Enhancing anammox process with granular activated carbon: A study on Microbial Extracellular Secretions (MESs)

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 926, P. 171980 - 171980

Published: March 26, 2024

Granular activated carbon (GAC), a porous carbon-based material, provides increased attachment space for functional microorganisms and enhances nitrogen removal by facilitating extracellular electron transfer in the anammox process. This study investigates effects of GAC on biosynthesis microbial secretions (MESs) explores roles these activities. Four lab-scale reactors were operated: two downstream UASB (D1 D2) receiving effluents from upstream (U1: no-GAC, U2: yes-GAC). Our results indicate that MESs enhanced with addition GAC. The effluent U2 exhibited 59.62 % higher amino acid content than U1. These contributed to an increase loading rate (NLR) reactors. Specifically, NLR D1 130.5 142.7 g N/m3/day, D2, it escalated 137.5 202.8 likely through acting as cross-feeding substrates or vital nutrients. D2 also showed bacterial activity, enriched Ca. Brocadia population hao gene abundance. Furthermore, this revealed sludge has significantly polymeric substances (EPS) (48.71 mg/g VSS) larger average granule size (1.201 ± 0.119 mm) compared sludge. Overall, GAC-stimulated may have performance

Language: Английский

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Treatment of low-C/N nitrate wastewater using a partial denitrification-anammox granule system: Granule reconstruction, stability, and microbial structure analyses

Journal of Environmental Management, Journal Year: 2024, Volume and Issue: 366, P. 121760 - 121760

Published: July 8, 2024

Language: Английский

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Engineering application on the combination of simultaneous partial nitrification and denitrification and anammox for advanced nitrogen removal from landfill leachate

Bioresource Technology, Journal Year: 2025, Volume and Issue: unknown, P. 132257 - 132257

Published: Feb. 1, 2025

Language: Английский

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Rapid Start-Up and Sustained Performance of Anaerobic Biofilm Reactors for Nitrogen Removal in Low C/N Wastewater: Characterization And Microbial Community Analysis of the Pd/A Process

Published: Jan. 1, 2025

Language: Английский

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Denitrification enhancement, kinetic simulation and microbial assessment in the sponge iron-mediated anammox process: A method for low-strength nitrogen wastewater treatment

Journal of Water Process Engineering, Journal Year: 2025, Volume and Issue: 72, P. 107550 - 107550

Published: March 27, 2025

Language: Английский

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Rapid Start-up and Sustained Performance of an Anaerobic Biofilm Reactor for Nitrogen Removal in Low C/N Wastewater: Characterization and Microbial Community Analysis of the PD/A Process

Journal of environmental chemical engineering, Journal Year: 2025, Volume and Issue: unknown, P. 116685 - 116685

Published: April 1, 2025

Language: Английский

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Response and self-regulation of PD/A granular sludge to oxytetracycline stress

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 943, P. 173674 - 173674

Published: May 31, 2024

Language: Английский

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Removal of nitrogen from wastewater: Unsolved problems and possible solutions with partial denitrification/anammox systems

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: unknown, P. 156131 - 156131

Published: Sept. 1, 2024

Language: Английский

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The construction of double short-cut sulfur autotrophic denitrification and PN/Anammox partition and its effect on the coupling performance of nitrogen and sulfur removal

Journal of Cleaner Production, Journal Year: 2024, Volume and Issue: unknown, P. 144071 - 144071

Published: Oct. 1, 2024

Language: Английский

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Response and Self-Regulation of Pd/A Granular Sludge to Oxytetracycline Stress

Published: Jan. 1, 2024

Oxytetracycline (OTC), as one of the most representative emerging pollutants, accumulates in municipal wastewater treatment plants through various pathways, posing significant challenges for future engineering promotion partial denitrification/anammox (PD/A) process. This paper investigated operational characteristics PD/A granular system under OTC stress, analyzing self-regulation mechanism sludge system. The results showed that when concentration was less than 100 mg/L, its short-term inhibition on become stronger with increase concentration, and there a slight decrease functional bacterial activity. However, between 150 300 ability PD converted NO3--N to NO2--N gradually weakened, Anammox activity significantly inhibited. Under long-term stress high (20 30 mg/L), nitrogen removal performance deteriorated. Batch tests inhibited (NTR: 73.77% 50.17%). bacteria rapidly decreased, μ(NH4+-N) decreasing from 1.81 mg N/gVSS/h 0.39 N/gVSS/h. continuous EPS content (185.39 210.86 mg/gVSS) stimulation indicated resisted adverse environmental interference achieved self-protection by regulating secretion. overloaded (30 cell lysis deactivation leaded content. relative abundance Candidatus_Brocadia (2.32% 0.93%) Thaure (12.63% 7.82%) key factor gradual deterioration denitrification performance. study expected provide guidance process cope antibiotics other pollutants (short-term shock stress).

Language: Английский

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