What is cationic polyacrylamide (CPAM)?

Cationic polyacrylamide (CPAM) is a water-soluble linear polyelectrolyte with high molecular weight and positive charge density. Because of its low cost, high efficiency, and simple operation, CPAM is widely used as a chemical conditioner for flocculation pretreatment of sludge before mechanical dewatering (Sun et al. 2018; Zhou et al. 2014 ).

How to improve flocculation efficiency of cationic polyacrylamide (CPAM)?

Among them, flocculation is an efficient and simple physicochemical method, and to be choose proper flocculant is the key factor to enhance flocculation efficiency (Li et al. 2017; Luo et al. 2013 ). Cationic polyacrylamide (CPAM) is a water-soluble linear polyelectrolyte with high molecular weight and positive charge density.

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.

Is polyacrylamide a flocculant?

As a widely used organic flocculant, polyacrylamide (PAM), a complex polymer with different charge (anion, cation or neutral), plays an important role in capturing and agglomerating colloidal sludge particles through bridging and electrostatic reactions (Ho et al., 2010; Luo et al., 2011; Wang et al., 2017 ).

What are CPAM flocculation methods?

CPAM contains long molecular chains and many cationic units, so its main flocculation methods are adsorption bridging and charge neutralization .

Does tpamd improve sludge dewatering and flocculation effect?

Compared with CPAMD and the commercial flocculants, the sludge dewatering effect (FCMC and SRF) of TPAMD has been evidently improved by 1.4% for FCMC and 1.01 × 10 12 m/kg for SRF at least based on the sludge dewatering and flocculation test. TPAMD had good flocculation effect on water plant sludge.