Can cationic flocculants be used in sludge dewatering treatment?

Based on these reviews, the future research perspectives of synthesis and application on cationic flocculants in sludge dewatering treatment were proposed. Cationic polyacrylamide (CPAM) were used extensively in water treatment, enhanced oil recovery and sludge dewatering.

What is cationic polyacrylamide (CPAM)?

Cationic polyacrylamide (CPAM) were used extensively in water treatment, enhanced oil recovery and sludge dewatering. The review summarized the synthesis methods research progress of cationic flocculants.

Are cationic copolymers used in sludge dewatering?

Four groups of synthesis technologies of cationic copolymers were reviewed, including aqueous solution polymerization, dispersion polymerization, inverse emulsion polymerization and photo initiated polymerization. Furthermore, the paper reviewed that the application of cationic flocculants in sludge dewatering treatment.

Does the copolymer conditioned sludge improve the dewatering performance?

This result shows that after the sludge was conditioned by the copolymer, the bound water in the floc gaps was converted into free water, thereby improving the dewatering performance.

How does hacpam improve the dewatering performance of sludge flocs?

Compared with the commercially available CPAM, HACPAM can better promote the conversion of bound water in sludge flocs to free water through the association effect of hydrophobic groups, thereby further improving the dewatering performance.

Can a pressurized vertical electro-osmotic dewatering system improve sludge dewaterability?

Thus, the pressurized vertical electro-osmotic dewatering (PVEOD) system has been successfully employed to enhance sludge dewaterability ( Mahmoud et al., 2010, Mahmoud et al., 2011, Mahmoud et al., 2018; Zhang et al., 2020).