Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

Refractory azo dye wastewater treatment by combined process of microbial electrolytic reactor and plant-microbial fuel cell

Liu, Shentan ; Wang, Zuo ; Feng, Xiaojuan and Pyo, Sang Hyun LU (2023) In Environmental Research 216.
Abstract

An innovative design of microbial electrolytic reactor (MER) coupled with Ipomoea aquatica Forsk. plant microbial fuel cell (IAF-PMFC) was developed for azo dye wastewater treatment and electricity generation. This study aims to assess the sequential degradation of azo dye and the feasibility of energy self-sufficiency in the MER/IAF-PMFC system. The decomposition of azo dye into aromatic amines and dye decolorization occurred in the MER at high hydraulic loading of 0.28 m3/(m2·d), while dye intermediates were mainly mineralized in the IAF-PMFC at low hydraulic loading of 0.06 m3/(m2·d). The final decolorization efficiency and COD removal of the combined system reached 99.64% and 92.06%... (More)

An innovative design of microbial electrolytic reactor (MER) coupled with Ipomoea aquatica Forsk. plant microbial fuel cell (IAF-PMFC) was developed for azo dye wastewater treatment and electricity generation. This study aims to assess the sequential degradation of azo dye and the feasibility of energy self-sufficiency in the MER/IAF-PMFC system. The decomposition of azo dye into aromatic amines and dye decolorization occurred in the MER at high hydraulic loading of 0.28 m3/(m2·d), while dye intermediates were mainly mineralized in the IAF-PMFC at low hydraulic loading of 0.06 m3/(m2·d). The final decolorization efficiency and COD removal of the combined system reached 99.64% and 92.06% respectively, even at influent dye concentration of 1000 mg/L. The effects of open/closed circuit conditions, presence/absence of aquatic plant and different cathode areas on the performance of the IAF-PMFC for treating the effluent of the MER were systematically tested, and the results showed that closed-circuit condition, plant involvement and larger cathode area were more beneficial to decolorization, detoxification and mineralization of dye wastewater, bioelectricity output, plant growth and photosynthetic rate. The power consumption by the MER was 0.0163 kWh/m3 of dye wastewater, while the highest power generation of the IAF-PMFC reached 0.0183 kWh/m3. The current efficiency of the MER for dye decolorization was as high as 942.83%, while the maximum coulombic efficiency of the IAF-PMFC for intermediates metabolism was only 6.30%, which still had much space of bioelectricity generation promotion. The MER/IAF-PMFC technology can simultaneously realize refractory wastewater treatment and balance of electricity production and consumption.

(Less)
Please use this url to cite or link to this publication:
author
; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Azo dye, Biodegradation, Bioelectricity, Microbial fuel cell, Wastewater
in
Environmental Research
volume
216
article number
114625
publisher
Elsevier
external identifiers
  • pmid:36279915
  • scopus:85140446481
ISSN
0013-9351
DOI
10.1016/j.envres.2022.114625
language
English
LU publication?
yes
id
c512794f-a44f-4765-9cb8-248d9db1237f
date added to LUP
2023-01-23 13:49:48
date last changed
2024-04-30 13:48:08
@article{c512794f-a44f-4765-9cb8-248d9db1237f,
  abstract     = {{<p>An innovative design of microbial electrolytic reactor (MER) coupled with Ipomoea aquatica Forsk. plant microbial fuel cell (IAF-PMFC) was developed for azo dye wastewater treatment and electricity generation. This study aims to assess the sequential degradation of azo dye and the feasibility of energy self-sufficiency in the MER/IAF-PMFC system. The decomposition of azo dye into aromatic amines and dye decolorization occurred in the MER at high hydraulic loading of 0.28 m<sup>3</sup>/(m<sup>2</sup>·d), while dye intermediates were mainly mineralized in the IAF-PMFC at low hydraulic loading of 0.06 m<sup>3</sup>/(m<sup>2</sup>·d). The final decolorization efficiency and COD removal of the combined system reached 99.64% and 92.06% respectively, even at influent dye concentration of 1000 mg/L. The effects of open/closed circuit conditions, presence/absence of aquatic plant and different cathode areas on the performance of the IAF-PMFC for treating the effluent of the MER were systematically tested, and the results showed that closed-circuit condition, plant involvement and larger cathode area were more beneficial to decolorization, detoxification and mineralization of dye wastewater, bioelectricity output, plant growth and photosynthetic rate. The power consumption by the MER was 0.0163 kWh/m<sup>3</sup> of dye wastewater, while the highest power generation of the IAF-PMFC reached 0.0183 kWh/m<sup>3</sup>. The current efficiency of the MER for dye decolorization was as high as 942.83%, while the maximum coulombic efficiency of the IAF-PMFC for intermediates metabolism was only 6.30%, which still had much space of bioelectricity generation promotion. The MER/IAF-PMFC technology can simultaneously realize refractory wastewater treatment and balance of electricity production and consumption.</p>}},
  author       = {{Liu, Shentan and Wang, Zuo and Feng, Xiaojuan and Pyo, Sang Hyun}},
  issn         = {{0013-9351}},
  keywords     = {{Azo dye; Biodegradation; Bioelectricity; Microbial fuel cell; Wastewater}},
  language     = {{eng}},
  month        = {{01}},
  publisher    = {{Elsevier}},
  series       = {{Environmental Research}},
  title        = {{Refractory azo dye wastewater treatment by combined process of microbial electrolytic reactor and plant-microbial fuel cell}},
  url          = {{http://dx.doi.org/10.1016/j.envres.2022.114625}},
  doi          = {{10.1016/j.envres.2022.114625}},
  volume       = {{216}},
  year         = {{2023}},
}