Does polyacrylamide flocculant dosage affect dewatering effect of sludge?

Zang et al. explored the impact of polyacrylamide flocculant dosage on the flocculation and dewatering effect of sludge . The dewatering effect was enhanced with the increase of the flocculant dosage when the flocculant dosage was lower than 1.20 g/L.

What is a dewatering flocculant?

Common dewatering flocculants include inorganic salt coagulants, such as ferric and aluminium salts, inorganic polymeric flocculants – such as polymeric aluminium chloride (PAC) – and organic polymeric flocculants, mainly including polyacrylamide (PAM) and PAM derivatives.

Does compounding affect dewatering performance?

The dewatering performance by using inorganic flocculants (polyaluminum ferric chloride, PAFC), organic flocculants (anionic polyacrylamide, APAM), and their compounded flocculants was compared to explore the impact of their compounding on the dewatering performance.

Do polymer flocculants improve dewatering performance?

Wang et al. (2020) compared the performance of inorganic and ionic organic polymer flocculants in terms of treating the clay slurry, proposing that the use of PAMs can achieve more favourable dewatering performance.

Do compound flocculants improve sludge dewatering performance?

These changes in properties resulted in better dewatering performance of the sludge in filter-pressing and electro-osmotic. The economic analysis reveals that addition of the compound flocculants during the three-stage dewatering process achieved a lower cost than that with addition of single flocculants.

Which flocculants improve sludge settling performance?

4. Conclusions (1) PAC, FeCl 3, Al 2 (SO 4) 3, APAM, and CPAM were used as flocculants to improve the sludge settling performance, and the best flocculation effect was achieved when the dosages of PAC, FeCl 3, and Al 2 (SO 4) 3 were 100 mg/L, with an SV30 of 65.5%, 68%, and 84%, and an SVI of 70, 73, and 75, respectively.