The MFC design supports bioelectricity generation in part because of the electrochemical gradient that exists between the anode and cathode. Mechanism for producing electrons and protons by microbial oxidation of organic compounds. It is carried out in simple, soft environmental conditions and operates using waste organic material as a substrate. Bioelectrochemical systems are more laborious since the BES process uses both biological and electrical means. Various models were employed during the optimization of the reactor design. A study on various model design reactors reveals that the components across different reactors are nearly identical. This chapter aims to supply ideas for the plan and assignments of BS to study various components that affect the design process.