A microbial reverse-electrodialysis electrolysis cell (MREC) was used to produce hydrogen gas from fermentation wastewater without the need for additional electrical energy. Increasing the number of cell pairs in the reverse electrodialysis stack from 5 to 10 doubled the maximum current produced from 60 A/m(3) to 120 A/m(3) using acetate. However, more rapid COD removal required a decrease in t...

Reverse osmosis (RO) and electrodialysis (ED) are the two most important membrane technologies for water desalination treatment. Their transport mechanisms very different, but on a closer look also have many similarities. In this tutorial review, we describe state-of-the-art theory both processes, focusing simple examples that helpful non-specialist classroom teaching. We relevant ion coupling ...

There is a tremendous source of entropic energy available from the salinity difference between river water and seawater, but this energy has yet to be efficiently captured and stored. Here we demonstrate that H(2) can be produced in a single process by capturing the salinity driven energy along with organic matter degradation using exoelectrogenic bacteria. Only five pairs of seawater and river...