MIL-88A(Fe) modified carriers induced iron autotrophic denitrification in intermittently-aerated MBBR for low C/N wastewater treatment

International Biodeterioration & Biodegradation, Год журнала: 2025, Номер 198, С. 106009 - 106009

Опубликована: Янв. 20, 2025

Язык: Английский

---

Evidence for Assimilatory Nitrate Reduction as a Previously Overlooked Pathway of Reactive Nitrogen Transformation in Estuarine Suspended Particulate Matter

Environmental Science & Technology, Год журнала: 2022, Номер 56(20), С. 14852 - 14866

Опубликована: Сен. 13, 2022

Suspended particulate matter (SPM) contributes to the loss of reactive nitrogen (Nr) in estuarine ecosystems. Although denitrification and anaerobic ammonium oxidation SPM compensate for current imbalance global (N) inputs sinks, it is largely unclear whether other pathways Nr transformation exist SPM. Here, we combined stable isotope measurements with metagenomics metatranscriptomics verify occurrence dissimilatory nitrate reduction (DNRA) Pearl River Estuary (PRE). Surprisingly, conventional functional genes DNRA (nirBD) were abundant highly expressed SPM, which was inconsistent a low potential rate. Through taxonomic comparative genomic analyses, demonstrated that nitrite reductase (NirBD) conjunction assimilatory (NasA) performed (ANR) diverse alpha- gamma-proteobacterial lineages identified as key active heterotrophic ANR bacteria. Moreover, predicted have relative higher than survey across PRE spanning 65 km. Collectively, this study characterizes previously overlooked pathway mediated by bacteria has important implications our understanding N cycling estuaries.

Язык: Английский

---

Nitrogen removal by heterotrophic nitrification-aerobic denitrification bacteria: A review

Desalination and Water Treatment, Год журнала: 2024, Номер 317, С. 100227 - 100227

Опубликована: Янв. 1, 2024

The rising urbanization and industrialization are increasing nitrogen pollution in water wastewaters, calling for advanced remediation treatments. Traditional biological treatments limited area efficiency. Therefore, heterotrophic nitrification-aerobic denitrification (HN-AD) a single reactor has drawn significant attention shown higher Here we review HN-AD bacteria with focus on bacterial species, metabolism, factors influencing denitrification. Nitrogen metabolism pathway includes nitrate-nitrite reduction denitrification, hydroxylamine assimilatory Factors comprise carbon source, C/N, temperature, pH, DO so on. Compared to published literature reviews HN-AD, our manuscript comprehensively summary the latest research its remove mechanisms related enzymes first time.

Язык: Английский

---

Shallow groundwater fluctuation: An ignored soil N loss pathway from cropland

The Science of The Total Environment, Год журнала: 2022, Номер 828, С. 154554 - 154554

Опубликована: Март 14, 2022

Язык: Английский

---

Enhancement strategies of aerobic denitrification for efficient nitrogen removal from low carbon-to-nitrogen ratio shale oil wastewater

Bioresource Technology, Год журнала: 2023, Номер 387, С. 129663 - 129663

Опубликована: Авг. 12, 2023

Язык: Английский

---

Nitrogen removal in freshwater sediments of riparian zone: N-loss pathways and environmental controls

Frontiers in Microbiology, Год журнала: 2023, Номер 14

Опубликована: Авг. 17, 2023

The riparian zone is an important location of nitrogen removal in the terrestrial and aquatic ecosystems. Many studies have focused on efficiency one or two processes zone, less attention has been paid to interaction different transformation impact situ environmental conditions. molecular biotechnology, microcosm culture experiments 15N stable isotope tracing techniques were used this research at Weinan section Wei River, reveal mechanism with multi-layer lithologic structure. results showed that rate was 4.14-35.19 μmol·N·kg-1·h-1. Denitrification, dissimilatory reduction ammonium (DNRA) anaerobic oxidation (anammox) jointly achieved natural attenuation process denitrification dominant (accounting for 59.6%). High dissolved organic nitrate ratio (DOC:NO3-) would promote denitrification, but when NO3- content than 0.06 mg/kg, DNRA occur preference denitrification. Furthermore, abundances functional genes (norB, nirS, nrfA) anammox bacterial 16S rRNA gene similar distribution patterns corresponding rates. Sedimentary NOX-, Fe(II), carbon (DOC) microbial abundance main factors affecting zone. Fe (II) promoted through dependent ferrous under mediation, DOC promotes enhancing effect. study can be management prevention control global pollution.

Язык: Английский

---

Enhanced nitrogen removal in immersed rotating self-aerated biofilm reactor: Nitrogen removal pathway and microbial mechanism

Bioresource Technology, Год журнала: 2023, Номер 385, С. 129426 - 129426

Опубликована: Июнь 29, 2023

Язык: Английский

---

Insights into the nitrogen transformation mechanism of Pseudomonas sp. Y15 capable of heterotrophic nitrification and aerobic denitrification

Environmental Research, Год журнала: 2023, Номер 240, С. 117595 - 117595

Опубликована: Ноя. 4, 2023

Язык: Английский

---

Achieving simultaneous nitrification and endogenous denitrifying phosphorus removal in anaerobic/intermittently-aerated moving bed biofilm reactor for low carbon-to-nitrogen ratio wastewater treatment

Bioresource Technology, Год журнала: 2023, Номер 394, С. 130178 - 130178

Опубликована: Дек. 9, 2023

Язык: Английский

---

Identification of key microbial communities and intracellular metabolic pathways to response micro-aerobic environment for enhancing degradation of N, N-dimethylformamide in refractory membrane-making wastewater

Chemical Engineering Journal, Год журнала: 2023, Номер 480, С. 148179 - 148179

Опубликована: Дек. 20, 2023

Язык: Английский

---