Simultaneous water desalination and electricity generation in a microbial desalination cell with electrolyte recirculation for pH control

Youpeng Qu, Yujie Feng, Xin Wang, Jia Liu, Jiangwei Lv, Weihua He, Bruce Ernest Logan

Research output: Contribution to journalArticle

90 Citations (Scopus)

Abstract

A recirculation microbial desalination cell (rMDC) was designed and operated to allow recirculation of solutions between the anode and cathode chambers. This recirculation avoided pH imbalances that could inhibit bacterial metabolism. The maximum power density was 931±29mW/m 2 with a 50mM phosphate buffer solution (PBS) and 776±30mW/m 2 with 25mM PBS. These power densities were higher than those obtained without recirculation of 698±10mW/m 2 (50mM PBS) and 508±11mW/m 2 (25mM PBS). The salt solution (20g/L NaCl) was reduced in salinity by 34±1% (50mM) and 37±2% (25mM) with recirculation (rMDC), and by 39±1% (50mM) and 25±3% (25mM) without recirculation (MDC). These results show that electrolyte recirculation using an rMDC is an effective method to increase power and achieve efficient desalination by eliminating pH imbalances.

Original languageEnglish (US)
Pages (from-to)89-94
Number of pages6
JournalBioresource technology
Volume106
DOIs
StatePublished - Feb 1 2012

Fingerprint

electricity generation
Desalination
desalination
electrolyte
Electrolytes
Electricity
Water
Buffers
Phosphates
phosphate
Metabolism
water desalination
Anodes
Cathodes
Salts
metabolism
salt
salinity

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

Cite this

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abstract = "A recirculation microbial desalination cell (rMDC) was designed and operated to allow recirculation of solutions between the anode and cathode chambers. This recirculation avoided pH imbalances that could inhibit bacterial metabolism. The maximum power density was 931±29mW/m 2 with a 50mM phosphate buffer solution (PBS) and 776±30mW/m 2 with 25mM PBS. These power densities were higher than those obtained without recirculation of 698±10mW/m 2 (50mM PBS) and 508±11mW/m 2 (25mM PBS). The salt solution (20g/L NaCl) was reduced in salinity by 34±1{\%} (50mM) and 37±2{\%} (25mM) with recirculation (rMDC), and by 39±1{\%} (50mM) and 25±3{\%} (25mM) without recirculation (MDC). These results show that electrolyte recirculation using an rMDC is an effective method to increase power and achieve efficient desalination by eliminating pH imbalances.",
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Simultaneous water desalination and electricity generation in a microbial desalination cell with electrolyte recirculation for pH control. / Qu, Youpeng; Feng, Yujie; Wang, Xin; Liu, Jia; Lv, Jiangwei; He, Weihua; Logan, Bruce Ernest.

In: Bioresource technology, Vol. 106, 01.02.2012, p. 89-94.

Research output: Contribution to journalArticle

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AU - Feng, Yujie

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AU - He, Weihua

AU - Logan, Bruce Ernest

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