High-rate iron sulfide and sulfur-coupled autotrophic denitrification system: Nutrients removal performance and microbial characterization

Water Research, Journal Year: 2023, Volume and Issue: 231, P. 119619 - 119619

Published: Jan. 17, 2023

Iron sulfides-based autotrophic denitrification (IAD) is a promising technology for nitrate and phosphate removal from low C:N ratio wastewater due to its cost-effectiveness sludge production. However, the slow kinetics of IAD, compared other sulfur-based (SAD) processes, limits engineering application. This study constructed co-electron-donor (FeS S0 with volume 2:1) iron sulfur (ISAD) biofilter operated at as short 1 hr hydraulic retention time (HRT). Long-term operation results showed that superior total nitrogen removals ISAD were 90–100% 1–12 h HRT, highest rate up 960 mg/L/d. Considering sulfate production, HRT 3 could be optimal condition. Such performance in was achieved interactions between FeS S0, which accelerated process maintained acidity-alkalinity balance. Metagenomic analysis found enriched nitrate-dependent iron-oxidizing (NDFO) bacteria (Acinetobacter Acidovorax), sulfur-oxidizing (SOB), dissimilatory reduction ammonia (DNRA) likely supported stable reduction. The metabolic pathway completely DNRA, coupled oxidation, disproportionation, oxidation precipitation co-electron donors, responsible high-rate removal. provides potential highly efficient post-denitrification sheds light on balanced microbial S-N-Fe transformation.

Language: Английский

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Strengthening in microbiota dynamics and C, N, S transformation induced by novel synthesized pyrite/PHBV composites for advanced nitrogen and phosphate removal: Overlooked sulfate reduction process

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 463, P. 142315 - 142315

Published: March 9, 2023

Language: Английский

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Enhanced adaptability of pyrite-based constructed wetlands for low carbon to nitrogen ratio wastewater treatments: Modulation of nitrogen removal mechanisms and reduction of carbon emissions

Bioresource Technology, Journal Year: 2024, Volume and Issue: 395, P. 130348 - 130348

Published: Jan. 17, 2024

Language: Английский

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Significantly Enhanced Nitrate and Phosphorus Removal by Pyrite/Sawdust Composite-Driven Mixotrophic Denitrification with Boosted Electron Transfer: Comprehensive Evaluation of Water–Gas–Biofilm Phases during a Long-Term Study

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: 58(23), P. 10149 - 10161

Published: May 29, 2024

Further reducing total nitrogen (TN) and phosphorus (TP) in the secondary effluent needs to be realized effectively an eco-friendly manner. Herein, four pyrite/sawdust composite-based biofilters were established treat simulated for 304 days. The results demonstrated that TN TP concentrations from under optimal hydraulic retention time (HRT) of 3.5 h stable at <2.0 0.1 mg/L, respectively, no significant differences observed between inoculated sludge sources. had low N2O, CH4, CO2 emissions, effluent's DOM was mainly composed five fluorescence components. Moreover, mixotrophic denitrifiers (Thiothrix) sulfate-reducing bacteria (Desulfosporosinus) contributing microbial sulfur cycles enriched biofilm. Co-occurrence network analysis deciphered Chlorobaculum Desulfobacterales key genera, which formed obvious cycle process strengthened denitrification capacity. higher abundances genes encoding extracellular electron transport (EET) chains/mediators revealed pyrite not only functioned as conduit stimulate direct interspecies transfer by flagella but also facilitated EET-associated enzymes denitrification. This study comprehensively evaluates water–gas–biofilm phases during a long-term study, providing in-depth understanding boosted pyrite-based systems.

Language: Английский

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Microbial interactions elucidate the mechanisms of hydraulic retention time altering denitrification pathway in a sole pyrite-based electrochemical bioreactor (PEBR)

Journal of Environmental Management, Journal Year: 2025, Volume and Issue: 376, P. 124467 - 124467

Published: Feb. 8, 2025

Language: Английский

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A comprehensive review on mixotrophic denitrification processes for biological nitrogen removal

Chemosphere, Journal Year: 2022, Volume and Issue: 313, P. 137474 - 137474

Published: Dec. 6, 2022

Language: Английский

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Quantification of enhanced nitrogen removal pathways of pyrite interaction with anammox sludge system

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 459, P. 141519 - 141519

Published: Jan. 20, 2023

Language: Английский

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Recent advancements in biosynthesis, industrial production, and environmental applications of polyhydroxyalkanoates (PHAs): A review

Bioresource Technology Reports, Journal Year: 2024, Volume and Issue: 27, P. 101957 - 101957

Published: Sept. 1, 2024

Language: Английский

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Application of pilot-scale two-stage ZVI-based biofilter for advanced nitrogen and phosphorus removal from the actual secondary effluent under high DO conditions: Focusing on the effect of DO on electron transfer and Fe cycle

Journal of Cleaner Production, Journal Year: 2025, Volume and Issue: unknown, P. 144892 - 144892

Published: Jan. 1, 2025

Language: Английский

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The enrichment of more functional microbes induced by the increasing hydraulic retention time accounts for the increment of autotrophic denitrification performance

Environmental Research, Journal Year: 2023, Volume and Issue: 236, P. 116848 - 116848

Published: Aug. 7, 2023

Language: Английский

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