Microbial desalination cells for energy production and desalination
KAUST Grant NumberKUS-I1-003-13
MetadataShow full item record
AbstractMicrobial desalination cells (MDCs) are a new, energy-sustainable method for using organic matter in wastewater as the energy source for desalination. The electric potential gradient created by exoelectrogenic bacteria desalinates water by driving ion transport through a series of ion-exchange membranes (IEMs). The specific MDC architecture and current conditions substantially affect the amount of wastewater needed to desalinate water. Other baseline conditions have varied among studies making comparisons of the effectiveness of different designs problematic. The extent of desalination is affected by water transport through IEMs by both osmosis and electroosmosis. Various methods have been used, such as electrolyte recirculation, to avoid low pH that can inhibit exoelectrogenic activity. The highest current density in an MDC to date is 8.4A/m2, which is lower than that produced in other bioelectrochemical systems. This implies that there is a room for substantial improvement in desalination rates and overall performance. We review here the state of the art in MDC design and performance, safety issues related to the use of MDCs with wastewater, and areas that need to be examined to achieve practical application of this new technology. © 2012 Elsevier B.V.
CitationKim Y, Logan BE (2013) Microbial desalination cells for energy production and desalination. Desalination 308: 122–130. Available: http://dx.doi.org/10.1016/j.desal.2012.07.022.
SponsorsThis research was supported by funding through the King Abdullah University of Science and Technology (KAUST) (Award KUS-I1-003-13).