A new strategy for greenhouse gas emission reduction in the anaerobic/anoxic/oxic biological treatment process using exogenous N-acyl-homoserine lactones, a quorum-sensing signaling molecules DOI Creative Commons
Wenjiao Sang, Z. W. Ge, Qian Zhang

et al.

Water Science & Technology, Journal Year: 2024, Volume and Issue: 90(10), P. 2764 - 2783

Published: Nov. 11, 2024

ABSTRACT In this study, the impact of exogenous N-acyl-homoserine lactones (AHLs) on greenhouse gas (GHG) emissions in anaerobic/anoxic/oxic (A/A/O) systems was analyzed by manipulating type and dosage AHLs. The mechanism behind AHLs’ effects GHG explored through changes microbial community structure. Findings revealed that N-octanoyl-homoserine lactone (C8-HSL) high-dose N-dodecanoyl-homoserine (C12-HSL) increased emissions, while low-dose C12-HSL decreased them. Moreover, C8-HSL promoted methane (CH4) nitrous oxide (N2O) production affecting sludge particle size. Bacterial analysis highlighted Acinetobacter Flavobacterium's roles N2O acetate methanogens synthesis. Metabolic pathway showed acetic acid (CH3COOH) methanogenic main pathway; influenced emission changing reductase (Nos) abundance. This research underscores AHL-based quorum sensing's potential mitigating during activated wastewater treatment, offering insights into their application key activities. Limitations include absence reduction signaling molecules need for further investigation accumulation.

Language: Английский

Heterotrophic nitrification processes driven by glucose and sodium acetate: New insights into microbial communities, functional genes and nitrogen metabolism from metagenomics and metabolomics DOI

Jingang Hu,

Jiao-Yang Tian,

Xiangyi Deng

et al.

Bioresource Technology, Journal Year: 2024, Volume and Issue: 408, P. 131226 - 131226

Published: Aug. 6, 2024

Language: Английский

Citations

4
Gradient Dissolved Oxygen Created by Limited Aeration Triggers Ammonia Assimilation: Insight into Efficient Nitrogen Removal with Nutrient Harvest DOI
Ying Wu, Zheng Wang,

Xumeng Lin

et al.

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

Citations

0
Indigenous bacterial adaptation and survival: Exploring the shifts in highly compacted bentonite over a 5-year long-term study for nuclear repository purposes DOI
Cristina Povedano‐Priego, Fadwa Jroundi,

Esther Peula-Ruiz

et al.

Journal of Hazardous Materials, Journal Year: 2025, Volume and Issue: 489, P. 137526 - 137526

Published: Feb. 7, 2025

Language: Английский

Citations

0
Sulfur cycle process accelerates microbial fuel cells driven denitrification system: Low sulfate yield and enrichment of functional microorganisms DOI
Yue Li, Hanmin Zhang

Bioresource Technology, Journal Year: 2025, Volume and Issue: unknown, P. 132432 - 132432

Published: March 1, 2025

Language: Английский

Citations

0
Anaerobic treatment of refractory industrial organic wastewater: A review of bioenergy recovery and low-carbon nitrogen removal toward carbon neutrality DOI
Zixuan Deng,

Chengde Sun,

Guangyi Ma

et al.

Journal of Water Process Engineering, Journal Year: 2025, Volume and Issue: 72, P. 107515 - 107515

Published: March 23, 2025

Language: Английский

Citations

0
Comprehensive revealing the destructive effect and inhibitory mechanism of oxytetracycline on aerobic denitrification bacteria Acinetobacter sp. AD1 based on cell state, electron behavior and intracellular environment. DOI

Qidi Mao,

Jianguo Bao, Jiangkun Du

et al.

Journal of Hazardous Materials, Journal Year: 2025, Volume and Issue: unknown, P. 138058 - 138058

Published: March 1, 2025

Language: Английский

Citations

0
Comparison of the start-up of rotating biofilm contactor reactor with HN-AD bacteria inoculation under high and low influent ammonia conditions DOI

Shumin Qin,

Yan Lin,

Chenxi Yang

et al.

Journal of Environmental Management, Journal Year: 2025, Volume and Issue: 381, P. 125206 - 125206

Published: April 9, 2025

Language: Английский

Citations

0
Vanadium Stress-Driven Microbial Acclimation Enhances Biological Denitrification in Recycling of Vanadium-Containing Industrial Wastewater DOI Creative Commons

Yucheng She,

Yimin Zhang, Qiushi Zheng

et al.

Microorganisms, Journal Year: 2025, Volume and Issue: 13(5), P. 1003 - 1003

Published: April 27, 2025

Recirculation in vanadium mining enhances resource efficiency but risks ammonia nitrogen (NH3-N) accumulation, severely compromising leaching yields. To address this bottleneck, we developed a bioaugmentation strategy using Pseudomonas sp. S.P-1 acclimated to stress. Under optimized conditions (sodium citrate as carbon source, C/N = 5, 5% inoculum, and pH 8), the strain achieved exceptional NH3-N (2000 mg·L−1) removal (>99.25% within 16 days; residual NH4+ < 15 mg·L−1), 12.7% higher than original bacteria. Mechanistic studies revealed that exposure triggered dual adaptive responses: enhanced biosorption via stimulated synthesis of extracellular polymeric substances (EPS) enriched with negatively charged functional groups (C=O, -COOH-, C-N), improving adsorption capacity, metabolic activation an elevated transmembrane electrochemical potential accelerated substrate uptake due cell membrane permeability, while up-regulation monooxygenase (AMO) activity (123.11%) facilitated efficient NH4+→NH2OH conversions. Crucially, bio-process enabled simultaneous degradation (89.2% efficiency) recovery, demonstrating its role pollution control critical metal recycling. By integrating microbial resilience circular economy principles, our offers scalable prototype for sustainable extraction, aligning low-carbon metallurgy demands clean energy transitions. This study investigated ability stress enhance metabolism, by acclimatizing vanadium-containing solutions, aimed problems accumulation toxicity wastewater recirculation.

Language: Английский

Citations

0
Impacts of O2:CH4 ratios and CH4 concentrations on the denitrification and CH4 oxidations of a novel AME-AD system DOI

Yujing Fan,

Zhiling Gao,

Xueyou Liang

et al.

Environmental Research, Journal Year: 2024, Volume and Issue: 262, P. 119866 - 119866

Published: Aug. 30, 2024

Language: Английский

Citations

0
A new strategy for greenhouse gas emission reduction in the anaerobic/anoxic/oxic biological treatment process using exogenous N-acyl-homoserine lactones, a quorum-sensing signaling molecules DOI Creative Commons
Wenjiao Sang, Z. W. Ge, Qian Zhang

et al.

Water Science & Technology, Journal Year: 2024, Volume and Issue: 90(10), P. 2764 - 2783

Published: Nov. 11, 2024

ABSTRACT In this study, the impact of exogenous N-acyl-homoserine lactones (AHLs) on greenhouse gas (GHG) emissions in anaerobic/anoxic/oxic (A/A/O) systems was analyzed by manipulating type and dosage AHLs. The mechanism behind AHLs’ effects GHG explored through changes microbial community structure. Findings revealed that N-octanoyl-homoserine lactone (C8-HSL) high-dose N-dodecanoyl-homoserine (C12-HSL) increased emissions, while low-dose C12-HSL decreased them. Moreover, C8-HSL promoted methane (CH4) nitrous oxide (N2O) production affecting sludge particle size. Bacterial analysis highlighted Acinetobacter Flavobacterium's roles N2O acetate methanogens synthesis. Metabolic pathway showed acetic acid (CH3COOH) methanogenic main pathway; influenced emission changing reductase (Nos) abundance. This research underscores AHL-based quorum sensing's potential mitigating during activated wastewater treatment, offering insights into their application key activities. Limitations include absence reduction signaling molecules need for further investigation accumulation.

Language: Английский

Citations

0