The effect of flow modes and electrode combinations on the performance of a multiple module microbial fuel cell installed at wastewater treatment plant

Weihua He, Maxwell J. Wallack, Kyoung Yeol Kim, Xiaoyuan Zhang, Wulin Yang, Xiuping Zhu, Yujie Feng, Bruce Ernest Logan

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

A larger (6.1 L) MFC stack made in a scalable configuration was constructed with four anode modules and three (two-sided) cathode modules, and tested at a wastewater treatment plant for performance in terms of chemical oxygen demand (COD) removal and power generation. Domestic wastewater was fed either in parallel (raw wastewater to each individual anode module) or series (sequentially through the chambers), with the flow direction either alternated every one or two days or kept fixed in a single direction over time. The largest impact on performance was the wastewater COD concentration, which greatly impacted power production, but did not affect the percentage of COD removal. With higher COD concentrations (∼500 mg L −1 ) and alternating flow conditions, power generation was primarily limited by the cathode specific area. In alternating flow operation, anode modules connected to two cathodes produced an average maximum power density of 6.0 ± 0.4 W m −3 , which was 1.9 ± 0.2 times that obtained for anodes connected to a single cathode. In fixed flow operation, a large subsequent decrease in COD influent concentration greatly reduced power production independent of reactor operation in parallel or serial flow modes. Anode modules connected to two cathodes did not consistently produce more power than the anodes connected to a single cathode, indicating power production became limited by restricted anode performance at low CODs. Cyclic voltammetry and electrochemical impedance spectroscopy data supported restricted anode performance with low COD. These results demonstrate that maintaining power production of MFC stack requires higher influent and effluent COD concentrations. However, overall performance of the MFC in terms of COD removal was not affected by operational modes.

Original languageEnglish (US)
Pages (from-to)351-360
Number of pages10
JournalWater Research
Volume105
DOIs
StatePublished - Nov 15 2016

Fingerprint

Microbial fuel cells
Chemical oxygen demand
fuel cell
Wastewater treatment
chemical oxygen demand
Anodes
electrode
Electrodes
Cathodes
Wastewater
power generation
wastewater
Power generation
Reactor operation
wastewater treatment plant
effect
Electrochemical impedance spectroscopy
Cyclic voltammetry
Effluents
spectroscopy

All Science Journal Classification (ASJC) codes

  • Ecological Modeling
  • Water Science and Technology
  • Waste Management and Disposal
  • Pollution

Cite this

He, Weihua ; Wallack, Maxwell J. ; Kim, Kyoung Yeol ; Zhang, Xiaoyuan ; Yang, Wulin ; Zhu, Xiuping ; Feng, Yujie ; Logan, Bruce Ernest. / The effect of flow modes and electrode combinations on the performance of a multiple module microbial fuel cell installed at wastewater treatment plant. In: Water Research. 2016 ; Vol. 105. pp. 351-360.
@article{1ccf989ead504cecadc3f591a2ae0941,
title = "The effect of flow modes and electrode combinations on the performance of a multiple module microbial fuel cell installed at wastewater treatment plant",
abstract = "A larger (6.1 L) MFC stack made in a scalable configuration was constructed with four anode modules and three (two-sided) cathode modules, and tested at a wastewater treatment plant for performance in terms of chemical oxygen demand (COD) removal and power generation. Domestic wastewater was fed either in parallel (raw wastewater to each individual anode module) or series (sequentially through the chambers), with the flow direction either alternated every one or two days or kept fixed in a single direction over time. The largest impact on performance was the wastewater COD concentration, which greatly impacted power production, but did not affect the percentage of COD removal. With higher COD concentrations (∼500 mg L −1 ) and alternating flow conditions, power generation was primarily limited by the cathode specific area. In alternating flow operation, anode modules connected to two cathodes produced an average maximum power density of 6.0 ± 0.4 W m −3 , which was 1.9 ± 0.2 times that obtained for anodes connected to a single cathode. In fixed flow operation, a large subsequent decrease in COD influent concentration greatly reduced power production independent of reactor operation in parallel or serial flow modes. Anode modules connected to two cathodes did not consistently produce more power than the anodes connected to a single cathode, indicating power production became limited by restricted anode performance at low CODs. Cyclic voltammetry and electrochemical impedance spectroscopy data supported restricted anode performance with low COD. These results demonstrate that maintaining power production of MFC stack requires higher influent and effluent COD concentrations. However, overall performance of the MFC in terms of COD removal was not affected by operational modes.",
author = "Weihua He and Wallack, {Maxwell J.} and Kim, {Kyoung Yeol} and Xiaoyuan Zhang and Wulin Yang and Xiuping Zhu and Yujie Feng and Logan, {Bruce Ernest}",
year = "2016",
month = "11",
day = "15",
doi = "10.1016/j.watres.2016.09.008",
language = "English (US)",
volume = "105",
pages = "351--360",
journal = "Water Research",
issn = "0043-1354",
publisher = "Elsevier Limited",

}

The effect of flow modes and electrode combinations on the performance of a multiple module microbial fuel cell installed at wastewater treatment plant. / He, Weihua; Wallack, Maxwell J.; Kim, Kyoung Yeol; Zhang, Xiaoyuan; Yang, Wulin; Zhu, Xiuping; Feng, Yujie; Logan, Bruce Ernest.

In: Water Research, Vol. 105, 15.11.2016, p. 351-360.

Research output: Contribution to journalArticle

TY - JOUR

T1 - The effect of flow modes and electrode combinations on the performance of a multiple module microbial fuel cell installed at wastewater treatment plant

AU - He, Weihua

AU - Wallack, Maxwell J.

AU - Kim, Kyoung Yeol

AU - Zhang, Xiaoyuan

AU - Yang, Wulin

AU - Zhu, Xiuping

AU - Feng, Yujie

AU - Logan, Bruce Ernest

PY - 2016/11/15

Y1 - 2016/11/15

N2 - A larger (6.1 L) MFC stack made in a scalable configuration was constructed with four anode modules and three (two-sided) cathode modules, and tested at a wastewater treatment plant for performance in terms of chemical oxygen demand (COD) removal and power generation. Domestic wastewater was fed either in parallel (raw wastewater to each individual anode module) or series (sequentially through the chambers), with the flow direction either alternated every one or two days or kept fixed in a single direction over time. The largest impact on performance was the wastewater COD concentration, which greatly impacted power production, but did not affect the percentage of COD removal. With higher COD concentrations (∼500 mg L −1 ) and alternating flow conditions, power generation was primarily limited by the cathode specific area. In alternating flow operation, anode modules connected to two cathodes produced an average maximum power density of 6.0 ± 0.4 W m −3 , which was 1.9 ± 0.2 times that obtained for anodes connected to a single cathode. In fixed flow operation, a large subsequent decrease in COD influent concentration greatly reduced power production independent of reactor operation in parallel or serial flow modes. Anode modules connected to two cathodes did not consistently produce more power than the anodes connected to a single cathode, indicating power production became limited by restricted anode performance at low CODs. Cyclic voltammetry and electrochemical impedance spectroscopy data supported restricted anode performance with low COD. These results demonstrate that maintaining power production of MFC stack requires higher influent and effluent COD concentrations. However, overall performance of the MFC in terms of COD removal was not affected by operational modes.

AB - A larger (6.1 L) MFC stack made in a scalable configuration was constructed with four anode modules and three (two-sided) cathode modules, and tested at a wastewater treatment plant for performance in terms of chemical oxygen demand (COD) removal and power generation. Domestic wastewater was fed either in parallel (raw wastewater to each individual anode module) or series (sequentially through the chambers), with the flow direction either alternated every one or two days or kept fixed in a single direction over time. The largest impact on performance was the wastewater COD concentration, which greatly impacted power production, but did not affect the percentage of COD removal. With higher COD concentrations (∼500 mg L −1 ) and alternating flow conditions, power generation was primarily limited by the cathode specific area. In alternating flow operation, anode modules connected to two cathodes produced an average maximum power density of 6.0 ± 0.4 W m −3 , which was 1.9 ± 0.2 times that obtained for anodes connected to a single cathode. In fixed flow operation, a large subsequent decrease in COD influent concentration greatly reduced power production independent of reactor operation in parallel or serial flow modes. Anode modules connected to two cathodes did not consistently produce more power than the anodes connected to a single cathode, indicating power production became limited by restricted anode performance at low CODs. Cyclic voltammetry and electrochemical impedance spectroscopy data supported restricted anode performance with low COD. These results demonstrate that maintaining power production of MFC stack requires higher influent and effluent COD concentrations. However, overall performance of the MFC in terms of COD removal was not affected by operational modes.

UR - http://www.scopus.com/inward/record.url?scp=84987984546&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84987984546&partnerID=8YFLogxK

U2 - 10.1016/j.watres.2016.09.008

DO - 10.1016/j.watres.2016.09.008

M3 - Article

C2 - 27639344

AN - SCOPUS:84987984546

VL - 105

SP - 351

EP - 360

JO - Water Research

JF - Water Research

SN - 0043-1354

ER -