Energy Capture from Thermolytic Solutions in Microbial Reverse-Electrodialysis Cells
KAUST Grant NumberKUS-I1-003-13
Online Publication Date2012-03-01
Print Publication Date2012-03-23
Permanent link to this recordhttp://hdl.handle.net/10754/598165
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AbstractReverse 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%.
CitationCusick RD, Kim Y, Logan BE (2012) Energy Capture from Thermolytic Solutions in Microbial Reverse-Electrodialysis Cells. Science 335: 1474–1477. Available: http://dx.doi.org/10.1126/science.1219330.
SponsorsThis research was supported by award KUS-I1-003-13 from the King Abdullah University of Science and Technology (KAUST). The data are presented in the figures and supporting online material.