Microbial Electrochemical Fluidized Bed Reactor: A Promising Solution for Removing Pollutants From Pharmaceutical Industrial Wastewater

The capacity of electroactive bacteria to exchange electrons with electroconductive materials has been explored during the last two decades as part of a new field called electromicrobiology. Such microbial metabolism has been validated to enhance the bioremediation of wastewater pollutants. In contr...

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Autores principales:	Yeray Asensio, María Llorente, Alejandro Sánchez-Gómez, Carlos Manchon, Karina Boltes, Abraham Esteve-Núñez
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	fluidized bed emerging contaminants pharmaceutical compounds removal wastewater treatment electroactive bacteria microbial electrochemical technologies Microbiology QR1-502
Acceso en línea:	https://doaj.org/article/d71e349a7d254bfba5b8314e65d64019
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id	oai:doaj.org-article:d71e349a7d254bfba5b8314e65d64019
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spelling	oai:doaj.org-article:d71e349a7d254bfba5b8314e65d640192021-12-01T07:32:11ZMicrobial Electrochemical Fluidized Bed Reactor: A Promising Solution for Removing Pollutants From Pharmaceutical Industrial Wastewater1664-302X10.3389/fmicb.2021.737112https://doaj.org/article/d71e349a7d254bfba5b8314e65d640192021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fmicb.2021.737112/fullhttps://doaj.org/toc/1664-302XThe capacity of electroactive bacteria to exchange electrons with electroconductive materials has been explored during the last two decades as part of a new field called electromicrobiology. Such microbial metabolism has been validated to enhance the bioremediation of wastewater pollutants. In contrast with standard materials like rods, plates, or felts made of graphite, we have explored the use of an alternative strategy using a fluid-like electrode as part of a microbial electrochemical fluidized bed reactor (ME-FBR). After verifying the low adsorption capacity of the pharmaceutical pollutants on the fluid-bed electrode [7.92 ± 0.05% carbamazepine (CBZ) and 9.42 ± 0.09% sulfamethoxazole (SMX)], our system showed a remarkable capacity to outperform classical solutions for removing pollutants (more than 80%) from the pharmaceutical industry like CBZ and SMX. Moreover, the ME-FBR performance revealed the impact of selecting an anode potential by efficiently removing both pollutants at + 200 mV. The high TOC removal efficiency also demonstrated that electrostimulation of electroactive bacteria in ME-FBR could overcome the expected microbial inhibition due to the presence of CBZ and SMX. Cyclic voltammograms revealed the successful electron transfer between microbial biofilm and the fluid-like electrode bed throughout the polarization tests. Finally, Vibrio fischeri-based ecotoxicity showed a 70% reduction after treating wastewater with a fluid-like anode (+ 400 mV), revealing the promising performance of this bioelectrochemical approach.Yeray AsensioMaría LlorenteAlejandro Sánchez-GómezCarlos ManchonKarina BoltesAbraham Esteve-NúñezAbraham Esteve-NúñezFrontiers Media S.A.articlefluidized bedemerging contaminantspharmaceutical compounds removalwastewater treatmentelectroactive bacteriamicrobial electrochemical technologiesMicrobiologyQR1-502ENFrontiers in Microbiology, Vol 12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	fluidized bed emerging contaminants pharmaceutical compounds removal wastewater treatment electroactive bacteria microbial electrochemical technologies Microbiology QR1-502
spellingShingle	fluidized bed emerging contaminants pharmaceutical compounds removal wastewater treatment electroactive bacteria microbial electrochemical technologies Microbiology QR1-502 Yeray Asensio María Llorente Alejandro Sánchez-Gómez Carlos Manchon Karina Boltes Abraham Esteve-Núñez Abraham Esteve-Núñez Microbial Electrochemical Fluidized Bed Reactor: A Promising Solution for Removing Pollutants From Pharmaceutical Industrial Wastewater
description	The capacity of electroactive bacteria to exchange electrons with electroconductive materials has been explored during the last two decades as part of a new field called electromicrobiology. Such microbial metabolism has been validated to enhance the bioremediation of wastewater pollutants. In contrast with standard materials like rods, plates, or felts made of graphite, we have explored the use of an alternative strategy using a fluid-like electrode as part of a microbial electrochemical fluidized bed reactor (ME-FBR). After verifying the low adsorption capacity of the pharmaceutical pollutants on the fluid-bed electrode [7.92 ± 0.05% carbamazepine (CBZ) and 9.42 ± 0.09% sulfamethoxazole (SMX)], our system showed a remarkable capacity to outperform classical solutions for removing pollutants (more than 80%) from the pharmaceutical industry like CBZ and SMX. Moreover, the ME-FBR performance revealed the impact of selecting an anode potential by efficiently removing both pollutants at + 200 mV. The high TOC removal efficiency also demonstrated that electrostimulation of electroactive bacteria in ME-FBR could overcome the expected microbial inhibition due to the presence of CBZ and SMX. Cyclic voltammograms revealed the successful electron transfer between microbial biofilm and the fluid-like electrode bed throughout the polarization tests. Finally, Vibrio fischeri-based ecotoxicity showed a 70% reduction after treating wastewater with a fluid-like anode (+ 400 mV), revealing the promising performance of this bioelectrochemical approach.
format	article
author	Yeray Asensio María Llorente Alejandro Sánchez-Gómez Carlos Manchon Karina Boltes Abraham Esteve-Núñez Abraham Esteve-Núñez
author_facet	Yeray Asensio María Llorente Alejandro Sánchez-Gómez Carlos Manchon Karina Boltes Abraham Esteve-Núñez Abraham Esteve-Núñez
author_sort	Yeray Asensio
title	Microbial Electrochemical Fluidized Bed Reactor: A Promising Solution for Removing Pollutants From Pharmaceutical Industrial Wastewater
title_short	Microbial Electrochemical Fluidized Bed Reactor: A Promising Solution for Removing Pollutants From Pharmaceutical Industrial Wastewater
title_full	Microbial Electrochemical Fluidized Bed Reactor: A Promising Solution for Removing Pollutants From Pharmaceutical Industrial Wastewater
title_fullStr	Microbial Electrochemical Fluidized Bed Reactor: A Promising Solution for Removing Pollutants From Pharmaceutical Industrial Wastewater
title_full_unstemmed	Microbial Electrochemical Fluidized Bed Reactor: A Promising Solution for Removing Pollutants From Pharmaceutical Industrial Wastewater
title_sort	microbial electrochemical fluidized bed reactor: a promising solution for removing pollutants from pharmaceutical industrial wastewater
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/d71e349a7d254bfba5b8314e65d64019
work_keys_str_mv	AT yerayasensio microbialelectrochemicalfluidizedbedreactorapromisingsolutionforremovingpollutantsfrompharmaceuticalindustrialwastewater AT mariallorente microbialelectrochemicalfluidizedbedreactorapromisingsolutionforremovingpollutantsfrompharmaceuticalindustrialwastewater AT alejandrosanchezgomez microbialelectrochemicalfluidizedbedreactorapromisingsolutionforremovingpollutantsfrompharmaceuticalindustrialwastewater AT carlosmanchon microbialelectrochemicalfluidizedbedreactorapromisingsolutionforremovingpollutantsfrompharmaceuticalindustrialwastewater AT karinaboltes microbialelectrochemicalfluidizedbedreactorapromisingsolutionforremovingpollutantsfrompharmaceuticalindustrialwastewater AT abrahamestevenunez microbialelectrochemicalfluidizedbedreactorapromisingsolutionforremovingpollutantsfrompharmaceuticalindustrialwastewater AT abrahamestevenunez microbialelectrochemicalfluidizedbedreactorapromisingsolutionforremovingpollutantsfrompharmaceuticalindustrialwastewater
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Microbial Electrochemical Fluidized Bed Reactor: A Promising Solution for Removing Pollutants From Pharmaceutical Industrial Wastewater

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