Prevention and Removal of Membrane and Separator Biofouling in Bioelectrochemical Systems: a Comprehensive Review

Overview

Journal iScience

Publisher Cell Press

Date 2022 Jun 20

PMID 35720268

Authors

Grzegorz Pasternak

Aleksander de Rosset

Natalia Tyszkiewicz

Bartosz Widera

John Greenman

Ioannis Ieropoulos

Affiliations

Soon will be listed here.

Abstract

Bioelectrochemical systems (BESs) have made significant progress in recent years in all aspects of their technology. BESs usually work with a membrane or a separator, which is one of their most critical components affecting performance. Quite often, biofilm from either the anolyte or catholyte forms on the membrane, which can negatively affect its performance. In critical cases, the long-term power performance observed for microbial fuel cells (MFCs) has dropped by over 90%. Surface modification and composite material approaches as well as chemical and physical cleaning techniques involving surfactants, acids, hydroxides, and ultrasounds have been successfully implemented to combat biofilm formation. Surface modifications produced up to 6-7 times higher power performance in the long-term, whereas regeneration strategies resulted in up to 100% recovery of original performance. Further studies include tools such as fluid dynamics-based design and plasma cleaning. The biofouling area is still underexplored in the field of bioelectrochemistry and requires systematic improvement. Therefore, this review summarizes the most recent knowledge with the aim of helping the research and engineering community select the best strategy and discuss further perspectives for combating the undesirable biofilm.

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