Q: Flocculators : Can you explain what a jar test is?

A: Jar testing is a pilot-scale test of the treatment chemicals used in a particular water plant. It simulates the coagulation/flocculation process and helps operators determine if they are using the right amount of treatment chemicals. The sample is stirred to observe the formation, development, and settlement of floc which forms when treatment chemicals react with material in the raw water and clump together.