Denitrifying communities enriched with mixed nitrogen oxides preferentially reduce N2O under conditions of electron competition in wastewater

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 498, P. 155292 - 155292

Published: Aug. 30, 2024

The reduction rate of nitrous oxide (N2O) is affected by the electron competition among four denitrifying steps, limiting mitigation N2O emissions during wastewater treatment. We foresee essential to understand how combinations acceptors (EAs) affect microbial composition and mechanisms communities. enriched three communities from activated sludge biomass with equivalent loads different EAs: NO3– (R1), (R2), + (R3). resulting enrichments were compared in terms (1) nitrogen oxides absence/presence other EAs (NO3–, NO2–, N2O), (2) their denitrification gene (3) community composition. Batch results showed presence NO2– suppressed rates all reactors. effect was lower mixed-substrate feed than single-substrate under infinite retention time chemostat operation modes. N2O-reducers type nosZ II when serves as sole EA, whereas I more prone enrichment EA. EA rather mode differentiated genus Flavobacterium seems play a significant role alleviating suppression caused competition. Limited conditions supply are norm independently high C/N levels, co-enriched alleviates for electrons reductase enzyme or individually.

Language: Английский

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Optimizing carbon sources regulation in the biochemical treatment systems for coal chemical wastewater: Aromatic compounds biodegradation and microbial response strategies

Water Research, Journal Year: 2024, Volume and Issue: 256, P. 121627 - 121627

Published: April 17, 2024

Language: Английский

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Upgrade and reconstruction of biological processes in municipal wastewater treatment plants

Desalination and Water Treatment, Journal Year: 2024, Volume and Issue: 317, P. 100299 - 100299

Published: Jan. 1, 2024

Traditional activated-sludge treatment technologies, such as anaerobic/anoxic/aerobic processes, oxidation ditch and sequential batch reactors, play a crucial role in the removal of nitrogen phosphorus from municipal wastewater. The synergistic interactions among functional microorganisms, primarily nitrogen-removal organisms phosphorus-accumulating organisms, are paramount these processes. However, traditional activated sludge technology consumes large amounts energy produces substantial volume waste-activated sludge, necessitating upgrade wastewater plants (WWTPs) focusing on sustainable development goals. This review analyzes characterizes key microorganisms (Nitrosomonas, Nitrosospira, Nitrobacter, Nitrospira, Thauera, Pseudomonas, Candidatus Brocadia, Kuenenia, Accumulibacter) involved treatment. It also explores impact operating conditions, influent quality, reactor configurations regulation for efficient nutrient removal, with emphasis upgrading reconstructing techniques full-scale anaerobic ammonium (anammox) Integrated fixed-film sludge-based (IFAS), aerobic granular (AGS), moving bed biofilm (MBBR) technologies promising to enhance transform conventional realizing new engineering applications practices. Other developments use heterotrophic denitrifying bacteria Thauera anammox (Candidatus Brocadia Kuenenia) mainstream partial denitrification/anammox which potentially expandable WWTPs.

Language: Английский

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Integrating network and in-silico simulation insights into the ecological interactions shaped by carbon sources in partial denitrification and anammox system

Water Research, Journal Year: 2025, Volume and Issue: 276, P. 123246 - 123246

Published: Feb. 5, 2025

Language: Английский

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Mitigating nitrous oxide emissions from low carbon to nitrogen ratio wastewater treatment: Utilizing sugarcane bagasse fermentation liquid for constructed wetlands

Bioresource Technology, Journal Year: 2024, Volume and Issue: 406, P. 131088 - 131088

Published: July 7, 2024

Language: Английский

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Management strategy of granular sludge settleability in saline denitrification: Insights from machine learning

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 493, P. 152747 - 152747

Published: June 1, 2024

Language: Английский

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Response of wastewater treatment performance and bacterial community to original and aged polyvinyl chloride microplastics in sequencing batch reactors

Bioresource Technology, Journal Year: 2025, Volume and Issue: 419, P. 132044 - 132044

Published: Jan. 6, 2025

Language: Английский

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Simultaneous nitrogen removal and phosphorus recovery in granular sludge-based partial denitrification/anammox-hydroxyapatite precipitation (PD/A-HAP) process under low C/N ratio and dissolved oxygen limitation

Bioresource Technology, Journal Year: 2025, Volume and Issue: unknown, P. 132045 - 132045

Published: Jan. 1, 2025

Language: Английский

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Construction of high-efficiency denitrifying biofilms on hollow fiber membranes through the in situ production and supply of volatile fatty acids

Separation and Purification Technology, Journal Year: 2025, Volume and Issue: unknown, P. 131447 - 131447

Published: Jan. 1, 2025

Language: Английский

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Walnut shell-based composite fillers to enhance two-stage biological aerated filter for efficient nitrogen removal: carbon source slow-release properties, regulatory strategies and microbial response characteristics

Journal of environmental chemical engineering, Journal Year: 2025, Volume and Issue: 13(2), P. 115618 - 115618

Published: Jan. 31, 2025

Language: Английский

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