[P005] Poster

12:10 PM - 1:00 PM JST(3:10 AM - 4:00 AM UTC)

[P03-411] Microwave-Assisted Green Synthesis of Fe–Co MOF/Frass Biochar Anodes Coupled with Dual-Substrate Co-Metabolism for Enhanced Methyl Orange Degradation in Microbial Fuel Cells

○Shu-Hui Liu¹, Chun-Hua Zhang¹, Wei-Tzu Huang² (1. Department of Safety, Health and Environmental Engineering, National Yunlin University of Science and Technology (Taiwan), 2. Graduate School of Engineering Science and Technology, National Yunlin University of Science and Technology (Taiwan))

Keywords:

Microbial fuel cell,Methyl orange,Fe–Co metal-organic framework,Frass-derived biochar,Co-metabolism

Methyl orange (MO) is a toxic azo dye with high persistence, toxicity, and potential carcinogenicity, posing serious threats to human health and the environment. Therefore, the development of effective treatment technologies for MO-containing wastewater is urgently needed. Microbial fuel cells (MFCs) have attracted considerable attention as bioelectrochemical systems capable of simultaneously removing pollutants and recovering energy. In MFCs, microorganisms oxidize substrates and transfer the released electrons to the anode, where they subsequently flow through an external circuit to the cathode and participate in reduction reactions. However, the overall performance of MFCs is often limited by the catalytic activity and electron transfer efficiency of the anode electrode. In this study, a novel Fe–Co metal-organic framework composite frass-derived biochar anode (BC/Fe–Co@MOF) was fabricated via a microwave-assisted green synthesis method. In addition, a dual-substrate co-metabolism strategy using fructose and ammonium nitrate was employed to further enhance the electrochemical performance and biodegradation efficiency of the MFC system. The results showed that when BC/Fe–Co@MOF was used as the anode, 100% MO removal was achieved within 40 h, demonstrating excellent degradation performance. Under co-substrate conditions, complete MO removal was achieved within 35 h in both the fructose + MO and ammonium nitrate + MO systems. Notably, the fructose + ammonium nitrate + MO system achieved complete MO removal in less than 30 h and exhibited the best electrochemical performance among all tested conditions. These findings indicate that the high specific surface area, structural stability, and porous characteristics of the bimetallic MOF composite, together with the dual-substrate co-metabolism strategy, can effectively enhance the electrochemical activity of the MFC system and improve MO biodegradation efficiency. This study highlights the potential of combining BC/Fe–Co@MOF anodes with dual-substrate co-metabolism as a promising strategy for azo dye wastewater treatment.