Enhancing methane oxidation in a bioelectrochemical membrane reactor using a soluble electron mediator.

ABSTRACT:

Background

Bioelectrochemical methane oxidation catalysed by anaerobic methanotrophic archaea (ANME) is constrained by limited methane bioavailability as well as by slow kinetics of extracellular electron transfer (EET) of ANME. In this study, we tested a combination of two strategies to improve the performance of methane-driven bioelectrochemical systems that includes (1) the use of hollow fibre membranes (HFMs) for efficient methane delivery to the ANME organisms and (2) the amendment of ferricyanide, an effective soluble redox mediator, to the liquid medium to enable electrochemical bridging between the ANME organisms and the anode, as well as to promote EET kinetics of ANME.

Results

The combined use of HFMs and the soluble mediator increased the performance of ANME-based

SUBMITTER: Zhang X 

PROVIDER: S-EPMC7568384 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature