How to conduct experiments on the addition amounts of PAC and PAM
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How to conduct experiments on the addition amounts of PAC and PAM
For testing the amounts of PAC and PAM to be added, it is recommended to add PAC first; depending on the flocculation results, PAM can then be added. It is best to use aeration to achieve homogenization.
First, prepare solutions of PAC with a mass concentration of 10% and PAM with a mass concentration of 0.1%, respectively； Then, take several beakers and add the same volume of water sample to each; add PACs of different concentrations first, stir rapidly for 30 seconds at a speed of over 150 rpm to ensure thorough mixing ； Add the same concentration of Pam (e.g., 1 ppm) again, and stir at low speed for a few minutes, at 30 rpm ； After the same settling time, ss or COD or other parameters are determined by visual inspection or by taking the supernatant at the same depth, and the optimal dosage of PAC is selected through comparison. Use this PAC amount for the next set of experiments to determine the optimal dosage of Pam.
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