Combination of Sequencing Batch Operation and A/O Process to Achieve Partial Mainstream Anammox: Pilot-Scale Demonstration and Microbial Ecological Mechanism

Environmental Science & Technology, Journal Year: 2023, Volume and Issue: 57(37), P. 13887 - 13900

Published: Sept. 5, 2023

In this study, sequencing batch operation was successfully combined with a pilot-scale anaerobic biofilm-modified anaerobic/aerobic membrane bioreactor to achieve ammonium oxidation (anammox) without inoculation of anammox aggregates for municipal wastewater treatment. Both total nitrogen and phosphorus removal efficiencies the reactor reached up 80% in 250-day operation, effluent concentrations 4.95 mg-N/L 0.48 mg-P/L. situ enrichment bacteria maximum relative abundance 7.86% observed biofilm, contributing 18.81% removal, denitrification being primary pathway (38.41%). Denitrifying (DPR) (40.54%) aerobic uptake (48.40%) played comparable roles removal. Metagenomic results showed that biofilm contained significantly lower abundances NO-reducing functional genes than bulk sludge (p < 0.01), favoring catabolism former. Interactions between flanking community were dominated by cooperation behaviors (e.g., nitrite supply, amino acids/vitamins exchange) network. Moreover, hydrolytic/fermentative endogenous heterotrophic (Dechloromonas, Candidatus competibacter) substantially enriched under which could alleviate inhibition complex organics. Overall, study provides feasible promising strategy enriching achieving partial mainstream as well DPR.

Language: Английский

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Performance evaluation of pilot scale ion exchange membrane bioreactor for nitrate removal from secondary effluent

Journal of Cleaner Production, Journal Year: 2024, Volume and Issue: 442, P. 141087 - 141087

Published: Feb. 1, 2024

Language: Английский

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Transferable Deep Slow Feature Network With Target Feature Attention for Few-Shot Time-Series Prediction

IEEE Transactions on Industrial Informatics, Journal Year: 2024, Volume and Issue: 20(5), P. 7292 - 7302

Published: Feb. 8, 2024

Data-driven methods for predicting quality variables in wastewater treatment processes (WWTPs) have mostly ignored the slow time-varying nature of WWTP, and they are data-consuming that need a large amount independent homogeneously distributed data, which makes it difficult to collect. To address this issue with few-shot inconsistent distribution, transfer learning method called transferable deep feature network (TDSFN) time-series prediction is proposed by leveraging knowledge relevant datasets. TDSFN extracts nonlinear features WWTP inertia from time series through constructs domain invariant based on them. Target attention designed enhance predictor adaptability target assigning weights source their similarity features. Furthermore, variational Bayesian inference framework introduced learn parameters TDSFN. The effectiveness verified experiments WWTP.

Language: Английский

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Novel adaptive activated sludge process leverages flow fluctuations for simultaneous nitrification and denitrification in rural sewage treatment

Water Research, Journal Year: 2024, Volume and Issue: 255, P. 121535 - 121535

Published: March 28, 2024

Language: Английский

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Fast circulatory nitrification/denitrification process using continuous flow synchronous settling reactors promotes organic utilization efficiency in nitrogen removal

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 489, P. 151242 - 151242

Published: April 16, 2024

Language: Английский

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A novel simultaneous partial nitrification, anammox, denitrification and fermentation process: Enhancing nitrogen removal and sludge reduction in a single reactor

Bioresource Technology, Journal Year: 2022, Volume and Issue: 369, P. 128484 - 128484

Published: Dec. 10, 2022

Language: Английский

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Anammox-based technologies for municipal sewage nitrogen removal: Advances in implementation strategies and existing obstacles

Journal of Water Process Engineering, Journal Year: 2023, Volume and Issue: 55, P. 104090 - 104090

Published: Aug. 4, 2023

Language: Английский

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Coupled process of in-situ sludge fermentation and riboflavin-mediated nitrogen removal for low carbon wastewater treatment

Bioresource Technology, Journal Year: 2022, Volume and Issue: 363, P. 127928 - 127928

Published: Sept. 9, 2022

Language: Английский

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Nitrogen removal from low COD/N interflow using a hybrid activated sludge membrane-aerated biofilm reactor (H-MABR)

Bioresource Technology, Journal Year: 2022, Volume and Issue: 362, P. 127855 - 127855

Published: Aug. 28, 2022

Language: Английский

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Research on Enhancing Domestic Wastewater Treatment in the Heterotrophic Nitrification–Aerobic Denitrification-Based Anaerobic/Oxic Biofilm System

Water, Journal Year: 2025, Volume and Issue: 17(2), P. 162 - 162

Published: Jan. 9, 2025

Traditional wastewater treatment processes still encounter challenges such as the limited efficiency and excessive greenhouse gas emissions, which restrict their application in environmentally sustainable practices. This study developed an A/O biofilm system assessed impact of inoculating with heterotrophic nitrification–aerobic denitrification (HN–AD) strain Alcaligenes faecalis WT14 on pollutant removal emissions. A continuous monitoring experiment was conducted over 140 days, comparing inoculated (the TWT14 system) non-inoculated CK system). The results demonstrated that outperformed removal, higher NH₄⁺-N, TN, COD efficiencies 11.22%, 21.96%, 12.51%, respectively, quality discharge water from maintaining compliance national standards. improvement underscores positive inoculation enhancing performance system. Regarding exhibited a significantly N₂O emission flux aeration tank compared system, while CO₂ CH₄ emissions were predominantly concentrated anaerobic tank. Global warming potential (GWP) analysis showed no significant difference total average GWP between two systems. However, lower per unit TN removed, highlighting its superior ecological benefits. Environmental factor revealed temperature, pH, humidity, salinity had impacts both Additionally, microbial community indicated enhanced diversity richness within norank_f_JD30-KF-CM45 playing key roles nitrogen removal. provides valuable insights for optimizing design offers scientific guidance upgrading technologies.

Language: Английский

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