Electrochemistry helps us convert chemical energy into electrical energy, and vice versa. Microorganisms can catalyze complex chemical processes. The combination of microorganisms and electrochemistry allow us to use complex chemical reactions in electrochemical systems. For example, we can extract electrical energy from the degradation of complex organic compounds present in wastewater or we can store electrical energy in chemical bonds by reducing carbon dioxide into organic chemicals.
Read more about possible applications of microbial electrochemistry in the water sector here.
You can also find more studies about microbial electrochemistry among the papers on my Google Scholar profile.