Bioelectrochemical systems serve anaerobic digestion process for process monitoring and biogas upgrading

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Bioelectrochemical systems (BESs), which employ microbes as catalysts to convert chemical energy stored in organic matter into sustainable electricity and high-value chemicals, is an emerging and promising technology. BESs have broad applications including wastewater treatment, chemical production, resource recovery and waste remediation. Recently, new concepts of integrating BES with anaerobic digestion (AD) for process optimization have been proposed. The purpose of this work was to optimize the AD process using BES in two aspects: developing a new volatile fatty acid (VFA) monitoring system which can be used as the AD process indicator, and for improving biogas quality by removing CO2. Firstly, a microbial desalination cell (MDC) was developed for measuring VFAs concentrations during AD process. The response time was approx. 5 h and the detection range was 1 to 200 mM. Secondly, in order to reduce the construction cost and response time, microbial electrolysis cell (MEC) was employed as VFA biosensor. The response of the biosensor was only 1 h due to the faster transfer of VFAs supported by the external voltage. The produced H2 could potentially contribute to the energy needs for operating the biosensor and thereby to a self-sustaining system. Thirdly, to improve biogas quality, a microbial electrolytic capture, separation and regeneration cell (MESC) was developed. In MESC, acid and alkaline generation, CO2 capture, biogas upgrading and wastewater treatment were simultaneously achieved.
Original languageEnglish
Publication date2018
Number of pages1
Publication statusPublished - 2018
Event4th EU-ISMET 2018 - Tyne, United Kingdom
Duration: 12 Sep 201814 Sep 2018
Conference number: 4

Conference

Conference4th EU-ISMET 2018
Number4
CountryUnited Kingdom
CityTyne
Period12/09/201814/09/2018
OtherInternational Society for Microbial Electrochemistry and Technology, 4th European Meeting

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