Spisni, G.; Massaglia, G.; Bertana, V.; Vasile, N.; Pirri, F.C.; Bianco, S.; Quaglio, M. Novel Microfluidic Septum to Optimize Energy Recovery in Single-Chamber Microbial Fuel Cells. Appl. Sci.2023, 13, 11423.
Spisni, G.; Massaglia, G.; Bertana, V.; Vasile, N.; Pirri, F.C.; Bianco, S.; Quaglio, M. Novel Microfluidic Septum to Optimize Energy Recovery in Single-Chamber Microbial Fuel Cells. Appl. Sci. 2023, 13, 11423.
Spisni, G.; Massaglia, G.; Bertana, V.; Vasile, N.; Pirri, F.C.; Bianco, S.; Quaglio, M. Novel Microfluidic Septum to Optimize Energy Recovery in Single-Chamber Microbial Fuel Cells. Appl. Sci.2023, 13, 11423.
Spisni, G.; Massaglia, G.; Bertana, V.; Vasile, N.; Pirri, F.C.; Bianco, S.; Quaglio, M. Novel Microfluidic Septum to Optimize Energy Recovery in Single-Chamber Microbial Fuel Cells. Appl. Sci. 2023, 13, 11423.
Abstract
This study proposes a redesign of asymmetric single-chamber microbial fuel cells (a-SCMFC) with the goal of optimizing energy production. The new approach is based on the introduction of an Intermediate Microfluidic Septum (IMS) as a relatively simple and inexpensive method to opti-mize both electrolyte flow and species transfer inside the devices. SCMFCs with the novel IMS, operated with sodium acetate as the carbon source, demonstrate to enhance the energy recovery (Erec) factor, defined as the ratio between the energy yield and the inner volume of electrolyte. In standard operative conditions, cells with IMS exhibit Erec value of (37±1) J/m3, with respect to (3.0±0.3) J/m3 of control cells. Furthermore, changing sodium acetate concentration the Erec values change accordingly. By monitoring the activity of a-SCMFCs for over one-year, beneficial impact of the IMS on both the initial inoculation phase and the long-term stability of electrical perfor-mance were observed. These improvements suggest the effectiveness of IMS to allow the de-velopment of efficient biofilms, likely due to the reduction in oxygen diffusion towards the anode. Electrochemical characterizations confirm that the presence of the IMS impacts the diffusion processes inside the electrolytic chamber, supporting the hypothesis of a beneficial effect on oxygen diffusion.
Keywords
Microbial fuel cell; Microfluidics; Fluidic separator; Single Chamber Microbial Fuel Cell; Energy Recovery optimization
Subject
Physical Sciences, Applied Physics
Copyright:
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