Effect of Substrate on the Efficiency of Microbial Electrolysis Cells

Microbial Electrolysis Cells (MECs) present a promising avenue for sustainable bioenergy generation by harnessing microbial activity to drive electrochemical reactions. The choice of substrate plays a crucial role in dictating the efficiency and overall performance of MECs. This chapter provides a thorough investigation into the influence of various substrates on MEC efficiency, offering insights into their impact on microbial behavior, electrochemical responses and resultant bioenergy production. The substrates utilized in MECs categorizing them based on their composition and availability. Critical factors guiding substrate selection such as chemical makeup, cost considerations and biodegradability are examined to underscore their importance in optimizing MEC performance. Detailed discussions on the effects of different substrate types and concentrations elucidate the direct influence on key electrochemical parameters including current density, voltage and efficiency metrics. Moreover, the chapter explores the intricate interplay between substrates and microbial communities, highlighting shifts in microbial composition and their implications for MEC performance. Challenges related to substrate utilization are discussed, paving the way for future research and advancements in substrate engineering for MECs. In a deep understanding of how substrates affect MEC efficiency is pivotal for optimizing MEC design and operation. This knowledge lays the foundation for advancing microbial electrolysis technology, ultimately contributing to sustainable bioenergy production and waste treatment.