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Surface Water Treatment (Jar Test)
What is a Jar Test?
Jar tests are used in water treatment to determine the optimum dose of a coagulant. The most common;y used coagulant is ALUM.
Results of the test are dependent on current raw water quality, which may vary day-to-day
The apparatus is operated to stimulate a mixing, flocculation and settling cycle.
Varying amounts of coagulants are added at the same time to the jars that contain water to be treated.
After rapid mixing, the turbidity in each jar is measured and plotted against the coagulant dose.
The optimum ALUM dose is determined by this plot.
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