UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS

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2022-07-01 17:05

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Conference: Bucharest University Faculty of Physics 2019 Meeting


Section: Physics and Technology of Renewable and Alternative Energy Sources


Title:
Evaluation of the biological activity of microorganisms in an electrochemical setup


Authors:
Matei-Tom IACOB(1,2,3), Adrian GHINEA(3), Cristina MOISESCU(3), Doina CIRSTEA(3), Adriana BALAN(1,2), Cornelia DIAC(1,2)), Ioan ARDELEAN(3), Șerban N. STAMATIN(1,2)


*
Affiliation:
1) University of Bucharest, Faculty of Physics, 3Nano-SAE, Reasearch Centre, Magurele,PO Box MG 38, 077125, Romania

2) University of Bucharest, Faculty of Physics, Magurele,PO Box MG 38, 077125 Romania

3) Institut of Biology, Romanian Academy, Bucharest,POBox 56-53, Romania


E-mail
tom.iacob@3nanosae.org


Keywords:
bioelectrochemical systems, exoelectrogenic bacteria, redox potential


Abstract:
Bioelectrochemical systems (BES) make use of the microorganism’s ability to generate electrons that can be subsequently used in different electrochemical reactions. There are two types of BES: (1) microbial fuel cells in which power is generated and (2) microbial electrosynthesis cells in which chemicals can be produced. The bioelectrochemical activity of microorganisms plays a key role in choosing the application. Bioelectrochemical activity can be determined by measuring the change in redox potential of biological medium. An accurate and reproductive measure of the redox potential is essential in characterizing BES. This work compares the redox potential of Shewanella oneidensis MR-1 measured in a one and two-compartment electrochemical setup. This work shows that a higher redox potential value is measured by one-compartment electrochemical cells. A two-compartment electrochemical setup can offer a clearer view on the culture state of growth while delivering less accurate redox potential values.


Acknowledgement:
This work was supported by a grant of the Romanian Ministery of Research and Innovation, CCCDI-UEFISCDI, project number PN-III-P1.2-PCCDI-76/2018, "Tehnologii eco-inovative de recuperare a grupului de metale platinice din convertorii catalitici auto uzati".