Effect of surface shear stress on the attachment of Pseudomonas fluorescens to stainless steel under defined flow conditions
The ease with which microorganisms grow on submerged surfaces is the cause of certain industrial problems (i.e. fouling and corrosion of pipelines, heat exchangers, cooling towers, etc.). Application of the radical-flow growth chamber to the study of the initial stages of bacterial adhesion to surfaces under flowing conditions is reported. The adhesive properties of the bacterium Pseudomonas fluorescens (NCIB9046) to stainless steel (type AISI 316 were found to highly dependent on surface shear stress and the time and concentration of cells used in the incubation procedure. Maximum levels of adhesion occurred in zones of lowest surface shear stress, particularly less than 6-8 Nm/sup -2/, Adhesion was still noticeable to shear stresses even up to 130 Nm/sup -2/. Significant detachment of cells from a monolayer attached under static conditions was found to occur at surface shear stresses in excess of 10-12 Nm/sup -2/. (JMT)
- Research Organization:
- A.E.R.E., Harwell, England
- OSTI ID:
- 5407916
- Journal Information:
- Biotechnol. Bioeng. Symp.; (United States), Vol. 24:1
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
PSEUDOMONAS
ADHESION
STAINLESS STEEL-316
BIOLOGICAL FOULING
BENCH-SCALE EXPERIMENTS
FERMENTATION
FLOW STRESS
RESPONSE MODIFYING FACTORS
SHEAR PROPERTIES
WASTE PROCESSING
ALLOYS
BACTERIA
BIOCONVERSION
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANT ALLOYS
FOULING
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
MANAGEMENT
MATERIALS
MECHANICAL PROPERTIES
MICROORGANISMS
MOLYBDENUM ALLOYS
NICKEL ALLOYS
PROCESSING
STAINLESS STEELS
STEELS
STRESSES
WASTE MANAGEMENT
520100* - Environment
Aquatic- Basic Studies- (-1989)
360105 - Metals & Alloys- Corrosion & Erosion