Next-Gen bioelectrochemical wetlands for onsite treatment: Compact MFC-embedded baffled wetland supercharged by rGO-emulated metcoke and waste coagulant.
AI summary
75% confidenceA novel bioelectrochemical wetland system, combining constructed wetland and microbial fuel cell technologies, was developed to treat wastewater and generate bioelectricity. The system, which incorporates metallurgical coke and coagulation sludge as bed materials, achieved high pollutant removal rates and robust bioelectricity production. The system's adaptability and efficacy were demonstrated through trials with various wastewater matrices.
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Abstract
This research investigated a novel 60 L baffled-hybrid constructed wetland-microbial fuel cell (CW-MFC) integrating metallurgical coke (Metcoke) and coagulation sludge as bed materials to optimize pollutant removal and bioelectricity recovery. Among four bed material arrangements, the hybrid matrix of Metcoke and coagulant sludge achieved superior chemical oxygen demand (COD) reduction of 94.35 ± 5.16 %, total phosphorus removal of 92.43 ± 2.51 %, and total nitrogen removal of 82.20 ± 5.40 %. The system demonstrated robust bioelectricity production with a maximum power density of 24.97 mW/m 3 , facilitated by improved microbial adhesion and electron transfer processes. Furthermore, adaptability trials with sulfamethoxazole-contaminated hospital wastewater and methylene blue dye effluent exhibited removal efficiencies of 79.65 ± 5.09 % and near-complete degradation, respectively, confirming the reactor's efficacy across complex wastewater matrices. This integrated CW-MFC configuration provides an economical and sustainable approach for decentralised wastewater treatment coupled with concurrent energy recovery, particularly suited for resource-limited settings.