Can synthetic polymers improve coagulation & flocculation efficiency?

Organic synthetic flocculants In recent years, many synthetic polymers have been used as the main flocculants (coagulant aids) which could enhance the coagulation and flocculation efficiency with promising results have been reported (Ahmad et al., 2008, Kang et al., 2007).

What is a polymeric flocculant?

In most cases, they are derived from oil-based and non-renewable raw materials (Suopajärvi et al., 2013). Commonly used polymeric flocculants include polyacrylamide, polyacrylic acid, poly (diallyl dimethyl ammonium chloride) (DADMAC), polyamine and others (Singh et al., 2000).

What are flocculants & Coagulant aids?

Up to now, a wide range of flocculants (also known as coagulant aids) have been developed or designed to improve the flocculation process in wastewater treatment including synthetic or natural organic flocculants and grafted flocculants.

What are coagulants & flocculants?

Chemical coagulants and flocculants The conventional chemicals that are widely applied in industrial wastewater treatment can be classified into two major groups: inorganic mineral additives/metal salts which are used as coagulants and organic polymeric materials that are employed as flocculants.

Why are polymeric flocculants used in industrial effluent treatment?

Polymeric flocculants, synthetic as well as natural have become very popular in industrial effluent treatment due to their natural inertness to pH changes, high efficiency with low dosage, and easy handling (Singh et al., 2000).

Is CPAM a good flocculant for high-concentration activated sludge suspension?

The results show that the addition of CPAM achieves the best flocculation for high-concentration activated sludge suspension, and that the sludge interface descent rate, sludge volume index, and sludge settling ratio are better than those of other flocculants.