Easyfloc Polyacrylamide Flocculant Test Method in Water Treatment


1. Weigh 100 mg of polymer, then slowly charge 100 ml of tepid tap water. Add the granules almost singly so that they fall into the vortex of the water which is being stirred rapidly, if none of the aforementioned solvents are available. That ratio will produce a 0.1 % polymer solution. Place the beaker on a heated magnetic stirrer for optimum results. Mix until all the granules have disappeared into a homogeneous solution without lumps or fish eyes. Reduce the speed to 50 rpm and after as much as 60 minutes of stirring, a viscous and homogeneous solution should have been formed. The water and granules may be mixed vigorously in a stoppered flask for several minutes before quiescence. Allow the solution to uncoil fully by causing the solution to stand quiescently for 60-90 minutes.


2. Charge 1000 ml of untreated sample into a beaker and place in a jar tester. Be sure that the sample you have selected is representative of the plant process, especially with respect to pH, temperature, TSS, homogeneity, biological activity etc. A standard gang stirrer works effectively. Stir samples at high speed while charging the polymer solution to be tested. Set the stirrer speed at 100-150 rpm and after 3-8 minutes, rapidly charge the desired amount of polymer solution. Then reduce the stirrer speed to 40-50 rpm for 1-2 minutes. Stop the stirrer and observe results for up to 10 minutes. One ml of polymer solution charged to 1.0 L of sample yields a 1.0 ppm polymer feed rate.


3. Initially apply dosages of 1-10 ppm. If no performance is observed, increase the dosage by 5 ppm until you have tested dosages up to 100 ppm. Thereafter, increase dosages by 100 ppm up to 1000 ppm. It is sometimes necessary to adjust pH, as in the case of MeOH precipitation. Grefloc coagulants may also be required when the flocculant dosages do not reveal desired settling.


4. Continue testing samples until you have applied Easyfloc polymer solutions in all the appropriate dosage ranges.


5. Observe which sample(s) had the fastest solids' settling rate, largest floc, densest floc mass, clearest supernatant. Congratulations! You have just selected the Grefloc polymer which should be used to clarify your waste stream. You may now schedule a trial application of the new polymer. Call us with any questions which may arise and please advise us of your final testing results