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Simultaneous removal of organic matter and nitrogen compounds by partitioned aeration in a 226 L-scale microbial fuel cell

Although microbial fuel cells (MFCs) have been widely studied as wastewater treatment technologies that convert organic matter to electricity, there are few reports of large-scale MFCs that treat both organic matter and nitrogen compounds. In this study, a 226 L reactor equipped with 27 MFC units wa...

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Autores principales: Yamane, Taiki, Yoshida, Naoko, Sugioka, Mari
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9115875/
https://www.ncbi.nlm.nih.gov/pubmed/35702426
http://dx.doi.org/10.1039/d2ra01485h
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author Yamane, Taiki
Yoshida, Naoko
Sugioka, Mari
author_facet Yamane, Taiki
Yoshida, Naoko
Sugioka, Mari
author_sort Yamane, Taiki
collection PubMed
description Although microbial fuel cells (MFCs) have been widely studied as wastewater treatment technologies that convert organic matter to electricity, there are few reports of large-scale MFCs that treat both organic matter and nitrogen compounds. In this study, a 226 L reactor equipped with 27 MFC units was partially aerated at 10% of its total volume. The MFC unit consists of a cylindrical air core covered with a carbon-based air cathode, an anion exchange membrane, and a graphite non-woven fabric anode. The air-cathode MFC with 13 L min(−1) aeration rate produced a current density of 0.0012–0.15 A m(−2) with 40 to >93% biological oxygen demand (BOD) removal to have an effluent BOD of <5–36 mg L(−1) at a hydraulic retention time (HRT) of 12–47 h. Meanwhile, 55 ± 17% of the total nitrogen (TN) was removed, resulting in 9.7 ± 3.8 mg L(−1) TN in the effluent, although the TN removal was limited at ≥20 °C. The mono-exponential regression for BOD and TN (≥20 °C) estimated that an HRT of 21 h could meet the Japanese effluent quality standards of BOD and TN. Calculation of the total energy recovered via current generation and energy consumed by aeration suggested an energy consumption of 0.22 kW h m(−3). Decreasing the aeration rate and HRT in the reactor would further reduce energy consumption and increase energy production.
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spelling pubmed-91158752022-06-13 Simultaneous removal of organic matter and nitrogen compounds by partitioned aeration in a 226 L-scale microbial fuel cell Yamane, Taiki Yoshida, Naoko Sugioka, Mari RSC Adv Chemistry Although microbial fuel cells (MFCs) have been widely studied as wastewater treatment technologies that convert organic matter to electricity, there are few reports of large-scale MFCs that treat both organic matter and nitrogen compounds. In this study, a 226 L reactor equipped with 27 MFC units was partially aerated at 10% of its total volume. The MFC unit consists of a cylindrical air core covered with a carbon-based air cathode, an anion exchange membrane, and a graphite non-woven fabric anode. The air-cathode MFC with 13 L min(−1) aeration rate produced a current density of 0.0012–0.15 A m(−2) with 40 to >93% biological oxygen demand (BOD) removal to have an effluent BOD of <5–36 mg L(−1) at a hydraulic retention time (HRT) of 12–47 h. Meanwhile, 55 ± 17% of the total nitrogen (TN) was removed, resulting in 9.7 ± 3.8 mg L(−1) TN in the effluent, although the TN removal was limited at ≥20 °C. The mono-exponential regression for BOD and TN (≥20 °C) estimated that an HRT of 21 h could meet the Japanese effluent quality standards of BOD and TN. Calculation of the total energy recovered via current generation and energy consumed by aeration suggested an energy consumption of 0.22 kW h m(−3). Decreasing the aeration rate and HRT in the reactor would further reduce energy consumption and increase energy production. The Royal Society of Chemistry 2022-05-18 /pmc/articles/PMC9115875/ /pubmed/35702426 http://dx.doi.org/10.1039/d2ra01485h Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/
spellingShingle Chemistry
Yamane, Taiki
Yoshida, Naoko
Sugioka, Mari
Simultaneous removal of organic matter and nitrogen compounds by partitioned aeration in a 226 L-scale microbial fuel cell
title Simultaneous removal of organic matter and nitrogen compounds by partitioned aeration in a 226 L-scale microbial fuel cell
title_full Simultaneous removal of organic matter and nitrogen compounds by partitioned aeration in a 226 L-scale microbial fuel cell
title_fullStr Simultaneous removal of organic matter and nitrogen compounds by partitioned aeration in a 226 L-scale microbial fuel cell
title_full_unstemmed Simultaneous removal of organic matter and nitrogen compounds by partitioned aeration in a 226 L-scale microbial fuel cell
title_short Simultaneous removal of organic matter and nitrogen compounds by partitioned aeration in a 226 L-scale microbial fuel cell
title_sort simultaneous removal of organic matter and nitrogen compounds by partitioned aeration in a 226 l-scale microbial fuel cell
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9115875/
https://www.ncbi.nlm.nih.gov/pubmed/35702426
http://dx.doi.org/10.1039/d2ra01485h
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AT sugiokamari simultaneousremovaloforganicmatterandnitrogencompoundsbypartitionedaerationina226lscalemicrobialfuelcell