A fluid dynamic gauging device for measuring biofilm thickness on cylindrical surfaces

摘要

Many industrial processes are susceptible to biofouling. The thickness and structure of such biofilms are key factors in the design of effective cleaning strategies. A novel method based on fluid dynamic gauging has been developed for measuring the thickness and the shear stress needed for removal of the biofilms formed on cylindrical surfaces. The device operates with the test cylinder immersed in liquid: liquid is withdrawn or ejected from a nozzle located near the biofilm surface. There is no net change of liquid volume, making it ideal for sterile and aseptic operation and for studies using valuable liquids. Biofilm removal may also be tested by using appropriate hydrodynamic conditions.