Integrating membrane aerated biofilm reactors with biological nitrogen removal processes: A new paradigm for achieving sustainable wastewater treatment plants

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 475, P. 146025 - 146025

Published: Sept. 18, 2023

Language: Английский

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Fe0-induced multifunctional effect of aerobic denitrification, autotrophic denitrification and chemically enhanced phosphorus removal in oxic/anoxic process for low C/N wastewater

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 483, P. 149218 - 149218

Published: Feb. 2, 2024

Language: Английский

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Challenges in achieving partial nitrification: Simultaneous nitrification-denitrification as the dominant pathway in municipal wastewater treatment

Journal of environmental chemical engineering, Journal Year: 2025, Volume and Issue: unknown, P. 115839 - 115839

Published: Feb. 1, 2025

Language: Английский

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Effects of Cd(II) on nitrogen removal by a heterotrophic nitrification aerobic denitrification bacterium Pseudomonas sp. XF-4

Ecotoxicology and Environmental Safety, Journal Year: 2024, Volume and Issue: 280, P. 116588 - 116588

Published: June 14, 2024

Simultaneous heterotrophic nitrification and aerobic denitrification (SND) is gaining tremendous attention due to its high efficiency low cost in water treatment. However, SND on an industrial scale still immature since effects of coexisting pollutants, for example, heavy metals, nitrogen removal remains largely unresolved. In this study, a HNAD bacterium (Pseudomonas sp. XF-4) was isolated. It could almost completely remove ammonium nitrate at pH 5–9 temperature 20 ℃-35 ℃ within 10 h, also showed excellently simultaneous under the coexistence any two inorganic sources with no intermediate accumulation. XF-4 rapidly grow again after vanish when nitrite or existed. There significant Cd(II) lower than mg/L, 95 % removed by XF-4. electron carrier transport system activity inhibited, especially concentration Cd(II). Overall, study reported novel strain capable coupled efficiently. The results provided new insights into treatment groundwater wastewater contaminated metals nitrogen.

Language: Английский

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Highly efficient low-temperature biodegradation of nitrogenous pollutions in domestic wastewater via immobilized-microbial bioaugmentation coupled with hybrid membrane bioreactor

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 485, P. 149705 - 149705

Published: Feb. 24, 2024

Language: Английский

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Detection and Treatment of Emerging Contaminants in Wastewater

IWA Publishing eBooks, Journal Year: 2024, Volume and Issue: unknown

Published: April 12, 2024

Abstract Detection and Treatment of Emerging Contaminants in Wastewater addresses the critical pressing need for effective strategies to detect treat emerging contaminants, thereby mitigating risks associated with their presence wastewater. This comprehensive book features contributions from prominent experts field wastewater, providing an up-to-date in-depth collection chapters dedicated tackling this issue. Highlights: The serves as invaluable resource identifying, assessing, comprehensively addressing contaminants wastewater and/or sludges. It delves into assessment, mitigation, treatment various including microplastics, antibiotic-resistant genes, pharmaceuticals, personal care products industrial chemicals.An exploration behavior microplastics different plants accumulation sludge, shedding light on potential impact environment.An introduction key mechanisms removal pollutants sludge through fungal-mediated processes, offering innovative solutions treatment.An investigation fate pharmaceutically-active compounds along environmental impacts. Additionally, accurate quantification procedures these are discussed.The covers new trends development greener nanomaterials, evaluating performance abating With its insights diverse perspectives, is essential guide researchers, professionals, policymakers engaged management protection. practical scientific knowledge presented herein will contribute significantly safeguarding our water resources ensuring a cleaner healthier future. ISBN: 9781789063745 (paperback) 9781789063752 (ebook) (ePub)

Language: Английский

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Enhancing simultaneous nitrification and denitrification in a plant-scale integrated fixed-film activated sludge system: Focusing on the cooperation between activated sludge and biofilm

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 496, P. 154322 - 154322

Published: July 27, 2024

Language: Английский

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Unraveling nitrogen removal performance during increasing loading rates in simultaneous nitrification and autotrophic denitrification: A functional and ecological analysis approach

The Science of The Total Environment, Journal Year: 2025, Volume and Issue: 959, P. 178322 - 178322

Published: Jan. 1, 2025

Language: Английский

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Gradient Dissolved Oxygen Created by Limited Aeration Triggers Ammonia Assimilation: Insight into Efficient Nitrogen Removal with Nutrient Harvest

Published: Jan. 1, 2025

Currently, the mainstream ammonia nitrogen (NH4+-N) removal underwent transformation of intermediate nitrogen, which necessitated an intricate assembly multiple biochemical units with varying dissolved oxygen (DO) settings, even causing greenhouse effect. Ammonia assimilation could directly convert nutrient into cell components via microbial capture. However, induction mechanism remained unclear. Herein, we constructed biological system induced by synergy limited aeration and external carbon source. Total (TN) NH4+-N in both batch continuous flow reactors improved stepwise influent to (C/N) ratio. Under C/N ratio 7.8-8.1 reactor, efficiencies TN, total phosphorus achieved 88.63%, 92.28% 100%, respectively. Combined kinetics, simultaneous trends source consumption confirmed occurrence assimilation. DO gradient formed significantly suppressed nitrobacteria, while further facilitated The production α-ketoglutaric acid, extra- intra-cellular proteins verified conversion towards organic nitrogen. Nitrogen balance showcased that TN efficiency 79.60% under 7.8-8.1, accompanied 80.82% External was conducive enriching dominant bacteria related during aeration. functional genes (gdhA, glnA gltB) encoding also increased abundance. had a potential for non-redox sludge resource utilization through harvest.

Language: Английский

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Effects of Intracellular and Extracellular Substances of Chlorella Pyrenoidosa on Water Quality, Floc Formation, and Microbial Composition in Biofloc System

Published: Jan. 1, 2025

Chlorella pyrenoidosa was recognized for its ability to bolster biofloc formation, but the specific components responsible this enhancement have not been fully elucidated. In study, six groups were set up—algal cell culture solution (ACC), algal cells (AC), extracellular secretions (ES), intracellular substances (IS), fragments (CF), and medium (CK)—to assess their impacts on water quality, microbial community structure. The results revealed that IS group of had highest flocculation rate, total amount flocs in each ranked as > AC CF ACC CK ES. significantly outperformed other promoting having largest 400 mL/L. component could provide essential nutrients growth enhance floc stability by increasing prevalence dominant bacterial genera such Flavobacterium Shinella. addition contributed removal nitrogen. achieved a nitrogen rate up 40%, while ES demonstrated efficiency, reaching 80%. These findings are pivotal elucidating role formation quality regulation.

Language: Английский

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