Enhanced Bioelectricity Generation from Microbial Fuel Cell Using Leftover Rose Petals after Attar Production as a Sustainable Substrate
摘要
This study evaluated the potential of leftover rose petals, a cellulose-based substrate from Kannauj’s attar industry, for domestic reverse osmosis (RO) reject water treatment in a double-chamber microbial fuel cell (MFC). Comparative experiments were conducted using fresh rose petals as a control substrate at varying concentrations (15 g/L, 20 g/L, and 25 g/L) to assess system performance. Electrochemical analysis, including electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), and power and current density measurements, was performed under optimal conditions using pre-isolated electroactive bacteria Pseudomonas aeruginosa. The highest power density of 305 mW/m² was achieved at a substrate concentration of 20 g/L, with a corresponding internal resistance of 55.5 Ω. These results demonstrated the viability of repurposing leftover rose petals from the attar industry as a sustainable substrate for bioelectricity generation and domestic RO reject water treatment in MFC systems.