The impact of material properties, nutrient load and shear stress on biofouling in food industries

• Tipo: Artigo em Revista Científica Internacional
• Data: 2015

Autores

J. M. R. Moreira (Autor) FEUP; L. C. Gomes (Autor) FEUP; M. Simões (Autor) FEUP; L. F. Melo (Autor) FEUP; F. J. Mergulhão (Autor) FEUP

Revista

Título: Food and Bioproducts Processing: Transactions of the Institution of of Chemical Engineers, Part C

Vol. 95

Páginas: 228-236

ISSN: 0960-3085

Editora: Institution of Chemical Engineers

Indexação

ISI Web of Knowledge - 13 Citações

ISI Web of Science

Scopus - 19 Citações

INSPEC

Classificação Científica

FOS: Ciências da engenharia e tecnologias

CORDIS: Ciências Tecnológicas

Projetos Associados

UI0511 - PROJECTO ESTRATÉGICO - UI 511 - 2013-2014

LEPAE/CEFT - RL2 - (Bio) Chemical Engineering: Multi-Scale Approaches for Sustainable Environment and Health

Outras Informações

ID Authenticus: P-00G-CSR

DOI: 10.1016/j.fbp.2015.05.011

Abstract (EN): In the food industry, biofilm formation in pipes, equipment and cooling systems increases maintenance costs, decreases operational efficiencies and is a source of contamination. Shear stress, nutrient load and surface material are important variables affecting the biofilm onset in industry. In this work, the combined impacts of these variables were assessed using three different materials (glass, copper and stainless steel), two nutrient loads (high and low nutrient medium) and two hydrodynamic conditions (static and dynamic). Initial adhesion and biofilm formation were studied in microplates using Escherichia coli as a model organism. Surface material was the factor with the strongest impact and adhesion/biofilm formation were correlated with surface hydrophobicity. However, the impact of this variable was dependent on the nutrient load and imposed shear stress. It was also found that, for the majority of the situations tested, initial attachment performance is a good predictor of biofilm formation behaviour and that the effects observed during attachment are amplified during biofilm maturation. Since shear stress is a major determinant in cell adhesion, the results of this study may find application in industrial systems operating at flow rates between 0.001 and 600 m(3) h(-1) depending on tube material and diameter.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 9