Competition Between Methanogens and Acetogens in Biocathodes: A Comparison Between Potentiostatic and Galvanostatic Control

Overview

Journal Int J Mol Sci

Publisher MDPI

Specialties Biochemistry
Chemistry
Molecular Biology

Date 2017 Jan 21

PMID 28106846

Citations 7

Authors

Sam D Molenaar

Pradip Saha

Annemerel R Mol

Tom H J A Sleutels

Annemiek Ter Heijne

Cees J N Buisman

Affiliations

Soon will be listed here.

Abstract

Microbial electrosynthesis is a useful form of technology for the renewable production of organic commodities from biologically catalyzed reduction of CO₂. However, for the technology to become applicable, process selectivity, stability and efficiency need strong improvement. Here we report on the effect of different electrochemical control modes (potentiostatic/galvanostatic) on both the start-up characteristics and steady-state performance of biocathodes using a non-enriched mixed-culture inoculum. Based on our results, it seems that kinetic differences exist between the two dominant functional microbial groups (i.e., homoacetogens and methanogens) and that by applying different current densities, these differences may be exploited to steer product selectivity and reactor performance.

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