Simultaneous electricity generation and microbially-assisted electrosynthesis in ceramic MFCs

Gajda, Iwona; Greenman, John; Melhuish, Chris; Ieropoulos, Ioannis

Abstract

© 2015 Elsevier B.V. To date, the development of microbially assisted synthesis in Bioelectrochemical Systems (BESs) has focused on mechanisms that consume energy in order to drive the electrosynthesis process. This work reports - for the first time - on novel ceramic MFC systems that generate electricity whilst simultaneously driving the electrosynthesis of useful chemical products. A novel, inexpensive and low maintenance MFC demonstrated electrical power production and implementation into a practical application. Terracotta based tubular MFCs were able to produce sufficient power to operate an LED continuously over a 7day period with a concomitant 92% COD reduction. Whilst the MFCs were generating energy, an alkaline solution was produced on the cathode that was directly related to the amount of power generated. The alkaline catholyte was able to fix CO2 into carbonate/bicarbonate salts. This approach implies carbon capture and storage (CCS), effectively capturing CO2 through wet caustic 'scrubbing' on the cathode, which ultimately locks carbon dioxide.

• Journal Article Type: Article
• Publication Date: Aug 1, 2015
• Deposit Date: Mar 24, 2015
• Publicly Available Date: Mar 18, 2016
• Journal: Bioelectrochemistry
• Print ISSN: 1567-5394
• Electronic ISSN: 1878-562X
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 104
• Pages: 58-64
• DOI: https://doi.org/10.1016/j.bioelechem.2015.03.001
• Keywords: terracotta MFC, wet scrubbing, catholyte generation, water recovery, microbially assisted electrosynthesis
• Public URL: https://uwe-repository.worktribe.com/output/830398
• Publisher URL: http://www.sciencedirect.com/science/article/pii/S1567539415000250
• Additional Information: Additional Information : Article available online 18 March 2015.
• Contract Date: Mar 18, 2016