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