What is a jar tester and what does it measure?

Document ID

Document ID TE1764

Version

Version 2.0

Status

Status Published

Published Date

Published Date 27/05/2017
Question
What is a jar tester and what does it measure?
Summary
The purpose of jar testers.
Answer
Jar Testing is a method of simulating a full scale water treatment process (specifically the initial coagulation process that helps remove suspendid solids from water). For each sample, several beakers (Jars) are filled with the sample water. Each jar represents a full scale water treatment tank. Chemical agents (flocculation agents) are then added in different doses and the stirrer is turned on. After the stirring process is complete, the amount and quality of floc is compared in each jar to see which results are best. Other parameters such as mixing rate, aeration level/tim, filtration type, etc. can also be altered in each jar to see how they affect sample coagulation.