Advances in biological wastewater treatment and simultaneously hydrogen generation from organic wastewater by microbial electrolysis cell

Hydrogen production by microbial electrolysis cell (MEC) is capable of converting chemical energy presented in organic wastewater into clean hydrogen energy with accomplishment of wastewater treatments simultaneously, which possibly captures considerable environmental and economic benefits. The mechanism and composition of MEC are summarized. The key materials and core technologies of MEC are reviewed and its potential application is proposed.