6533b7d7fe1ef96bd1269076

RESEARCH PRODUCT

Effect of E. coli biofilm formation and removal on passive films on AISI 316L during fermentation processes

Sannakaisa VirtanenD. PupilloF. Di FrancoMonica SantamariaGiulio GhersiG. TranchidaP. Cinà

subject

SiderophorebiologyChemistry020209 energyGeneral Chemical EngineeringBiofilmchemistry.chemical_elementIndustrial fermentation02 engineering and technologyGeneral Chemistry021001 nanoscience & nanotechnologybiology.organism_classificationAISI 316L Biofilm Disinfection Fermentation Passive film SanitizationCorrosionChromiumExtracellular polymeric substanceSettore ING-IND/23 - Chimica Fisica ApplicataChemical engineering0202 electrical engineering electronic engineering information engineeringGeneral Materials ScienceFermentation0210 nano-technologyBacteria

description

Abstract 316L coupons were sanitized in hot water vapour inducing iron enrichment in passive films. Coupons were then immersed in a pilot fed-batch fermenter in presence of E. coli. Sanitization causes iron enrichment in passive films. Fermentation causes the growth of biofilm on the SS, constituted by bacteria embedded in an extracellular polymeric substance. During fermentation SS open circuit potential is very negative due to low oxygen concentration on its surface, while the chelating action of siderophores induces chromium enrichment in the passive film. Disinfection in NaClO for 30 min allows removal of biofilm and formation of a protective passive film.

yearjournalcountryeditionlanguage
2021-06-01
10.1016/j.corsci.2021.109430http://hdl.handle.net/10447/509666