Effects of temperature on turbulent flocculation. Fluid dynamics and chemistry

Adrian T. Hanson, John L. Cleasby

Research output: Contribution to journalArticlepeer-review

74 Scopus citations


One of the primary objectives of the research described here was to identify the best available measure of the intensity of turbulence with a view to correcting the mixing intensity of the flocculation process to compensate for temperature effects. It was concluded, however, that no one measure of turbulence intensity is better than another. The authors observed that flocculation efficiency at 2 °C is not sensitive to impeller geometry, but at 5°C impeller geometry is much more important. A turbine impeller caused much more floc breakup than a stake and stator impeller. With metal coagulants, the use of constant pOH is appropriate for correcting system chemistry for temperature effects. Alum floc was significantly weaker than iron floc under all conditions tested.

Original languageEnglish (US)
Pages (from-to)56-73
Number of pages18
JournalJournal / American Water Works Association
Issue number11
StatePublished - Jan 1 1990


Dive into the research topics of 'Effects of temperature on turbulent flocculation. Fluid dynamics and chemistry'. Together they form a unique fingerprint.

Cite this