The efficacy of Polyacrylamide (PAM) in water treatment is highly dependent on the correct dosage. At NINGBO INNO PHARMCHEM CO.,LTD., we emphasize that while PAM is a powerful flocculant, over or under-dosing can lead to suboptimal results. Determining the appropriate dosage is a critical step for achieving efficient water purification and cost-effectiveness.

The ideal dosage of Polyacrylamide is not a one-size-fits-all figure. It is influenced by several factors, including the nature and concentration of suspended solids in the water, the pH of the water, temperature, the presence of other chemicals, and the specific type of PAM being used (anionic, cationic, non-ionic, or amphoteric). Therefore, laboratory tests, often referred to as jar tests, are the most reliable method for determining the optimal dosage.

When using PAM as a coagulant aid, it is often added in conjunction with an inorganic coagulant. The general principle is that the inorganic coagulant destabilizes the particles, and then the PAM polymer bridges these destabilized particles into larger, more settleable flocs. The dosage of PAM in such applications is typically lower than that of the primary coagulant, often in the range of parts per million (ppm). For instance, dosages might range from 0.03 to 0.4 mg/L for certain applications, as indicated in industry guidelines.

It's important to understand the consequences of incorrect dosing. How to use polyacrylamide powder effectively means avoiding excessive amounts. Overdosing can lead to an inversion of charge or saturation of particle surfaces, causing the flocs to break apart or even disperse, thereby reducing the effectiveness of the treatment. Conversely, an insufficient dose will not provide adequate bridging and charge neutralization, resulting in poor floc formation and incomplete removal of suspended solids.

The rheological properties of the PAM solution itself also play a role. Preparing a 0.1-0.3% solution is a common recommendation. The concentration of the prepared solution can influence the effectiveness of its dispersion and interaction with the water being treated. Properly dispersing the PAM solution ensures uniform contact with the contaminants.

Factors specific to industrial processes also influence dosage. For example, in anionic polyacrylamide papermaking applications, the consistency of the pulp slurry and the type of fillers used will dictate the optimal APAM dosage for retention and drainage. Similarly, in cationic polyacrylamide sludge dewatering, the dewatering characteristics of the sludge (e.g., solids content, particle charge) will determine the required CPAM dosage.

NINGBO INNO PHARMCHEM CO.,LTD. provides high-quality Polyacrylamide products, including those with specific polyacrylamide CAS number (9003-05-8) variations. We strongly advise our clients to conduct thorough jar tests and consult with our technical experts to establish the precise dosage for their unique water treatment or industrial processes. Proper dosage management is key to unlocking the full potential of Polyacrylamide as a high-efficiency flocculant.