Does a Higher Degree of Ionization in Cationic Polyacrylamide Enhance Its Efficacy?

In the water treatment industry, polyaluminum chloride and PAM polyacrylamide are essential water purifying agents with wide applications, especially in mud pressing. PAM polyacrylamide can absorb small suspended and insoluble particles in water through its molecular chain and form large flocs that settle down, making water clear and reducing various indicators, thus achieving standard emission. During the mud pressing process, the technical content of PAM polyacrylamide is relatively high, and the suitable model of PAM polyacrylamide should be selected to achieve the expected effect with the press filter. So, how to choose the PAM polyacrylamide model for mud pressing?

Different industries use different types of PAM polyacrylamide

PAM Polyacrylamide is divided into anionic, cationic, and nonionic types according to its model. Cationic polyacrylamide is commonly used in press filtering, and cationic polyacrylamide is selected based on different ion degrees and wastewater qualities ranging from 10 to 60. Sludge can be divided into organic sludge and inorganic sludge. Inorganic sludge is simple in nature and can use anionic polyacrylamide. For inorganic sludge, such as livestock farms, slaughterhouses, and sewage treatment plants, cationic polyacrylamide is generally used with polyaluminum chloride (or ferric chloride, polymeric ferric sulfate), etc.

The effect of PAM polyacrylamide mud pressing mainly depends on the moisture content of the mud cake, and whether the moisture content of the mud slurry is related to the ion degree

Cationic polyacrylamide is defined by ion degree and model. There are two main factors corresponding to the ion degree: the price of PAM polyacrylamide and the dosage of PAM polyacrylamide. The lower the ion degree, the lower the unit price, and the larger the mud pressing quantity. The higher the ion degree, the higher the unit price, the smaller the dosage, and the little difference in mud pressing effect. Therefore, the moisture content of the sludge is not directly related to the ion degree, but for sludge with high inorganic content, the model and ion degree need to be determined through experiments.

The coagulation effect of PAM polyacrylamide has always been a concern, and it is challenging to obtain good water treatment quality. We need to know what factors affect the coagulation effect of PAM polyacrylamide so that we can use it better. The degradation of PAM polyacrylamide solution increases with storage time, and the viscosity decreases, resulting in poor coagulation effect.

Therefore, suitability is essential, and the higher the ion degree of cationic polyacrylamide does not necessarily mean better effects. There are more problems in wastewater treatment based on the water quality, nature of wastewater, and press filter situation.