Impact of bakery waste as an organic substrate on microbial fuel cell performance

A microbial fuel cell (MFC) is a type of bioelectrochemical fuel cell system. The current research focuses on the use of bakery waste as an organic substrate that can be a good source of electron donors. However, MFC is experiencing organic substrate instability. In this study, the bakery waste offered 71 days of stability in the continuous operation of MFC with the presence of a toxic metal inoculation source. Within 60 days, the energy 1.001 mW/m(2) (power density) and 103.94 mA/m(2) (current density). Electrochemical experiments also revealed that electron generation and transportation were quite high on day 60. The specific capacitance values (14 x 10(4)F/g) demonstrated that biofilm growth was relatively constant throughout the operation until day 60. On the other hand, the removal efficiency of Cd2+, Pb2+, and Cr3+ was 89.90 %, 96.00 %, and 92.20 %, respectively. Bakery waste gave significantly good removal efficiency when compared to prior literate. Finally, a brief mechanism of bakery waste oxidation by bacterial species, as well as future possibilities, are discussed.

Automated summary

Bakery waste as an organic substrate in microbial fuel cells shows good stability and high removal efficiency, indicating its potential as an alternative energy source. The study provides insights into the mechanism of bakery waste oxidation and discusses future possibilities in this field.