Salinity effect on denitrification efficiency with reed biomass addition in salt marsh wetlands

Bioresource Technology, Journal Year: 2023, Volume and Issue: 371, P. 128597 - 128597

Published: Jan. 9, 2023

Language: Английский

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The effect of aeration on treatment efficiency and bioenergy generation of septic-tank effluent in constructed wetland-microbial fuel cell

Journal of Water Process Engineering, Journal Year: 2023, Volume and Issue: 52, P. 103517 - 103517

Published: Feb. 1, 2023

This study examines the effect of different rates and modes supplementary aeration on treatment synthetic septic tank effluent in a lab-scale unplanted constructed wetland-microbial fuel cell (CW-MFC) along with bioenergy generation. The experiment was conducted 4 sequential phases; 1) operated no (NA), 2&3) cathode layer continuously aerated under (CA-I CA-II), 4) intermittently (IA). Results showed that dissolved oxygen gradient caused by IA formed aerobic anoxic zones CW-MFC promoted total nitrogen removal. best performance observed intermittent where maximum removal efficiencies COD (96.8 ± 3.3 %), TN (62.3 2.1 TKN (68.3 2.0 NH3 (64.8 2.3 %) were achieved. Furthermore, this efficiency corresponded enhanced generation regime, achieving power output (7.5 mW/m2), highest average voltage (0.399 0.02 V), Coulombic (1.94 normalized energy recovery (1.4 Wh/m3). Continuous aeration, however, induced an adverse due to excessive penetration into anode region. Nitrate accumulation also as sign incomplete denitrification process continuous regime. Overall, it can be concluded not only lowers operational costs but improves effectiveness terms effluent.

Language: Английский

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The electrode strategy and its coordination mechanism in constructed wetland-microbial fuel cell (CW-MFC): a review

Carbon Research, Journal Year: 2024, Volume and Issue: 3(1)

Published: Feb. 10, 2024

Abstract The electrode played an essential role in the operation of CW-MFC system due to its synergistic effect, and development strategy has promoted application since 2012. In this paper, according material quantity, types were distinctly divided into unified model, composited modified multi-electrodes model combined with non-conductive or conductive particle. Different strategies provided improve performance towards electricity generation, removal pollutants, control greenhouse gas emission, coordination mechanism was further reviewed. Furthermore, process summarized, low-cost, sustainable, innovated materials emphatically recommended. For scale-up application, multi-electrode systematically reviewed based on optimizing material, shape, spacing distance, connection type electrode. This review may provide guidance maximize advantages applications. Graphical

Language: Английский

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Sulfur-manganese carbonate composite autotrophic denitrification: nitrogen removal performance and biochemistry mechanism

Ecotoxicology and Environmental Safety, Journal Year: 2024, Volume and Issue: 272, P. 116048 - 116048

Published: Feb. 2, 2024

A novel composite sulfur-manganese carbonate autotrophic denitrification (SMAD) system was developed to reduce sulfate production and provide pH buffer function while improving efficiency without external organics. The average removal of total nitrogen (TN) 98.09% 96.29%, that NO3−-N 99.53% 97.77%, respectively, in the SMAD with a hydraulic retention time (HRT) 6 h 3 h. They were significantly higher than controls (quartz sand, manganese ore, sulfur systems). H+ produced by (SAD) process promoted release Mn2+ system. And this had stable no accumulation NO2−-N. decrease formation Mn oxides through electron donation confirmed presence (MAD) Dominant functional bacteria Thiobacillus, Chlorobium, Sulfurimonas, which linked nitrogen, sulfur, conversion denitrification. Meanwhile, Flavobacterium participating oxidation found only provided new strategy for advanced tailwater treatment.

Language: Английский

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Heterotrophic nitrification-aerobic denitrification performance of a novel strain, Pseudomonas sp. B-1, isolated from membrane aerated biofilm reactor

Environmental Research, Journal Year: 2022, Volume and Issue: 220, P. 115199 - 115199

Published: Dec. 31, 2022

Language: Английский

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Acorus calamus recycled as an additional carbon source in a microbial fuel cell-constructed wetland for enhanced nitrogen removal

Bioresource Technology, Journal Year: 2023, Volume and Issue: 384, P. 129324 - 129324

Published: June 12, 2023

Language: Английский

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Gaseous carbon and nitrogen emissions from microbial fuel cell-constructed wetlands with different carbon sources: Microbiota-driven mechanisms

Journal of Cleaner Production, Journal Year: 2023, Volume and Issue: 435, P. 140404 - 140404

Published: Dec. 29, 2023

Language: Английский

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Limited dissolved oxygen facilitated nitrogen removal at biocathode during the hydrogenotrophic denitrification process using bioelectrochemical system

Bioresource Technology, Journal Year: 2023, Volume and Issue: 372, P. 128662 - 128662

Published: Jan. 21, 2023

Language: Английский

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Iron-based multi-carbon composite and Pseudomonas furukawaii ZS1 co-affect nitrogen removal, microbial community dynamics and metabolism pathways in low-temperature aquaculture wastewater

Journal of Environmental Management, Journal Year: 2023, Volume and Issue: 349, P. 119471 - 119471

Published: Oct. 31, 2023

Language: Английский

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Nitrate reduction pathway of iron sulphides based MFC-CWs purifying low C/N wastewater: Competitive mechanism to inorganic and organic electrons

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 479, P. 147379 - 147379

Published: Nov. 23, 2023

Language: Английский

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