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Surface phenomena and hydrodynamic effects on the deposition of pseudomonas fluorescens
Author(s) -
Pinheiro M. M.,
Melo L. F.,
Bott T. R.,
Pinheiro J. D.,
Leitão L.
Publication year - 1988
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450660109
Subject(s) - adhesion , pseudomonas fluorescens , aluminium , deposition (geology) , biofilm , brass , copper , chemistry , bacteria , materials science , metallurgy , geology , organic chemistry , paleontology , sediment
Biofilm adhesion to metals (copper, aluminium and brass) was studied at two different velocities and pH values of 7 and 9. Both bacteria and metals showed negative surface charges at those values of pH, which tends to slow down adhesion. Film densities increased with the fluid velocity and were also affected by the pH and by the growth rate of the bacteria. Long duration tests based on heat transfer measurements were run at five different fluid velocities and at pH = 7, showing in general an asymptotic behaviour and a control of deposition by adhesion and growth phenomena.