Heterotrophic nitrification – An eternal mystery in the nitrogen cycle

Soil Biology and Biochemistry, Journal Year: 2022, Volume and Issue: 168, P. 108611 - 108611

Published: March 15, 2022

Despite the fact that heterotrophic nitrification was identified more than 100 years ago, biochemistry of nitrifiers is poorly known and their contribution to in soil still speculative. Heterotrophic need organic compounds as energy source contrast chemolithotrophic nitrifiers. Most potential pathways for nitrite/nitrate production by heterotrophs can be considered secondary metabolism. Only simultaneous denitrification some bacteria have connection Evidently, fungi differ. Some oxidizing ammonia monooxygenase (AMO), but there are also without AMO. The structure AMO oxidizers differs. has not been found nitrifying fungi. conditions highly differ from those waste waters where activity high. limited low availability easily decomposable substrates. Possible rhizosphere endophytic root microbes gaining a good supply substrates plants known. Fungi special interest because evidently nitrify only when decomposing recalcitrant (like lignin) which abundant soil. Nitrite/nitrate nitrogenous compounds, such amino acids, common among general conclusion use solely an "organic pathway" is, however, valid oxidized. Owing diverse, methodological difficulties differentiate soil, role nitrogen cycle remains uncertain.

Language: Английский

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Ecological interactions and the underlying mechanism of anammox and denitrification across the anammox enrichment with eutrophic lake sediments

Microbiome, Journal Year: 2023, Volume and Issue: 11(1)

Published: April 20, 2023

Abstract Background Increasing attention has recently been devoted to the anaerobic ammonium oxidation (anammox) in eutrophic lakes due its potential key functions nitrogen (N) removal for eutrophication control. However, successful enrichment of anammox bacteria from lake sediments is still challenging, partly ecological interactions between and denitrifying across such with remain unclear. Results This study thus designed fill knowledge gaps using bioreactors enrich more than 365 days. We continuously monitored influent effluent water, measured denitrification efficiencies, quantified bacteria, as well related N cycling genes. found that maximum efficiencies NH 4 + NO 2 − reached up 85.92% 95.34%, respectively. Accordingly, diversity decreased significantly enrichment, relative dominant (e.g., Candidatus Jettenia) Thauera, Afipia ) shifted considerably. The cooperation tended increase microbial community stability, indicating a coupling bacteria. Moreover, nirS -type denitrifiers showed stronger nirK during enrichment. Functional potentials depicted by metagenome sequencing confirmed denitrification. Metagenome-assembled genomes-based model indicated most could provide various materials amino acid, cofactors, vitamin Cross-feeding highlights importance increasing lakes. Conclusions greatly expands our understanding mechanisms among sediments, which sheds new insights into controlling eutrophication.

Language: Английский

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Reducing nitrogen loss during kitchen waste composting using a bioaugmented mechanical process with low pH and enhanced ammonia assimilation

Bioresource Technology, Journal Year: 2023, Volume and Issue: 372, P. 128664 - 128664

Published: Jan. 23, 2023

Language: Английский

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Overlooked pathways of endogenous simultaneous nitrification and denitrification in anaerobic/aerobic/anoxic sequencing batch reactors with organic supplementation

Water Research, Journal Year: 2022, Volume and Issue: 230, P. 119493 - 119493

Published: Dec. 15, 2022

Language: Английский

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High-temperature biofilm system based on heterotrophic nitrification and aerobic denitrification treating high-strength ammonia wastewater: Nitrogen removal performances and temperature-regulated metabolic pathways

Bioresource Technology, Journal Year: 2021, Volume and Issue: 344, P. 126184 - 126184

Published: Oct. 25, 2021

Language: Английский

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Treatment of DEHP-rich PVC waste in subcritical urine wastewater: Efficient dechlorination, denitrification, plasticizer decomposition, and preparation of high-purity phthalic acid crystals

Journal of Hazardous Materials, Journal Year: 2022, Volume and Issue: 441, P. 129820 - 129820

Published: Aug. 24, 2022

Language: Английский

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An overlooked influence of reactive oxygen species on ammonia-oxidizing microbial communities in redox-fluctuating aquifers

Water Research, Journal Year: 2023, Volume and Issue: 233, P. 119734 - 119734

Published: Feb. 12, 2023

Language: Английский

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Nitrogen cycling process and application in different prawn culture modes

Reviews in Aquaculture, Journal Year: 2024, Volume and Issue: 16(4), P. 1580 - 1602

Published: April 9, 2024

Abstract Nitrogenous waste is a global concern in aquatic ecosystems. In the shrimp farming system, feeding main input of nitrogen, which leads to accumulation nitrogenous waste, such as ammonia, nitrite, and nitrate. Nitrogen cycling crucial for removal stability aquaculture system. Under action different functional microorganisms, variety nitrogen pathways can be used transformation waste. Understanding complexity cycle necessary improving environment. This review examines many components mechanisms involved including nitrification, denitrification, anammox, heterotrophic assimilation, autotrophic assimilation. Because difference characteristics, culture modes are diverse. The current application outdoor pond mode indoor industrialized mode, was presented combination with requirements dissolved oxygen (DO), organic matter, carbon–nitrogen ratio, light, other environmental factors. Overall, denitrification processes According characteristics utilizing enhance efficiency cycle, facilitate elimination optimize water environment, improve overall benefits.

Language: Английский

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

International Biodeterioration & Biodegradation, Journal Year: 2025, Volume and Issue: 198, P. 106009 - 106009

Published: Jan. 20, 2025

Language: Английский

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Screening, identification, and application of anaerobic ammonia oxidizing bacteria in activated sludge systems: A comprehensive review

Journal of Environmental Management, Journal Year: 2025, Volume and Issue: 375, P. 124272 - 124272

Published: Jan. 27, 2025

Language: Английский

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