Issue 5, 2021

Enhancing the performance of a microbial electrochemical system with carbon-based dynamic membrane as both anode electrode and filtration media

Abstract

Microbial electrochemical systems (MESs) can be incorporated with membrane filtration that assists the bioelectrochemical treatment. Herein, a dynamic membrane (DM) was created on the carbon cloth-based anode electrode in a dynamic membrane microbial electrochemical system (DMES) and evaluated for treating domestic wastewater. The advantage of this DMES was demonstrated via comparing to the one without DM filtration. It was found that DMES achieved a current density of 15.75 ± 0.86 A m−3 at 10 Ω, which is significantly higher than that of the control system with no DM filtration (6.60 ± 0.22 A m−3). Moreover, the DMES effluent had a turbidity of 11.1 ± 0.3–16.7 ± 0.5 NTU under the varied water fluxes, which is much lower than that from the control system (29.3 ± 0.8–34.8 ± 0.5 NTU). The use of a stainless-steel current collector as a part of DM could increase the current generation. However, adding one more layer of DM showed a limited improvement of the DMES performance at the expense of an additional capital cost. When fed with actual domestic wastewater for an extended operation for 30 days, DMES showed relatively stable treatment performance and was able to maintain turbidity lower than 5 NTU. This study has provided the initial results of employing the DM concept in the anode of an MES for enhanced treatment performance and electricity generation. Several challenges to be addressed were identified and discussed with further investigation.

Graphical abstract: Enhancing the performance of a microbial electrochemical system with carbon-based dynamic membrane as both anode electrode and filtration media

Supplementary files

Article information

Article type
Paper
Submitted
22 11月 2020
Accepted
09 2月 2021
First published
10 2月 2021

Environ. Sci.: Water Res. Technol., 2021,7, 870-878

Enhancing the performance of a microbial electrochemical system with carbon-based dynamic membrane as both anode electrode and filtration media

F. Liu, H. Moustafa, M. S. E. Hassouna and Z. He, Environ. Sci.: Water Res. Technol., 2021, 7, 870 DOI: 10.1039/D0EW01027H

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements