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 flocculate Phaeodactylum tricornutum?

However, Nguyen et al., observed high flocculation efficiency of marine microalgae Phaeodactylum tricornutum with a cationic polyacrylamide flocculant (FO3801). The discrepancy in the literature suggested that a future flocculation study using one type of polymer with multiple marine species. 4. Conclusions

Which cationic polymer has the best flocculation efficiency?

The PAmPTAC polymer had an optimal dose at 252 mg/g dry biomass. The difference in flocculation efficiency between two polymers is likely due to the differences in molecular weight. In the flocculation process by cationic polymers, charge neutralization of microalgal cells initiates floc formation.

Does nonionic polyacrylamide increase settling rate during geotextile filtration?

The effect of different flocculants, particularly nonionic polyacrylamide (NPAM) and cationic polyacrylamide (CPAM), was assessed by the settling rate of the dredged slurry. The results showed that both NPAM and CPAM significantly increased the settling rate of the slurry during geotextile filtration at an optimum concentration of around 250 mg/L.

How do cationic polymers cause flocculation?

In the flocculation process by cationic polymers, charge neutralization of microalgal cells initiates floc formation. High molecular weight polymer (i.e. very long chain of monomers) bridges destabilised microalgae flocs , , .

What is cationic paetac & pamptac?

Cationic PAETAC & PAmPTAC were synthesized by UV-induced radical polymerization. New polymers showed good flocculation performance of freshwater & marine microalgae. Optimal doses of PAETAC were 50 and 4.8 mg/g for C. vulgaris & P. purpureum. PAETAC and PAmPTAC produced stable flocs, supporting simple dewatering step.