ABSTRACT
The composition of the microbial community is a critical parameter for the formation of electrocatalytic biofilm (ECB), as it influences the electron transport mechanisms on the electrode surface. This chapter provides the specific characteristics of ECBs along with their mechanisms, operational parameters and the wider range of applications. ECBs generated by EABs have a potential role in driving the microbial electrochemical technologies towards societal benefit in bioremediation and bioenergy sector. The electron transfer mechanism to the intermediate electron acceptor is majorly by two mechanisms, viz., direct electron transfer and mediated electron transfer. Facilitation of improved electron donation by producing electron shuttles and permeabilizing the cell surface by integrating membrane porins results in increased electron transfer and bioelectrogenic activity. Characteristics of the aqueous medium, such as pH, nutrient levels, ionic strength, and temperature may play a role in the rate of biofilm formation on a substratum.
