Coagulation Jar Test Basic Procedure

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The purpose of the jar test, or the laboratory coagulation test, is to determine the optimum chemical conditions in terms of coagulant dose and pH for treatment of the water concerned. Here is The basic procedure for carrying out coagulation tests

Step 1:A bulk raw water sample is obtained and mixed well;

Step 2:1 liter samples are measured into the reaction vessels;

Step 3:Primary coagulant solution is added to all vessels simultaneously;

Step 4:Rapid stirring (200 rev/min) is applied for 1 minute;

Step 5:Coagulant aid solution is added rapid stirring is continued for 1 minute

Step 6:Slow stirring (20 rev/min) is applied for 15 minutes, estimating flocculation time

Step 7:Settling is allowed for 30 minutes;

Step 8:Supernatant samples are decanted and color, turbidity, and pH determined

The best result will be the dose that has produced the most rapidly-settling floc in the shortest time.



Created on:2022-12-02 09:10