Polymer membranes used in separation applications exhibit a tradeoff between permeability and selectivity. That is, that are highly permeable tend to have low selectivity vice versa. For ion-exchange such as electrodialysis reverse electrodialysis, this is expressed terms of membrane permselectivity (i.e., ability selectively permeate counter-ions over co-ions) ionic conductivity transport ions...

The utilization of bioelectrochemical systems for methane production has attracted increasing attention, but producing methane in these systems requires additional voltage to overcome large cathode overpotentials. To eliminate the need for electrical grid energy, we constructed a microbial reverse-electrodialysis methanogenesis cell (MRMC) by placing a reverse electrodialysis (RED) stack betwee...

In this study, we investigate power generation by reverse electrodialysis in a dense silica membrane that is between two NaCl solutions with various combinations of concentrations. Each silica membrane is fabricated by depositing a silica layer on a porous alumina substrate via chemical vapor deposition. The measured potential-current (V-I) characteristics of the silica membrane are used to obt...

A new type of bioelectrochemical system for producing electrical power, called a microbial reverse-electrodialysis cell (MRC), was developed to increase voltages and power densities compared to those generated individually by microbial fuel cells (MFCs) or reverse electrodialysis (RED) systems. In RED systems, electrode overpotentials create significant energy losses due to thermodynamically un...

• Two-stage reverse electrodialysis system used over 30 days with natural river and seawater. Average total gross power density of 0.35 W·m -2 maximum energy efficiency 37% Multivalent ions showed different behaviour between the first second stage. Cleaning strategies applied did not recover initial pressure drop. Stack autopsy revealed mostly organic fouling at membrane surface spacers. A mult...