what is a good polymer filter aid for direct filtration upflow clarifier
asked 13 December 2016 asked by parkville1 (390 points)
i believe that there are many anionic polymers in the market that you can try doing a jar test in conjunction with the coagulant that you are currently using and observe the nature of flocs that you may get, time for them to settle and check for turbidity, alkalinity from all the jars after the jar test in that way you can determine the best anionic polymer and its optimum dosage. Given your water quality conditions it is very difficult to pin point a specific anionic polymer unless you do a jar testing. i also see you have a very low turbidity and it appears that you may have difficulty in getting a good floc even you add an anionic polymer. My opinion is that there is a process called 'Actiflow' and i think that might be better process given the fact that you have very low turbidity in your raw water.
There is many kind of polymer and the only way to know the best one for your water and treatment type is to try by doing jar test. Many polymer suppliers can come to your station with polymer samples and help you do your testing if you ask them.