Please use this identifier to cite or link to this item: https://hdl.handle.net/10216/103291
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dc.creatorJoana Moreira
dc.creatorLuciana Gomes
dc.creatorM. Simões
dc.creatorL. F. Melo
dc.creatorFilipe Mergulhão
dc.date.accessioned2019-09-23T23:12:58Z-
dc.date.available2019-09-23T23:12:58Z-
dc.date.issued2015
dc.identifier.othersigarra:186241
dc.identifier.urihttps://hdl.handle.net/10216/103291-
dc.description.abstractInorganic and biological fouling reduce the performance of heat exchangers leading to frequent process interruptions for equipment cleaning. In order to identify the key parameters affecting bacterial adhesion and biofilm formation, different surfaces and different nutrient loads were tested under static and dynamic conditions. Copper, stainless steel and glass surfaces were assayed under high or low nutrient loads in static conditions or under agitation (shear stress of 0.27 Pa) using Escherichia coli as a model organism. Results show that nutrient load had a higher effect on biofilm maturation than on cell adhesion. It was also found that shear stress is particularly important when copper surfaces are used. For this surface, higher biofilm amounts were obtained in static conditions especially under high nutrient load (4-fold increase when compared to dynamic conditions). This trend was observed since the initial adhesion step. Collectively, results show that for all the tested conditions, surface properties have the most significant effect on cell adhesion and biofilm formation. This effect is more pronounced under low nutrient load and, in most cases, a correlation with surface hydrophobicity was found.
dc.language.isoeng
dc.relationinfo:eu-repo/grantAgreement/Autoriadade de Gestão do Programa Operacional Regional do Norte/Programas Integrados de IC&DT/NORTE-07-0124-FEDER-000025/(Bio) Chemical Engineering: Multi-Scale Approaches for Sustainable Environment and Health/LEPAE/CEFT - RL2
dc.relationinfo:eu-repo/grantAgreement/COMISSÃO EUROPEIA/7.º Programa-Quadro de IDT/287514//SUSCLEAN
dc.relation.ispartofProceedings of International Conference on Heat Exchanger Fouling and Cleaning
dc.rightsrestrictedAccess
dc.titleThe importance of material properties, nutrient load and shear stress on biofilm formation
dc.typeArtigo em Livro de Atas de Conferência Internacional
dc.contributor.uportoFaculdade de Engenharia
Appears in Collections:FEUP - Artigo em Livro de Atas de Conferência Internacional

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