Polyacrylamide flocculant is a water-soluble high molecular polymer, easily soluble in water but insoluble in most organic solvents. According to ionic characteristics, polyacrylamide can be divided into four series: anionic, cationic, nonionic and amphoteric. It is widely used in sewage treatment, paper industry, mining, oil field, etc., and is known as "Auxiliary for All Industries". The main parameters of polyacrylamide PAM are molecular weight, ion degree, PH value and so on. So does the PH value affect the flocculation effect of polyacrylamide?
A large number of experiments have proved that PAM works better when the sewage pH is 6-8. Through the comparison experiment of two groups of sewage, one is alkaline sewage and the other is acid sewage. When the PH value is less than 6, the amount of polyacrylamide used to treat sewage to achieve the same effect will increase significantly. When the PH value is lower and the acidity is stronger, the amount used will increase until there is no flocculation effect. When the PH value is greater than 8, the more alkaline flocculation effect will be worse, until there is no flocculation effect.
Through a large number of experiments, it can be concluded that anionic polyacrylamide is suitable for weakly alkaline sewage, and cationic polyacrylamide is suitable for weakly acidic sewage. Whether the sewage is strongly acidic or strongly alkaline, it will affect the flocculation effect of polyacrylamide. The ideal flocculation effect is that the sewage is neutral, so that polyacrylamide can exert more performance, improve application efficiency and reduce application costs. Therefore, when using PAM, you can first adjust the pH of the sewage by adding acid or alkali.