Biofilm formation under high shear stress increases resilience to chemical and mechanical challenges

• Type: Article in International Scientific Journal
• Date: 2022

Authors

L. C. Simões (Author) Other; Inês Gomes (Author) FEUP; H. Sousa (Author) Other; Anabela Borges (Author) FEUP; Manuel Simões (Author) FEUP

Journal

Title: Biofouling

Vol. 38 No. 1

Pages: 1-12

ISSN: 0892-7014

Publisher: Taylor & Francis

Indexing

ISI Web of Knowledge - 0 Citations

ISI Web of Science

Scopus - 0 Citations

Associated Projects

LEPABE - Financiamento Plurianual 2020-2023 da Unidade de I&D LEPABE - Laboratório de Engenharia de Processos, Ambiente, Biotecnologia e Energia

Biocide_for_Biofilm - Desenvolvimento de novas soluções biocidas para o controlo efetivo de biofilmes

PRESAGE - Potencial do tratamento de águas residuais para prevenir a dispersão da resistência antimicrobiana, micropoluentes orgânicos, patogéneos e vírus

Other information

Authenticus ID: P-00V-SDF

DOI: 10.1080/08927014.2021.2006189

Abstract (EN): The effect that the hydrodynamic conditions under which biofilms are formed has on their persistence is still unknown. This study assessed the behaviour of Pseudomonas fluorescens biofilms, formed on stainless steel under different shear stress (tau w) conditions (1, 2 and 4 Pa), to chemical (benzalkonium chloride - BAC, glutaraldehyde - GLUT and sodium hypochlorite - SHC) and mechanical (20 Pa) treatments (alone and combined). The biofilms formed under different tau w showed different structural characteristics. Those formed under a higher tau w were invariably more tolerant to chemical and mechanical stresses. SHC was the biocide which caused the highest biofilm killing and removal, followed by BAC. The sequential exposure to biocides and mechanical stress was found to be insufficient for effective biofilm control. A basal layer containing biofilm cells mostly in a viable state remained on the surface of the cylinders, particularly for the 2 and 4 Pa-generated biofilms.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 12