Preparation of CF-NiO-PANI Electrodes and Study on the Efficiency of MFC in Recovering Potato Starch Wastewater
Yiwei Han, Jingyuan Wang, Liming Jiang, Jiuming Lei +5
AI summary
70% confidenceA novel CF-NiO-PANI composite anode was prepared to improve the efficiency of MFC in recovering potato starch wastewater, achieving a 300% increase in power density.
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Abstract
Microbial Fuel Cell (MFC) is a novel bioelectrochemical system that catalyzes the oxidation of chemical energy in organic waste and converts it directly into electrical energy through the attachment and growth of electroactive microorganisms on the electrode surface. This technology realizes the synergistic effect of waste treatment and renewable energy production. A CF-NiO-PANI capacitor composite anode was prepared by loading polyaniline on a CF-NiO electrode to improve the capacitance of a CF electrode. The electrochemical characteristics of the composite anode were evaluated using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS), and the electrode materials were analyzed comprehensively by scanning electron microscopy (SEM), energy diffusion spectrometer (EDS), and Fourier transform infrared spectroscopy (FTIR). MFC system based on CF-NiO-PANI composite anode showed excellent energy conversion efficiency in potato starch wastewater treatment, and its maximum power density increased to 0.4 W/m³, which was 300% higher than that of the traditional CF anode. In the standard charge–discharge test (C1000/D1000), the charge storage capacity of the composite anode reached 2607.06 C/m², which was higher than that of the CF anode (348.77 C/m²). Microbial community analysis revealed that the CF-NiO-PANI anode surface formed a highly efficient electroactive biofilm dominated by electrogenic bacteria (accounting for 47.01%), confirming its excellent electron transfer ability. The development of this innovative capacitance-catalytic dual-function anode material provides a new technical path for the synergistic optimization of wastewater treatment and energy recovery in MFC systems.
Key findings
- The composite anode showed excellent energy conversion efficiency in potato starch wastewater treatment.
- The maximum power density of the MFC system based on the composite anode increased to 0.4 W/m³.
- The charge storage capacity of the composite anode was improved in the standard charge–discharge test.
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- 2025