Microbial electrochemical sensors for volatile fatty acid measurement in high strength wastewaters: A review

Hill, Andrew and Tait, Stephan and Baillie, Craig and Virdis, Bernardino and McCabe, Bernadette (2020) Microbial electrochemical sensors for volatile fatty acid measurement in high strength wastewaters: A review. Biosensors and Bioelectronics, 165:112409. pp. 1-11. ISSN 0956-5663


Abstract

In this review, the use of MESe are evaluated in the monitoring of volatile fatty acids (VFAs) during the anaerobic digestion of high strength wastewater, with a focus on slaughterhouse wastewater. VFAs are identified as a key intermediary in anaerobic digestion, hence their accumulation could be used to infer possible process instability of anaerobic digesters. Current sample measurement for VFAs through off-line laboratory analysis can be costly, time consuming, and require specialist skills. Consequently, microbial electrochemical sensors (MESe) are currently being investigated as a low-cost alternative method for in-line VFA measurement. In this paper, the fundamental operation of MESe is summarised, including the exploration of several factors that would impact the operation of MESe in real wastewater applications. It is found that, in the context of wastewater sensing, MESe technology has been unable to bridge the gap between the laboratory and real-world anaerobic digesters effectively. Important issues surrounding biofouling, sensitivity, and detection range are explored and prioritised in this review, and an overview of potential research pathways is provided. These include the potential to further explore alternate electrode materials, use of ion exchange membranes, and development of other sensor components, as further described in the review.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Agricultural Engineering (1 Aug 2018 -)
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Agricultural Engineering (1 Aug 2018 -)
Date Deposited: 20 Aug 2020 01:18
Last Modified: 23 Apr 2021 05:44
Uncontrolled Keywords: Microbial electrochemical technologies, bioelectrochemical systems, sensors, anaerobic digestion, abattoir wastewater, volatile fatty acids
Fields of Research (2008): 09 Engineering > 0904 Chemical Engineering > 090499 Chemical Engineering not elsewhere classified
09 Engineering > 0907 Environmental Engineering > 090703 Environmental Technologies
Socio-Economic Objectives (2008): B Economic Development > 85 Energy > 8505 Renewable Energy > 850501 Biofuel (Biomass) Energy
Identification Number or DOI: https://doi.org/10.1016/j.bios.2020.112409
URI: http://eprints.usq.edu.au/id/eprint/39130

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