Aerobic granular sludge enhances start-up and granulation in single-stage partial nitritation anammox granular sludge systems: Performance, mechanism, and shifts in bacterial communities DOI
Jing Huang, Jun Li, Xiaoyu Han

et al.

Bioresource Technology, Journal Year: 2024, Volume and Issue: 416, P. 131760 - 131760

Published: Nov. 6, 2024

Language: Английский

Comprehensive Analysis of Oxidation Ditch and High-Efficiency Multi-Cycle A2/O Processes Performance in Urban Wastewater Treatment DOI Open Access
Jun Liu, Kangping Cui, Zhen Yan

et al.

Water, Journal Year: 2025, Volume and Issue: 17(5), P. 713 - 713

Published: Feb. 28, 2025

Oxidation ditch and Anaerobic–Anoxic–Oxic (A2/O) processes have been applied in urban wastewater treatment plants for decades, but the differences between two engineering applications are less studied. Based on continuous monitoring of Ningyang’s sewage plant (Shandong, China) one year, this study systematically analyzed removal efficiencies nutrients oxidation modified high-efficiency multi-cycle A2/O processes. The results showed that chemical oxygen demand (COD) total phosphorus (TP) process Phase II project was better than I project, average concentration COD TP effluent 49.9% 51.7% lower process, respectively. rate ammonia nitrogen (NH4+-N) by basically same, while (TN) 31.4% process. In summary, had a performance regarding nutrient under same conditions. Furthermore, operational costs were lower.

Language: Английский

Citations

0
Formation and Characterization of Aerobic Granular Sludge in the Treatment of Tempering Lubricant Wastewater by Hydrolysis Acidification-Aerobic Process DOI
Guanyi Yang, Juan Lv, Chaoyang Chen

et al.

Environmental Engineering Science, Journal Year: 2025, Volume and Issue: unknown

Published: March 26, 2025

Language: Английский

Citations

0
Characteristics, Performance and Microbial Response of Aerobic Granular Sludge for Treating Tetracycline Hypersaline Pharmaceutical Wastewater DOI Creative Commons

Bichen Lou,

Zhonghui Yang,

Shengyan Zheng

et al.

Microorganisms, Journal Year: 2024, Volume and Issue: 12(6), P. 1173 - 1173

Published: June 9, 2024

Salt-tolerant aerobic granular sludge(AGS) was successfully cultivated under the dual stress of tetracycline and 2.5% salinity, resulting in an average particle size 435.0 ± 0.5 exhibiting a chemical oxygen demand(COD) removal rate exceeding 80%, as well excellent sedimentation performance. The analysis metagenomics technology revealed significant pattern succession development AGS. proportion Oleiagrimonas, type salt-tolerant bacteria, exhibited gradual increase reached 38.07% after 42 days, which indicated that AGS system based on moderate halophilic bacteria constructed. expression levels targeted genes were found to be reduced across entire process formation, evidenced by qPCR analysis. presence int1 (7.67 log10 gene copies g−1 0 d sludge sample) enabled microbes horizontally transfer ARGs along formation double pressure TC salinity. These findings will enhance our understanding ARG profiles pressure, providing foundation for guiding use treat hypersaline pharmaceutical wastewater.

Language: Английский

Citations

3
Effect of settling time and organic loading rates on aerobic granulation processes treating high strength wastewater DOI Creative Commons

Kyung Jin Min,

Eunyoung Lee,

Ah Hyun Lee

et al.

Heliyon, Journal Year: 2024, Volume and Issue: 10(16), P. e36018 - e36018

Published: Aug. 1, 2024

Despite its numerous advantages, the aerobic granular sludge (AGS) process faces several challenges that hinder widespread implementation. One such challenge is requirement for high organic load ratios (OLR), which significantly impacts AGS formation and stability, posing a barrier to commercialization. In response these challenges, this study investigates granulation treatment efficacy of treating high-concentration wastewater under various OLR settling time. Three sequential batch reactors (R1, R2, R3) were operated at OLRs 0.167, 0.33, 1 kg COD/m3·day. The focuses on analyzing key parameters including characteristics, extracellular polymeric substances (EPS) content, PN/PS ratio, microbial clusters. Results demonstrate reducing time from 90 30 min enhances settleability, resulting in maximum 50.8 % decrease SVI30 (from 98.1 122.8 mL/g 51.9–81.3 mL/g), thereby facilitating selection beneficial microorganisms during granulation. Particularly, ratio was 4.3, EPS content increased by 1.52-fold, leading 1.41-fold increase attachment. This observation suggests progressive maturation AGS. Additionally, analysis diversity cluster composition highlights influence variations Proteobacteria Bacteroidetes. These findings emphasize significant impact SBR operational strategies performance biological offering valuable insights efficient operation future processes.

Language: Английский

Citations

3
Promotion of polyhydroxyalkanoates-producing granular sludge formation by lactic acid using anaerobic dynamic feeding process DOI

Jiaxing Xi,

Wenjie Fang, Huihui Zhang

et al.

Journal of Biotechnology, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 1, 2024

Language: Английский

Citations

1
Enhancing Wastewater Treatment with Aerobic Granular Sludge: Impacts of Tetracycline Pressure on Microbial Dynamics and Structural Stability DOI Creative Commons

Shengyan Zheng,

Bichen Lou,

Zhonghui Yang

et al.

Microorganisms, Journal Year: 2024, Volume and Issue: 12(9), P. 1913 - 1913

Published: Sept. 20, 2024

This study evaluated the efficiency of aerobic granular sludge (AGS) technology in treating wastewater contaminated with tetracycline (TC), a common antibiotic. AGS was cultivated under TC pressure gradient ranging from 5 mg/L to 15 and compared conventional conditions. The results demonstrated that achieved high removal efficiencies exhibited robust sedimentation performance, significant differences average particle sizes observed both conditions (618.6 μm vs. 456.4 conditions). Importantly, exposure found alter composition production extracellular polymeric substances (EPSs), thereby enhancing structural integrity functional stability AGS. Additionally, selective induced shifts microbial community composition; Rhodanobacter played crucial role EPS biological aggregation, metabolic AGS, while Candida tropicalis remarkable resilience nutrient stressful environmental These findings underscore potential as promising solution for advancing treatment methods, thus contributing protection sustainability amid growing concerns over antibiotic contamination.

Language: Английский

Citations

1
Effect of Settling Time and Organic Loading Rates on Aerobic Granulation Processes Treating High Strength Wastewater DOI

Kyung Jin Min,

Eun Young Lee,

Ah Hyun Lee

et al.

Published: Jan. 1, 2024

Despite its numerous advantages, the aerobic granular sludge (AGS) process faces several challenges that hinder widespread implementation. One such challenge is requirement for high organic load ratios (OLR), which significantly impacts AGS formation and stability, posing a barrier to commercialization. In response these challenges, this study investigates granulation treatment efficacy of treating high-concentration wastewater under OLR. Three sequential batch reactors (R1, R2, R3) were operated at OLRs 0.167, 0.33, 1 kg COD/m3·day. The focuses on analyzing key parameters including characteristics, extracellular polymeric substances (EPS) content, PN/PS ratio, microbial clusters. Results demonstrate reducing settling time from 90 30 minutes enhances settleability, resulting in maximum 50.8% decrease SVI (from 98.1-122.8 mL/mg SS 51.9-81.3 SS), thereby facilitating selection beneficial microorganisms during granulation. Particularly, ratio was 4.3, EPS content increased by 1.52-fold, leading 1.41-fold increase attachment. This observation suggests progressive maturation AGS. Additionally, analysis diversity cluster composition highlights influence OLR variations Proteobacteria Bacteroidetes. These findings emphasize significant impact SBR operational strategies performance biological offering valuable insights efficient operation future processes.

Language: Английский

Citations

0
Significantly accelerated aerobic granulation using Ca(ClO)2 hydrothermally pretreating sludge DOI
Tingting Cao, Xiaomeng Li, Yue Yang

et al.

Journal of Water Process Engineering, Journal Year: 2024, Volume and Issue: 65, P. 105858 - 105858

Published: July 26, 2024

Language: Английский

Citations

0
Aerobic granular sludge enhances start-up and granulation in single-stage partial nitritation anammox granular sludge systems: Performance, mechanism, and shifts in bacterial communities DOI
Jing Huang, Jun Li, Xiaoyu Han

et al.

Bioresource Technology, Journal Year: 2024, Volume and Issue: 416, P. 131760 - 131760

Published: Nov. 6, 2024

Language: Английский

Citations

0