Polyelectrolytes are water soluble polymer carrying ionic charge along the polymer chain. Depending upon the charge, these polymers are anionic or cationic. Polyelectrolytes are available in a wide range of molecular weights and charge densities. Homo polymers of acrylamide are also included in the family of polyelectrolytes though they do not carry any charge. These are called nonionic. Polyelectrolytes have got a wide range of applications right from water purification, oil recovery, colour removal, paper making, mineral processing, etc. Polyelectrolytes are both flocculants as well as deflocculants depending upon the molecular weight. A flocculant is essentially a solid liquid separating agent while a deflocculant is a dispersing agent.

it is  in fluid form & liquid grade polyelectrolytes and used for the same purpose with powder grade anionic polyelectrolytes. They can perform at the field both better or worse in view of wastewater character due to differences of copolymerization technics and polymer chain structure eventough both form has the same anionicity and equivalent molecular weight values. Liquid grade anionic polyelectrolytes are not only used as they supplied but also applicable as soluted in water. In comparison with powder grade anionic polyelectrolytes , liquid grade ones are more advantagous in terms of solution preparation time required.