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Electricity generation from synthetic substrates and cheese whey using a two chamber microbial fuel cell

Paper ID Volume ID Publish Year Pages File Format Full-Text
3960 201 2010 6 PDF Available
Title
Electricity generation from synthetic substrates and cheese whey using a two chamber microbial fuel cell
Abstract

In this study, the possibility of electricity generation from diluted cheese whey in a two-chamber mediator-less microbial fuel cell (MFC) was investigated. Synthetic substrates such as glucose and lactose were also used for characterization of the MFC and for microbial acclimation at the anode compartment. The maximum power density obtained using diluted cheese whey was 18.4 mW/m2 (normalized to the geometric area of the anodic electrode, which was 13.8 cm2), corresponding to a current density of 80 mA/m2 and a MFC voltage of 0.23 V. The coulombic efficiency ɛcb was very low (only 1.9%), implying that a pretreatment step of raw cheese whey is essential prior to use. For comparison, in the case of sugars (glucose and lactose) the obtained maximum power density was 15.2 mW/m2 with ɛcb equal to 28% for glucose and 17.2 mW/m2 with ɛcb equal to 22% for lactose. Impedance spectroscopy measurements showed that the dominant contribution to the cell overpotential was due to the ohmic resistance of the MFC. The contribution of the electrode overpotentials was also significant, mainly that of the cathode overpotential.

Keywords
Microbial fuel cell; MFC; Glucose; Lactose; Cheese whey; Impedance spectroscopy
First Page Preview
Electricity generation from synthetic substrates and cheese whey using a two chamber microbial fuel cell
Publisher
Database: Elsevier - ScienceDirect
Journal: Biochemical Engineering Journal - Volume 50, Issues 1–2, 15 June 2010, Pages 10–15
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering