Advances in microbially mediated manganese redox cycling coupled with nitrogen removal in wastewater treatment: A critical review and bibliometric analysis

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 461, P. 141878 - 141878

Published: Feb. 14, 2023

Language: Английский

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Enhanced Anaerobic Wastewater Treatment by a Binary Electroactive Material: Pseudocapacitance/Conductance-Mediated Microbial Interspecies Electron Transfer

Environmental Science & Technology, Journal Year: 2023, Volume and Issue: 57(32), P. 12072 - 12082

Published: July 24, 2023

Anaerobic digestion (AD) is a promising method to treat organic matter. However, AD performance was limited by the inefficient electron transfer and metabolism imbalance between acid-producing bacteria methanogens. In this study, novel binary electroactive material (Fe3O4@biochar) with pseudocapacitance (1.4 F/g) conductance (10.2 μS/cm) exploited store-release electrons as well enhance direct methanogens during process. The mechanism of pseudocapacitance/conductance on mediating interspecies deeply studied at each stage AD. hydrolysis acidification stage, Fe3O4@biochar acting acceptors proceeded NADH/NAD+ transformation promote ATP synthesis 21% which supported energy for organics decomposition. methanogenesis helped microbes establish (DIET) increase coenzyme F420 content 66% then improve methane production 13%. complete experiment, generated from were rapidly transported via conductors. Excess buffered pseudocapacitor gradually released alleviated drastic drop in pH. These findings provided strategy anaerobic treatment guided design materials.

Language: Английский

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Aerobic Denitrification Enhanced by Immobilized Slow-Released Iron/Activated Carbon Aquagel Treatment of Low C/N Micropolluted Water: Denitrification Performance, Denitrifying Bacterial Community Co-occurrence, and Implications

Environmental Science & Technology, Journal Year: 2023, Volume and Issue: 57(13), P. 5252 - 5263

Published: March 21, 2023

The key limiting factors in the treatment of low C/N micropolluted water bodies are deficient essential electron donors for nitrogen removal processes. An iron/activated carbon aquagel (IACA) was synthesized as a slowly released inorganic donor to enhance aerobic denitrification performance treatment. efficiency IACA reactors enhanced by more than 56.72% and highest 94.12% accomplished compared with those control reactors. Moreover, CODMn improved 34.32% Illumina MiSeq sequencing consequence explained that denitrifying bacteria facultative denitrification, iron oxidation, reduction function were located dominant species niches (e.g., Pseudomonas, Leptothrix, Comamonas). diversity richness bacterial communities Network analysis indicated consortia presented complicated co-occurrence structure. potential long-term operation. This study affords pathway utilize IACA, promoting during body

Language: Английский

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Simultaneous removal of nitrate, oxytetracycline and copper by ferrous-manganese co-driven immobilized bioreactor

Journal of Hazardous Materials, Journal Year: 2024, Volume and Issue: 466, P. 133621 - 133621

Published: Jan. 26, 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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Tracing the electron transfer behavior driven by hydrophyte-derived carbon materials empowered autotrophic denitrification in iron-based constructed wetlands: Efficacy and enhancement mechanism

Water Research, Journal Year: 2025, Volume and Issue: 275, P. 123169 - 123169

Published: Jan. 21, 2025

Language: Английский

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Chitosan and carboxymethyl chitosan mimic biomineralization and promote microbially induced calcium precipitation

Carbohydrate Polymers, Journal Year: 2022, Volume and Issue: 287, P. 119335 - 119335

Published: March 9, 2022

Language: Английский

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Performance of hydrogel immobilized bioreactors combined with different iron ore wastes for denitrification and removal of copper and lead: Optimization and possible mechanism

Water Research, Journal Year: 2022, Volume and Issue: 225, P. 119196 - 119196

Published: Oct. 1, 2022

Language: Английский

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Enhanced nitrate, manganese, and phenol removal by polyvinyl alcohol/sodium alginate with biochar gel beads immobilized bioreactor: Performance, mechanism, and bacterial diversity

Bioresource Technology, Journal Year: 2022, Volume and Issue: 348, P. 126818 - 126818

Published: Feb. 6, 2022

Language: Английский

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Magnetite-loaded rice husk biochar promoted the denitrification performance of Aquabacterium sp. XL4 under low carbon to nitrogen ratio: Optimization and mechanism

Bioresource Technology, Journal Year: 2022, Volume and Issue: 348, P. 126802 - 126802

Published: Feb. 4, 2022

Language: Английский

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