Chemosphere, Journal Year: 2024, Volume and Issue: 367, P. 143622 - 143622
Published: Oct. 31, 2024
Language: Английский
The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 926, P. 171900 - 171900
Published: March 24, 2024
The long-stabilized mainstream partial nitritation/Anammox (PN/A) process continues to encounter significant challenges from nitrite-oxidizing bacteria (NOB). Therefore, this study aimed determine an efficient, rapid, and easily implementable strategy for inhibiting NOB. A laboratory-scale reactor was operated continuously 325 days, experiencing NOB outbreak in recovery with simulated sidestream support. results show that direct inhibitory strategies including intermittent aeration approximately 35 mg/L free ammonia had unusual weak effects on activity. Subsequently, the exogenous Anammox employed as a competitive bio-augmentation approach rapidly inhibited dynamics. Evidence suggests damaged hydroxyapatite granules under low pH conditions might have contributed dominance by diminishing activity, thereby creating substrate-rich environment favoring survival. In contrast, introduction of Candidatus Kuenenia facilitated nitrogen removal efficiency 32.5 % over 80 %. This coincided decrease relative abundance Nitrospira 16.5 2.7 activity 0.34 0.07 g N/(g mixed liquor volatile suspended solid)/d. Metagenomic analysis reveals functional potential most nitrite transport proteins, coupled increase eukaryotic-like serine/threonine-protein kinase involved cellular regulation, during recovery. study's findings reveal feasibility based substrate competition, wherein processes support PN/A integration, offering practical applications.
Language: Английский
Citations
5
Applied Sciences, Journal Year: 2024, Volume and Issue: 14(17), P. 7801 - 7801
Published: Sept. 3, 2024
The partial nitritation (PN)–anammox (PN/A) process offers a sustainable alternative to nitrogen management in wastewater treatment, addressing the high costs and increasing low eco-friendliness associated with traditional nitrification/denitrification processes. Stable (PN) is critical for effective PN/A operation, this study specifically focused on need suppress nitrite-oxidizing bacteria (NOB) facilitate enrichment of ammonia-oxidizing (AOB). Utilizing two sequencing batch reactors (SBRs), PN1 PN2 different free ammonia (FA) concentrations, aimed evaluate NOB suppression strategy while enriching AOB. reactor, which operated higher initial FA concentration (50 mg/L), successfully maintained activity, 96.1% ammonium removal efficiency (ARE) 95.1% nitrite accumulation (NAE) at reduced influent NH4+-N concentrations mg NH4+-N/L, 10 mg/L). In contrast, showed inadequate due lower (10 These results suggest that initiating can effectively NOB, enhancing stability processes mainstream applications.
Language: Английский
Citations
2
Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 501, P. 157625 - 157625
Published: Nov. 12, 2024
Language: Английский
Citations
2
Environmental Technology, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 15
Published: Dec. 12, 2024
Adding biochar can expedite the establishment of anaerobic ammonia oxidation (anammox) process and improve nitrogen removal efficiency anammox reactor. However, optimization research derived from dewatered sludge on is relatively limited. In this study, four sequencing batch reactors (SBRs) were compared for enrichment bacteria using synthetic wastewater with carbonized at temperatures 300°C, 550°C, 800°C, without (CK). The start-up performance evaluated, as well effect organic carbon removal. results showed that addition different pyrolysis all accelerate process, efficiency, reduce total (TN) in effluent. Although reactor 800°C fastest increase loading, best TNRE occurred which was 8.0% higher than those control (CK,
Language: Английский
Citations
1
Chemosphere, Journal Year: 2024, Volume and Issue: 367, P. 143622 - 143622
Published: Oct. 31, 2024
Language: Английский
Citations
0