Saturated constructed wetland-microbial fuel cell system and effect on dissolved oxygen gradient, electricity generation and ammonium removal

The aim of this work was to assess effect of saturated constructed wetland-Microbial fuel cell system on dissolved oxygen gradient, electricity generation and ammonium removal. Two laboratory-scale systems, one planted with Schoenoplectus californicus (SCW1-MFC) and other without plant (SCW2-MFC), w...

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Published in:Environmental technology 2024, Vol.45 (4), p.624-638
Main Authors: González, Thais, Miranda, Juan Pablo, Gómez, Gloria, Puigagut, Jaume, Vidal, Gladys
Format: Article
Language:English
Subjects:
Ammonium
Ammonium Compounds
Artificial wetlands
Biochemical fuel cells
Bioelectric Energy Sources
Chemical oxygen demand
Circuits
Dissolved oxygen
Electricity
Electricity generation
Electrodes
fed-batch mode
Fuel cells
Fuel technology
gradient dissolved oxygen
Load distribution
Loading rate
Maximum power density
Microbial fuel cell
Microorganisms
Organic loading
Oxygen
Plants
saturated system
Wetlands
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cites cdi_FETCH-LOGICAL-c394t-625484cb0011f49ba0d35e37278bcba497c5f7293c5bfbfd256b3a48556c94d43
container_end_page 638
container_issue 4
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container_title Environmental technology
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creator González, Thais
Miranda, Juan Pablo
Gómez, Gloria
Puigagut, Jaume
Vidal, Gladys
description The aim of this work was to assess effect of saturated constructed wetland-Microbial fuel cell system on dissolved oxygen gradient, electricity generation and ammonium removal. Two laboratory-scale systems, one planted with Schoenoplectus californicus (SCW1-MFC) and other without plant (SCW2-MFC), were fed discontinuously with synthetic wastewater over 90 days. Both systems were operated at different organic loading rate (12 and 28 g COD/m 2 d) and ammonium loading rate (1.6 and 3.0 g NH 4 + - N/m 2 d) under open circuit and close circuit mode. The results indicate that between lower and upper zones of wetlands the average values were in the range of 1.22 ± 0.32 to 1.39 ± 0.27 mg O 2 /L in SCW1-MFC and 1.28 ± 0.24 to 1.56 ± 0.31 mg O 2 /L in SCW2-MFC. The effect of operating mode (closed and open circuit) and vegetation on DO was not significant (p > 0.05). Chemical oxygen demand (COD) removal efficiencies, fluctuated between 90 and 95% in the SCW1-MFC and 82 and 94% in the SCW2-MFC system. Regarding NH 4 + - N, removal efficiencies were above 85% in both systems reaching values maximus 98%. The maximum power density generated was 4 and 10 mW/m 2 in SCW1-MFC, while SCW2-MFC recorded the highest values (12 and 22 mW/m 2 ).
doi_str_mv 10.1080/09593330.2022.2119170
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Two laboratory-scale systems, one planted with Schoenoplectus californicus (SCW1-MFC) and other without plant (SCW2-MFC), were fed discontinuously with synthetic wastewater over 90 days. Both systems were operated at different organic loading rate (12 and 28 g COD/m 2 d) and ammonium loading rate (1.6 and 3.0 g NH 4 + - N/m 2 d) under open circuit and close circuit mode. The results indicate that between lower and upper zones of wetlands the average values were in the range of 1.22 ± 0.32 to 1.39 ± 0.27 mg O 2 /L in SCW1-MFC and 1.28 ± 0.24 to 1.56 ± 0.31 mg O 2 /L in SCW2-MFC. The effect of operating mode (closed and open circuit) and vegetation on DO was not significant (p &gt; 0.05). Chemical oxygen demand (COD) removal efficiencies, fluctuated between 90 and 95% in the SCW1-MFC and 82 and 94% in the SCW2-MFC system. Regarding NH 4 + - N, removal efficiencies were above 85% in both systems reaching values maximus 98%. 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ispartof Environmental technology, 2024, Vol.45 (4), p.624-638
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source Taylor and Francis Science and Technology Collection
subjects Ammonium
Ammonium Compounds
Artificial wetlands
Biochemical fuel cells
Bioelectric Energy Sources
Chemical oxygen demand
Circuits
Dissolved oxygen
Electricity
Electricity generation
Electrodes
fed-batch mode
Fuel cells
Fuel technology
gradient dissolved oxygen
Load distribution
Loading rate
Maximum power density
Microbial fuel cell
Microorganisms
Organic loading
Oxygen
Plants
saturated system
Wetlands
title Saturated constructed wetland-microbial fuel cell system and effect on dissolved oxygen gradient, electricity generation and ammonium removal
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