What is cationic polyacrylamide?

Cationic Polyacrylamide is white power or granule, the degree of ion is from 5% to 80%, soluble, good water solubility, can be dissolved in water at any percentage and be undissolved in organic solvents. CPAM shows characteristics of high polymer electrolyte, suitable for wastewater treatment with a negative charge and rich organic matter.

What factors affect the flocculation effect of cationic polyacrylamide (CPAM)?

Cationic polyacrylamide (CPAM) is a commonly used flocculant for water treatment. Factors that affect the flocculation effect and can be controlled manually include the type and dosage of CPAM, wastewater pH, stirring time and settling time, and their reasonable setting is critical to the flocculation effect of CPAM.

Does cationic polyacrylamide enhance algal harvest?

[Google Scholar] [CrossRef] Park, J.B.K.; Meerman, C.; Craggs, R. Continuous low dosing of cationic polyacrylamide (PAM) to enhance algal harvest from a hectare-scale wastewater treatment high rate algal pond. N. Z. J. Bot. 2019, 57, 112–124.

Can CPAM form cationic microblock structure?

The continuous arrangement of cationic units in CPAM can form cationic microblock structure. The electrostatic repulsion force from microblock structure is strong, and it results in a good extension of molecular chains (Chen et al. 2020).

Is sewage suitable for flocculation treatment with CPAM?

Most sewage containing suspended solids exhibits a colloidal property and negative charge and is very suitable for flocculation treatment with CPAM. UV-initiated polymerization is a new method for preparing organic flocculants, and there have been many studies in this field .

How does CPAM affect wastewater turbidity?

Figure 7 shows that with increasing CPAM dosage and stirring time, the wastewater turbidity first decreased and then increased under the condition of fixed wastewater pH, and when the CPAM dosage and stirring time were in the range of 5.5 to 6 mg·L −1 and 5 to 7 min, respectively, the wastewater turbidity had a minimum value.