Microbial electrosynthesis of hydrogen peroxide in microbial reverse-electrodialysis electrolysis cell

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Abstract

Microbial reverse-electrodialysis electrolysis cell (MREC) as a novel type of microbial electrochemical technologies has been proposed to produce H2 and CH4. In this study, we developed MREC to produce the strong oxidant H2O2. In the MREC, electrical potential generated by the exoelectrogens and the salinity-gradient between sea water and river water were utilized to drive the high-rate H2O2 production without external power supply. Operational parameters such as air flow rate, pH, cathodic potential, flow rate of high and low concentration solution were investigated. The optimal H2O2 production were observed at high and low concentration solution flow rate of 0.5 mL/min, air flow rate of 8-20 mL/min, cathode potential of -0.485 ± 0.025 V (vs Ag/AgCl). Under the optimal conditions, the maximum H2O2 yield of 778 ± 11 mg/L could be obtained. Cathode potential was found as the key factor for H2O2 production, which can be controlled through adjusting the air flow rate without power supply and potentiostat. This study shows for the first time high yield synthesis of H2O2 from oxygen reduction in a microbial electrochemical system without external power supply.
Original languageEnglish
Title of host publicationBook of abstracts : The 3rd european meeting of the international society for microbial electrochemistry and technology (EU-ISMET 2016)
EditorsFederico Aulenta, Mauro Majone
Place of PublicationRome, Italy
Publication date2016
Pages33-33
Publication statusPublished - 2016
Event3rd European Meeting of the International Society for Microbial Electrochemistry and Technology (EU-ISMET 2016) - Rome, Italy
Duration: 26 Sep 201628 Sep 2016
Conference number: 3

Conference

Conference3rd European Meeting of the International Society for Microbial Electrochemistry and Technology (EU-ISMET 2016)
Number3
CountryItaly
CityRome
Period26/09/201628/09/2016

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