Why do the flocs float after using APAM?
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After conducting a flocculation test using the anionic polymer Pam, the flocs began to sink; however, after some time they clumped together and started to float. What is causing this phenomenon? Is it related to an excessive amount of chemical added?
The pH value is in the range of 8-9; if the pH is too high, then the situation you mentioned will occur. It could also be due to poor quality of PAC or an excessive amount being added; this is particularly severe when the water temperature is low, and there is basically no solution.
Hello, the pH was adjusted to between 8 and 9 before processing. What is the principle behind the floating of flocs? Is it because a large number of bubbles are formed within the flocs?
What type of wastewater? A high dosage of polypropylene is one reason; an excessive dosage can cause the flocs to float to the surface, and low pH is another factor.
Pesticide wastewater has a pH of around 7; why does floating occur when a large amount of polypropylene is added?