Increasing removal of benzene from groundwater using stacked tubular air-cathode microbial fuel cells

Shu Hui Liu, Chi-Yung Lai, Jhe Wei Ye, Chi Wen Lin

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

This work develops a small-scale microbial fuel cell (MFC) and evaluates their performance in series or in parallel as a tubular MFC (t-MFC) in removing benzene from groundwater and generating electricity. The results indicate that the time required (tr) for t-MFC to remove all benzene was half of that required by a single MFC. The maximum power density (Pmax) of the serially-connected t-MFC was 12.7 mW/m2, a 3.3-fold increase over the single t-MFC. An optimal benzene removal efficiency with a tr of four days was achieved under persistent aeration at the cathode of the t-MFC, and this tr was 1.25–3-fold lower than those obtained under other aeration conditions. Tubular MFCs connected in series had a higher open-circuited voltage (655 mV) and a lower tr, but the Pmax and maximum current density of the parallelly-connected t-MFC were 3.8 and 1.5 times those of the t-MFC with a serial connection. Intermittent aerating of the cathode improved the removal of benzene and the generation of electricity in a t-MFC by providing sufficient levels of oxygen for the reaction to achieve Pmax. The small t-MFC was easily scaled up by stacking MFCs in series mode, with great potential for field-scale application for in situ bioremediation in hydrocarbon-contaminated groundwater.

Original languageEnglish
Pages (from-to)78-84
Number of pages7
JournalJournal of Cleaner Production
Volume194
DOIs
Publication statusPublished - 2018 Sep 1

Fingerprint

Microbial fuel cells
fuel cell
benzene
Groundwater
Benzene
Cathodes
groundwater
air
Air
aeration
electricity
Electricity
fold
Bioremediation
density current
stacking
bioremediation
Current density
Hydrocarbons
hydrocarbon

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Environmental Science(all)
  • Strategy and Management
  • Industrial and Manufacturing Engineering

Cite this

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abstract = "This work develops a small-scale microbial fuel cell (MFC) and evaluates their performance in series or in parallel as a tubular MFC (t-MFC) in removing benzene from groundwater and generating electricity. The results indicate that the time required (tr) for t-MFC to remove all benzene was half of that required by a single MFC. The maximum power density (Pmax) of the serially-connected t-MFC was 12.7 mW/m2, a 3.3-fold increase over the single t-MFC. An optimal benzene removal efficiency with a tr of four days was achieved under persistent aeration at the cathode of the t-MFC, and this tr was 1.25–3-fold lower than those obtained under other aeration conditions. Tubular MFCs connected in series had a higher open-circuited voltage (655 mV) and a lower tr, but the Pmax and maximum current density of the parallelly-connected t-MFC were 3.8 and 1.5 times those of the t-MFC with a serial connection. Intermittent aerating of the cathode improved the removal of benzene and the generation of electricity in a t-MFC by providing sufficient levels of oxygen for the reaction to achieve Pmax. The small t-MFC was easily scaled up by stacking MFCs in series mode, with great potential for field-scale application for in situ bioremediation in hydrocarbon-contaminated groundwater.",
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Increasing removal of benzene from groundwater using stacked tubular air-cathode microbial fuel cells. / Liu, Shu Hui; Lai, Chi-Yung; Ye, Jhe Wei; Lin, Chi Wen.

In: Journal of Cleaner Production, Vol. 194, 01.09.2018, p. 78-84.

Research output: Contribution to journalArticle

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