Beyond an Applicable Rate in Low-Strength Wastewater Treatment by Anammox: Motivated Labor at an Extremely Short Hydraulic Retention Time

Environmental Science & Technology, Journal Year: 2022, Volume and Issue: 56(12), P. 8650 - 8662

Published: May 10, 2022

The application of anammox technology in low-strength wastewater treatment is still challenging due to unstable nitrite (NO2--N) generation. Partial denitrification (PD) nitrate (NO3--N) reduction ending with NO2--N provides a promising solution. However, little known about the feasibility accelerating nitrogen removal toward practical combined heterotrophic denitrification. In this work, an ultrafast, highly stable, and impressive performance was demonstrated PD coupling (PD/A) system. With influent [50 mg/L each ammonia (NH4+-N) NO3--N] at low chemical oxygen demand/NO3--N ratio 2.2, hydraulic retention time could be shortened from 16.0 1.0 h. Remarkable rates 1.28 kg N/(m3 d) excellent total efficiency 94.1% were achieved, far exceeding applicable capacity for mainstream treatment. Stimulated enzymatic reaction activity obtained fast jump followed by famine condition limited organic carbon utilization. This high-rate PD/A system exhibited efficient renewal bacteria short sludge time. 16S rRNA sequencing unraveled rapid growth genus Thauera, possibly responsible incomplete NO3--N decreasing abundance bacteria. new insights into process energy-efficient less land occupancy desirable effluent quality.

Language: Английский

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A critical review on microbial ecology in the novel biological nitrogen removal process: Dynamic balance of complex functional microbes for nitrogen removal

The Science of The Total Environment, Journal Year: 2022, Volume and Issue: 857, P. 159462 - 159462

Published: Oct. 17, 2022

Language: Английский

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Progress of Anaerobic Membrane Bioreactor in Municipal Wastewater Treatment

Science of Advanced Materials, Journal Year: 2023, Volume and Issue: 15(10), P. 1277 - 1298

Published: Oct. 1, 2023

Anaerobic Membrane Bioreactor (AnMBR), as a new technology to achieve efficient energy recovery from municipal wastewater, has received widespread attention, but it still faces huge technical and economic challenges. The characteristics of AnMBR for sewage treatment the long-term control method membrane fouling need further research, operation at low temperature needs be solved. This review aims discuss research progress bottleneck wastewater through process characteristics, formation mechanism, regulation action mechanism. paper discusses main challenges solutions in application process, on this basis, looks forward development direction treatment. It provide reference promoting treat low-concentration realize reuse resources sewage.

Language: Английский

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From hybrid process to pure biofilm anammox process: Suspended sludge biomass management contributing to high-level anammox enrichment in biofilms

Water Research, Journal Year: 2023, Volume and Issue: 236, P. 119959 - 119959

Published: April 9, 2023

Language: Английский

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Double-edged sword effects of dissimilatory nitrate reduction to ammonium (DNRA) bacteria on anammox bacteria performance in an MBR reactor

Water Research, Journal Year: 2023, Volume and Issue: 233, P. 119754 - 119754

Published: Feb. 20, 2023

Language: Английский

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Spatiotemporal Assembly and Immigration of Heterotrophic and Anammox Bacteria Allow a Robust Synergy for High-Rate Nitrogen Removal

Environmental Science & Technology, Journal Year: 2023, Volume and Issue: 57(24), P. 9075 - 9085

Published: June 7, 2023

The novel partial denitrification-driven anammox (PD/A) is an energy-efficient method for nitrogen removal from wastewater. However, its stability and efficiency are impeded by the competition between heterotrophic denitrifying bacteria relatively slow-growing bacteria. In this study, a PD/A granular sludge system was developed, which achieved of 94% with 98% contribution, even as temperature dropped to 9.6 °C. Analysis bacterial activity in aggregates different sizes revealed that largest granules (>2.0 mm) exhibited highest activity, 2.8 times flocs (<0.2 mm), while showed significantly higher nitrite production rates PD, more than six granules. Interestingly, fluorescent situ hybridization (FISH) combined confocal laser scanning microscopy (CLSM) nest-shaped structure Thauera genus, key contributor highly enriched at outer edge, providing substrate inside As decreased, transformed into small efficiently retain This study provides multidimensional insights spatiotemporal assembly immigration autotrophic stable high-rate removal.

Language: Английский

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The mixed/mixotrophic nitrogen removal for the effective and sustainable treatment of wastewater: From treatment process to microbial mechanism

Water Research, Journal Year: 2022, Volume and Issue: 226, P. 119269 - 119269

Published: Oct. 17, 2022

Language: Английский

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Mechanism of suspended sludge impact on anammox enrichment in anoxic biofilm through long term operation and microbial analysis

Water Research, Journal Year: 2022, Volume and Issue: 229, P. 119412 - 119412

Published: Nov. 24, 2022

Language: Английский

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Coupling fundamental mechanisms and operational controls in mainstream partial denitrification for partial denitrification anammox applications: A review

Journal of Cleaner Production, Journal Year: 2023, Volume and Issue: 400, P. 136741 - 136741

Published: March 9, 2023

Language: Английский

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How to Provide Nitrite Robustly for Anaerobic Ammonium Oxidation in Mainstream Nitrogen Removal

Environmental Science & Technology, Journal Year: 2023, Volume and Issue: 57(51), P. 21503 - 21526

Published: Dec. 14, 2023

Innovation in decarbonizing wastewater treatment is urgent response to global climate change. The practical implementation of anaerobic ammonium oxidation (anammox) treating domestic the key reconciling carbon-neutral management with sustainable development. Nitrite availability prerequisite anammox reaction, but how achieve robust nitrite supply and accumulation for mainstream systems remains elusive. This work presents a state-of-the-art review on recent advances anammox, paying special attention available pathways (forward-going (from nitrite) backward-going nitrate nitrite)), controlling strategies, physiological ecological characteristics functional microorganisms involved supply. First, we comprehensively assessed nitrite-oxidizing bacteria control methods, outlining that these technologies are transitioning possessing multiple selective pressures (such as intermittent aeration membrane-aerated biological reactor), integrating side stream free ammonia/free nitrous acid suppression recirculated sludge treatment), maintaining high activity ammonia-oxidizing competing oxygen bacteria. We then highlight emerging strategies supply, including production driven by novel microbes (ammonia-oxidizing archaea complete ammonia bacteria) reduction (partial denitrification nitrate-dependent methane oxidation). resources requirement different analyzed, hybrid pathway combining partial nitrification encouraged. Moreover, data-driven modeling process well proactive microbiome proposed hope achieving application. Finally, existing challenges further perspectives highlighted, i.e., investigation nitrite-supplying bacteria, scaling-up from laboratory under real conditions, stable performance fundamental insights this aim inspire advance our understanding about provide robustly shed light important obstacles warranting settlement.

Language: Английский

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