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Bio-electrochemical production of hydrogen and electricity from organic waste

Bio-electrochemical production of hydrogen and electricity from organic waste

Authors :
Alessandra Polettini
Aldo Muntoni
Alessandro Dell’Era
Mauro Pasquali
Raffaella Pomi
Tatiana Zonfa
Giorgia De Gioannis
Andreina Rossi
Publication Year :
2021
Publisher :
Research Square Platform LLC, 2021.

Abstract

This study investigated the performance of a novel integrated bio-electrochemical system for synergistic hydrogen production from a process combining a dark fermentation reactor and a galvanic cell. The operating principle of the system is based on the electrochemical conversion of protons released upon dissociation of the acid metabolites of the biological process and is mediated by the electron flow from the galvanic cell, coupling biochemical and electrochemical hydrogen production. Accordingly, the galvanic compartment also generates electricity. Four different experimental setups were designed to provide a preliminary assessment of the integrated bio-electrochemical process and identify the optimal configuration for further tests. Subsequently, dark fermentation of cheese whey was implemented both in a stand-alone biochemical reactor and in the integrated bio-electrochemical process. The integrated system achieved a hydrogen yield in the range 75.5 – 78.8 N LH2/kg TOC, showing a 3 times improvement over the biochemical process.

Details

Database :
OpenAIRE
Accession number :
edsair.doi...........0aa18ae77c100f3597d8c6c51864f194
Full Text :
https://doi.org/10.21203/rs.3.rs-1032725/v1