The 'jar test' in water treatment is performed to determine:
Choose the correct answer
BOD of water
Optimum coagulant dose, type, and pH for effective coagulation of the specific water
Sewer inflow rates
Calibration of flow meters
Correct Answer
B. Optimum coagulant dose, type, and pH for effective coagulation of the specific water
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Jar test (IS 3025/AWWA): optimum coagulant dose, type, and pH for treating a specific water sample. Multiple jars with same raw water; different doses of coagulant added; rapid mix followed by slow stir; settle; test supernatant turbidity and residual. Result: dose-response curve showing optimal dose at minimum turbidity. Guides treatment plant operation and dose adjustment seasonally.
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