediates Nitrate Reduction in Pseudomonas Putida Y-9 Under Aerobic Conditions

Published: Jan. 1, 2025

The roles of napA and narG genes encoding nitrate reductase in the nitrogen cycle remain unclear. In this study, we constructed napA- narG-knockout mutants complementary strains compared their transformation characteristics with those wild-type strain Pseudomonas putida Y-9, which can simultaneously perform assimilation (ANRA), dissimilatory reduction to ammonium (DNRA), denitrification under aerobic conditions. deletion did not affect removal (NO3-) by P. efficiency mutant (88.59%) was comparable that (87.48%). However, severely inhibited growth NO3- Y-9. A 15N isotope experiment demonstrated controls DNRA ANRA pathways Knocking out significantly nitrite (NO2-) NO2- narG-deficient (82.30 83.81%, respectively) lower than (97.00%). Although these two completely removed (NH4+), less NH4+ converted into gaseous (11.96 13.98%, via oxidation (22.89%). Meanwhile, glnA, regulates assimilation, upregulated. Our results clarified narG, rather napA, mediates ANRA, DNRA, Y-9 Furthermore, both conversion NH4+.

Language: Английский

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Recent advances in the nitrogen cycle involving actinomycetes: Current situation, prospect and challenge

Bioresource Technology, Journal Year: 2025, Volume and Issue: unknown, P. 132100 - 132100

Published: Jan. 1, 2025

Language: Английский

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Investigation of Nitrogen Conversion Efficiency in Hydrogen-based Autotrophic Nitrate Reduction Reactor

Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 10, 2025

This study investigates the performance of a hydrogen-based membrane biofilm reactor (MBfR) for nitrogen transformation over an extended operational period exceeding 200 days. During monitoring, sustained highly alkaline conditions with pH consistently 11.20, while achieving ammonia conversion efficiency above 60% and maintaining nitrite accumulation rate below 1%. Integrated mass balance calculations microbial community profiling revealed coexistence denitrification dissimilatory nitrate reduction to ammonium (DNRA) pathways within network. A factorial experimental design was implemented hydraulic retention time (HRT) influent concentration as independent variables, generating nine distinct regimes through cross-variable permutations. Subsequent analysis extensive datasets enabled development Response Surface Methodology (RSM) model simulate dynamics. Model validation confirmed statistical reliability predictive accuracy RSM framework. Critical demonstrated that in hydrogen autotrophic system exhibited significant correlation individual variables themselves but showed negligible dependence on their interactive effects. These findings provide novel insights into process optimization strategies theoretical understanding convention.

Language: Английский

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