Preliminary Evaluation of Asparagus Waste as a Substrate in Microbial Fuel Cells (MFCs) for Bioelectricity Generation

Rojas Flores S.J.; Otiniano N.M.; Cabanillas-Chirinos L.; Cruz-Noriega M.L. · International Journal of Environmental Science and Development (2026) · DOI: 10.18178/ijesd.2026.17.1.1565

Resumen

The critical need for renewable energy solutions and effective agricultural waste management presents significant global challenges. This study aimed to evaluate the potential of asparagus waste as a substrate for energy generation in microbial fuel cell. Rich in organic compounds such as carbohydrates, proteins, and bioactive substances, asparagus waste demonstrated remarkable potential as a bioelectricity substrate source. Key findings included a peak power density of 235.213±24.118 mW/cm2, a current density of 4.685 A/cm2, and an internal resistance of 56.874±4.517 Ω, observed on the thirteenth day of monitoring. Optimal parameters, including a pH of 4.777±0.146 and electrical conductivity of 139.841±4.254 mS/cm, further highlighted its efficiency. Furthermore, connecting three MFCs in series generated a combined voltage of 2.86 V, sufficient to light an LED bulb, demonstrating the technology’s scalability. This research offers groundbreaking insights into the use of asparagus waste, setting it apart from other agricultural by-products due to its unique composition and superior energy conversion efficiency. This novel approach not only facilitates waste valorization but also lays the groundwork for sustainable energy systems, especially in asparagus-producing regions such as Peru. By establishing a framework for standardizing MFC parameters, this study contributes to the advancement of scalable renewable energy systems while promoting environmental conservation and delivering economic benefits to agricultural communities. Future investigations could focus on improving system efficiency and expanding its applicability across different contexts. Copyright

Instituciones: Universidad César Vallejo