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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PBAT microplastics exacerbates N2O emissions from tropical latosols mainly via stimulating denitrification

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 495, P. 153681 - 153681

Published: July 3, 2024

Language: Английский

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Migration and transformation behaviors of antibiotics in water-sediment system under simulated light and wind waves

Journal of Hazardous Materials, Journal Year: 2024, Volume and Issue: 471, P. 134287 - 134287

Published: April 16, 2024

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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Effect of free ammonia control strategy on partial nitrification-denitrification in MBR reactor under low C/N conditions: performance, SMP and EPS, and microbial community

Journal of environmental chemical engineering, Journal Year: 2025, Volume and Issue: unknown, P. 116273 - 116273

Published: March 1, 2025

Language: Английский

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A Novel Perspective on the Instability of Mainstream Partial Nitrification: The Niche Differentiation of Nitrifying Guilds

Environmental Science & Technology, Journal Year: 2025, Volume and Issue: unknown

Published: April 28, 2025

Short-cut biological nitrogen removal (sBNR) favors the paradigm shift toward energy-positive and carbon-neutral wastewater treatment processes. Partial nitrification (PN) is a key approach to provide nitrite for anammox or denitritation during sBNR, its stability precondition achieving robust performance. However, maintaining stable mainstream PN process has been long-standing challenge. This review analyzes from microbial ecology perspective, focusing on niche differentiation among nitrifiers. First, we propose that systems are ecologically unstable, failure of due reactivation nitrite-oxidizing bacteria (NOB) can be regarded as behavior restore system stabilization. Thus, primarily relies enhancing between ammonia-oxidizing (AOB) NOB. We then summarize realized niches indigenous nitrifiers within discuss their ecophysiological characteristics (e.g., cell structure substrate affinity) define specific ecological niches. By comparing breadths AOB NOB various axes, further identify different responses (resistance) (resilience) exogenous perturbations. Finally, outlook through an lens. provides insights into instability process, which intended guide derivation optimized strategies single-factor integrated solutions.

Language: Английский

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Elevated dissolved oxygen alleviated the stimulation of ciprofloxacin and alkyltrimethyl ammonium compound on the dissemination of resistance genes in nitrifying system

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 163313 - 163313

Published: May 1, 2025

Language: Английский

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Effect of soil-groundwater system on migration and transformation of organochlorine pesticides: A review

Ecotoxicology and Environmental Safety, Journal Year: 2024, Volume and Issue: 290, P. 117564 - 117564

Published: Dec. 18, 2024

Language: Английский

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Optimizing anoxic/oxic intervals in intermittent aeration for STHP-AD filtrate treatment: Restoring partial nitrification and community dynamics in the SPNAD system

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 501, P. 157631 - 157631

Published: Nov. 12, 2024

Language: Английский

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A comprehensive analysis of microbial community differences in four morphologies of mainstream anaerobic ammonia oxidation systems using big-data mining and machine learning

Frontiers in Marine Science, Journal Year: 2024, Volume and Issue: 11

Published: Sept. 4, 2024

Achieving carbon neutrality in wastewater treatment plants relies heavily on mainstream anaerobic ammonia oxidation. However, the stability of this process is often compromised, largely due to significant influence microbial morphology. This study analyzed 208 samples using bioinformatics and machine learning (ML) across four different morphologies: Suspended Sludge (SS), Biofilm, Granular (GS) Integrated Fixed-film Activated (IFAS). The results revealed IFAS’s notably complex stable community structure, along with identification endemic genera common among morphologies. Through co-occurrence network analysis, interaction between microorganisms various was displayed. Utilizing Extreme Gradient Boosting (XGBoost) model, a ML modeling framework based microbiome data developed. ML-based feature importance analysis identified LD-RB-34 as key organism SS BSV26 an important bacterium IFAS. Additionally, functional bacteria KF-JG30-C25 occupied higher proportion GS, Unclassified Brocadiaceae Biofilm. Furthermore, dissolved oxygen, temperature pH were primary factors determining communities influencing anammox activity. Overall, deepens our understanding bacterial enhance nitrogen removal.

Language: Английский

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