When used in industrial applications, cationic polyacrylamide can sometimes have its effectiveness compromised due to improper product combinations or misunderstandings in its use. There are many factors that can lead to suboptimal performance of cationic PAM. Below, we’ll explain under what circumstances this product might be affected.

It is more appropriate to add cationic polyacrylamide (PAM) before the primary treatment structures. When the suspended solids content is relatively low, it is preferable to add PAM before the filtration unit. To ensure that the coagulated suspended solids have sufficient time to form fine flocs and to prevent a real reduction in particle concentration as well as deterioration of the surface properties of the coagulated suspended solids, the time interval between adding the coagulant and the flocculant to the water should generally be between 1 and 4 minutes.

The lower the water temperature and turbidity, and the higher the water’s colority, the longer the interval between the addition of coagulants and flocculants should be. It is also important to take into account the water’s disinfection status. If PAM is added before chlorination, the degree of water disinfection may be reduced, potentially degrading the process properties of cationic polymeric flocculants. This is because pre-chlorination might cause the cationic polyacrylamide polymer to become shielded from the disinfection process targeting biological organisms, and the polymer itself could be degraded under the action of oxidizing agents.

Cationic polyacrylamide (PAM) used in the industrial sector is a high-cost product; therefore, its effectiveness of application is extremely important. Consequently, we should select it carefully based on specific product characteristics and the nature of industry applications, and adhere strictly to established process technologies.