Simultaneous Nitrification–Endogenous Denitrification with Phosphorus Removal Sustained by Aeration-Free Filamentous Microalgal–Bacterial Granular Sludge for Low C/N Wastewater Treatment

ACS ES&T Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 22, 2025

The innovative and carbon-neutral phototrophic simultaneous nitrification–endogenous denitrification with phosphorus removal (P-SNDPR) process presents significant advantages for low C/N wastewater treatment. Effective implementation of SNDPR relies on establishing anoxic zones during light-aerobic stages, which poses challenges in suspended sludge systems. Microalgal–bacterial granular (MBGS) may address these due to its biological chemical stratified microniches, although the granulation, structure, performance MBGS under aeration-free conditions remain unreported. This study successfully cultivated filamentous a distinct oxygen gradient microbial stratification within landscape. Filamentous cyanobacteria (f_Leptolyngbyaceae) functional genera responsible nutrient granulation (Acinetobacter, Candidatus Competibacter, Zoogloea, Flavobacterium, Hydrogenophaga) were enriched. had high efficiencies COD (92.9 ± 1.2%), NH4–N (95.0 0.7%), TN (83.8 1.4%), PO4–P (96.8 0.9%) an aerobic SND efficiency 77.8 2.7%. Typical cycle batch tests demonstrated that achieved efficient SNDPR. Mass balance calculations indicated most removed carbon (76.0%) (97.6%) converted biomass. MBGS-SNDPR established synergistic pathway carbon, nitrogen, metabolism, suggesting potential applications sustainable

Language: Английский

Investigating the Impact of Oxygenic Photo Granules (OPGs) Structure on Wastewater Treatment and Bioenergy Generation

Journal of environmental chemical engineering, Journal Year: 2025, Volume and Issue: unknown, P. 116838 - 116838

Published: May 1, 2025

Language: Английский

Sudden sulfamethoxazole shock leads to nitrite accumulation in microalgae-nitrifying bacteria consortia: Physiological responses and light regulating strategy

Journal of Environmental Management, Journal Year: 2024, Volume and Issue: 366, P. 121714 - 121714

Published: July 19, 2024

Language: Английский