Optimization of AAO process for reduced N2O emissions and enhanced nitrogen removal in municipal wastewater treatment: Exploring carbon supplementation and DO control strategies

Water Research, Год журнала: 2025, Номер 276, С. 123247 - 123247

Опубликована: Фев. 4, 2025

Язык: Английский

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Biodegradable Microplastics Increase N₂O Emission from Denitrifying Sludge More Than Conventional Microplastics

Environmental Science & Technology Letters, Год журнала: 2024, Номер unknown

Опубликована: Июнь 10, 2024

Despite the increasing concern about impacts of microplastics on wastewater treatment, underlying mechanism by which affect nitrous oxide (N2O) accumulation during denitrification is still underexplored. In particular, effects biodegradable (BMPs) sewage sludge systems are largely overlooked. Previous studies often used one type polymer as model microplastics, far from a real-world scenario various occurring simultaneously. This work assesses toxic influences chronically adding four typical BMPs versus conventional nonbiodegradable (NBMPs) to denitrifying sludge. Our results showed that both and NBMPs suppressed performance, intensified electron competition, regulated distribution, consequently promoted N2O at chemical oxygen demand:nitrate ratio <4:1. Importantly, more severe were observed in reactor with BMPs. A subsequent mechanistic study revealed significantly decreased relative abundances denitrifiers key genes involved transport consumption system (ETCS), might be related varied extracellular polymeric substance components. contrast, damaged bacterial membranes directly caused dead cells overproducing reactive species, hence disrupting ETCS. Overall, this suggested wastewater, especially BMPs, could disrupt potentially increase greenhouse gas emission.

Язык: Английский

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Enhanced nitrogen and phosphorus removal in gravity driven membrane bioreactor: Performance and mechanism

Separation and Purification Technology, Год журнала: 2025, Номер unknown, С. 131688 - 131688

Опубликована: Янв. 1, 2025

Язык: Английский

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Enhanced denitrification using iron modified biochar under low carbon source condition: Modulating community assembly, allocating carbon metabolism and facilitating electron transfer

Journal of Environmental Management, Год журнала: 2025, Номер 381, С. 125354 - 125354

Опубликована: Апрель 12, 2025

Язык: Английский

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Internal mechanism of microbial nitrogen removal under prolonged low-temperature stress: A focus on microbial communities, metabolic pathways, and microbial function

Chemical Engineering Journal, Год журнала: 2024, Номер 500, С. 157522 - 157522

Опубликована: Ноя. 1, 2024

Язык: Английский

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Efficient nitrogen and phosphorus removal performance and microbial community in a pilot-scale anaerobic/anoxic/oxic (AOA) system with long sludge retention time: Significant roles of endogenous carbon source

Environmental Research, Год журнала: 2024, Номер 263, С. 120164 - 120164

Опубликована: Окт. 15, 2024

Язык: Английский

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In Situ Anammox Self-Enrichment Using a Pilot-Scale Hybrid Membrane-Aerated Biofilm Reactor System for Municipal Wastewater Treatment with a Low Carbon to Nitrogen Ratio

ACS ES&T Engineering, Год журнала: 2025, Номер unknown

Опубликована: Март 6, 2025

Язык: Английский

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Advances in anammox process for municipal wastewater treatment plants: A review focusing on applied study and full-scale implementation cases

Critical Reviews in Environmental Science and Technology, Год журнала: 2025, Номер unknown, С. 1 - 24

Опубликована: Март 25, 2025

Язык: Английский

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Mitigating nitrous oxide emission by a down-flow hanging sponge bioprocess enabling the removal of high concentration N2O

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 162885 - 162885

Опубликована: Апрель 1, 2025

Язык: Английский

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Novel control strategy employing anaerobic/aerobic/anoxic/aerobic/anoxic mode to enhance endogenous denitrification and anammox for municipal wastewater treatment

Bioresource Technology, Год журнала: 2024, Номер unknown, С. 131565 - 131565

Опубликована: Окт. 1, 2024

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