The salinity effects on the performance of a constructed wetland-microbial fuel cell

The objective of the present work is to study the influence of the wastewater salinity concentration on the performance of a Constructed Wetland-Microbial Fuel Cell (CW-MFC) for simultaneous water pollution control and electricity generation. The work has been carried out under the hypothesis that i...

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Authors: Villaseñor Camacho, José, Rodriguez, Luis, Fernández Marchante, Carmen María, Fernández Morales, Francisco Jesús, Rodrigo Rodrigo, Manuel Andrés
Format: article
Publication Date:2017
Country:España
Institution:Universidad de Castilla-La Mancha
Repository:RUIdeRA. Repositorio Institucional de la UCLM
OAI Identifier:oai:ruidera.uclm.es:10578/29156
Online Access:http://hdl.handle.net/10578/29156
Access Level:Open access
Keyword:Ingeniería Química
Humedal construido
Pila de combustible microbiana
Bioelectrogénico
Salinidad
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spelling The salinity effects on the performance of a constructed wetland-microbial fuel cellVillaseñor Camacho, JoséRodriguez, LuisFernández Marchante, Carmen MaríaFernández Morales, Francisco JesúsRodrigo Rodrigo, Manuel AndrésIngeniería QuímicaHumedal construidoPila de combustible microbianaBioelectrogénicoSalinidadThe objective of the present work is to study the influence of the wastewater salinity concentration on the performance of a Constructed Wetland-Microbial Fuel Cell (CW-MFC) for simultaneous water pollution control and electricity generation. The work has been carried out under the hypothesis that increasing the salinity may improve the electricity production because of a lower internal ohmic resistance, although it could damage the microbiological processes or the plants. A pilot-scale horizontal subsurface flow CW, modified to function as an MFC, was operated under a continuous operation mode over five consecutive experimental periods of approximately 2 months each. The wastewater salinity was increased in each new period by steeply increasing the NaCl concentration in the synthetic wastewater from 0.51 to 9.51 g L−1. The CW-MFC performance was monitored during every stationary period. The increasing salinity first improved the cell voltage, and the resultant maximum voltage (130 mV) under continuous operation corresponded to a salinity concentration between 4 and 5 g L−1. However, subsequently higher salinity levels caused the opposite effect. The maximum voltage was obtained in an unstable condition, as microbiological inhibition in the anode zone appeared early, at approximate salinity levels of only 3 g L−1. Batch experiments confirmed the results, and higher cell voltage values up to 600 mV were obtained if longer retention times were allowed. The wetland plants (Phragmites australis) were only damaged at a salinity concentration of 9.51 g L−1.El objetivo del presente trabajo es estudiar la influencia de la concentración de salinidad de las aguas residuales en el desempeño de una Celda de Combustible Microbiana-Humedal Construida (CW-MFC) para el control simultáneo de la contaminación del agua y la generación de electricidad. El trabajo se ha realizado bajo la hipótesis de que el aumento de la salinidad puede mejorar la producción de electricidad por una menor resistencia óhmica interna, aunque podría dañar los procesos microbiológicos o las plantas. Un CW de flujo subterráneo horizontal a escala piloto, modificado para funcionar como un MFC, se hizo funcionar bajo un modo de operación continua durante cinco períodos experimentales consecutivos de aproximadamente 2 meses cada uno. La salinidad de las aguas residuales se incrementó en cada nuevo período aumentando abruptamente la concentración de NaCl en las aguas residuales sintéticas de 0,51 a 9,51 g. L −1 . El rendimiento de CW-MFC se controló durante cada período estacionario. El aumento de la salinidad mejoró primero el voltaje de la celda, y el voltaje máximo resultante (130 mV) en funcionamiento continuo correspondió a una concentración de salinidad entre 4 y 5 g L -1 . Sin embargo, posteriormente, niveles más altos de salinidad provocaron el efecto contrario. El voltaje máximo se obtuvo en una condición inestable, ya que la inhibición microbiológica en la zona del ánodo apareció temprano, a niveles de salinidad aproximados de solo 3 g L -1 . Los experimentos por lotes confirmaron los resultados y se obtuvieron valores de voltaje de celda más altos de hasta 600 mV si se permitían tiempos de retención más largos. Las plantas de los humedales (Phragmites australis ) solo se dañaron a una concentración de salinidad de 9,51 g L -1 .Elsevier202120212017info:eu-repo/semantics/articleapplication/pdfapplication/pdfhttp://hdl.handle.net/10578/29156reponame:RUIdeRA. Repositorio Institucional de la UCLMinstname:Universidad de Castilla-La ManchaInglésinfo:eu-repo/semantics/openAccessoai:ruidera.uclm.es:10578/291562026-05-27T07:36:41Z
dc.title.none.fl_str_mv The salinity effects on the performance of a constructed wetland-microbial fuel cell
title The salinity effects on the performance of a constructed wetland-microbial fuel cell
spellingShingle The salinity effects on the performance of a constructed wetland-microbial fuel cell
Villaseñor Camacho, José
Ingeniería Química
Humedal construido
Pila de combustible microbiana
Bioelectrogénico
Salinidad
title_short The salinity effects on the performance of a constructed wetland-microbial fuel cell
title_full The salinity effects on the performance of a constructed wetland-microbial fuel cell
title_fullStr The salinity effects on the performance of a constructed wetland-microbial fuel cell
title_full_unstemmed The salinity effects on the performance of a constructed wetland-microbial fuel cell
title_sort The salinity effects on the performance of a constructed wetland-microbial fuel cell
dc.creator.none.fl_str_mv Villaseñor Camacho, José
Rodriguez, Luis
Fernández Marchante, Carmen María
Fernández Morales, Francisco Jesús
Rodrigo Rodrigo, Manuel Andrés
author Villaseñor Camacho, José
author_facet Villaseñor Camacho, José
Rodriguez, Luis
Fernández Marchante, Carmen María
Fernández Morales, Francisco Jesús
Rodrigo Rodrigo, Manuel Andrés
author_role author
author2 Rodriguez, Luis
Fernández Marchante, Carmen María
Fernández Morales, Francisco Jesús
Rodrigo Rodrigo, Manuel Andrés
author2_role author
author
author
author
dc.subject.none.fl_str_mv Ingeniería Química
Humedal construido
Pila de combustible microbiana
Bioelectrogénico
Salinidad
topic Ingeniería Química
Humedal construido
Pila de combustible microbiana
Bioelectrogénico
Salinidad
description The objective of the present work is to study the influence of the wastewater salinity concentration on the performance of a Constructed Wetland-Microbial Fuel Cell (CW-MFC) for simultaneous water pollution control and electricity generation. The work has been carried out under the hypothesis that increasing the salinity may improve the electricity production because of a lower internal ohmic resistance, although it could damage the microbiological processes or the plants. A pilot-scale horizontal subsurface flow CW, modified to function as an MFC, was operated under a continuous operation mode over five consecutive experimental periods of approximately 2 months each. The wastewater salinity was increased in each new period by steeply increasing the NaCl concentration in the synthetic wastewater from 0.51 to 9.51 g L−1. The CW-MFC performance was monitored during every stationary period. The increasing salinity first improved the cell voltage, and the resultant maximum voltage (130 mV) under continuous operation corresponded to a salinity concentration between 4 and 5 g L−1. However, subsequently higher salinity levels caused the opposite effect. The maximum voltage was obtained in an unstable condition, as microbiological inhibition in the anode zone appeared early, at approximate salinity levels of only 3 g L−1. Batch experiments confirmed the results, and higher cell voltage values up to 600 mV were obtained if longer retention times were allowed. The wetland plants (Phragmites australis) were only damaged at a salinity concentration of 9.51 g L−1.
publishDate 2017
dc.date.none.fl_str_mv 2017
2021
2021
dc.type.none.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10578/29156
url http://hdl.handle.net/10578/29156
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:RUIdeRA. Repositorio Institucional de la UCLM
instname:Universidad de Castilla-La Mancha
instname_str Universidad de Castilla-La Mancha
reponame_str RUIdeRA. Repositorio Institucional de la UCLM
collection RUIdeRA. Repositorio Institucional de la UCLM
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.300719

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