The impact of sampling time on concentration of collected bacterium, fungus particles and mid-value diameter of particle number are studied by ANDERSEN bioparticle sampler in lab.

A recirculating water system of 1000 feet (300 meters) with a consistent tube diameter would require as much as 25 hours of filtered recirculation time for total particle removal.

The effects of fluidization number, injection velocity, particle mean diameter and static bed height on jet fluctuation are discussed.