Energy capture from thermolytic solutions in microbial reverse- electrodialysis cells

Roland D. Cusick, Younggy Kim, Bruce E. Logan

Research output: Contribution to journalArticle

Abstract

Reverse electrodialysis allows for the capture of energy from salinity gradients between salt and fresh waters, but potential applications are currently limited to coastal areas and the need for a large number of membrane pairs. Using salt solutions that could be continuously regenerated with waste heat (≥40°C) and conventional technologies would allow much wider applications of salinity-gradient power production. We used reverse electrodialysis ion-exchange membrane stacks in microbial reverse- electrodialysis cells to efficiently capture salinity-gradient energy from ammonium bicarbonate salt solutions. The maximum power density using acetate reached 5.6 watts per square meter of cathode surface area, which was five times that produced without the dialysis stack, and 3.0 ± 0.05 watts per square meter with domestic wastewater. Maximum energy recovery with acetate reached 30 ± 0.5%.

Original languageEnglish (US)
Pages (from-to)1474-1477
Number of pages4
JournalScience
Volume335
Issue number6075
DOIs
StatePublished - Mar 23 2012
Externally publishedYes

ASJC Scopus subject areas

  • General

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