Improving microbial electrolysis stability using flow-through brush electrodes and monitoring anode potentials relative to theoretical minima
- Restrictions on Access:
- Restricted (PSU only).
- Graphite fiber brush electrodes are commonly used in small-scale microbial electrolysis cells to improve wastewater treatment and electrochemical hydrogen production rates relative to at electrodes. In larger microbial electrolysis cells, multiple brushes are used to provide increased anode projected surface area, with flow directed over the brushes. Here I examined the use of a single brush compressed to nearly (4.5 cm diameter) or completely (5.5 cm diameter) fi ll the thinner anode chamber (5.5 cm x 9.5 cm x 1.3 cm deep). Using the 5.5 cm brush fi bers forced flow completely through the anode and improved current production to 554 +/- 26 A/m^3, compared to current production using the smaller 4.5 cm brush (384 +/- 25 A/m^3). By monitoring anode potential performance and comparing it to operational bounds based on thermodynamic minima (delta-Ean), acclimation of the anode was more accurately assessed relative to long-term performance compared to using only current production data.
- Dissertation Note:
- M.S. Pennsylvania State University 2020.
- Technical Details:
- The full text of the dissertation is available as an Adobe Acrobat .pdf file ; Adobe Acrobat Reader required to view the file.
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