chemical role flocculant [Wikipedia] A synthesis role used to remove suspended solids from liquids by inducing flocculation (the solids begin to aggregate forming flakes, which either precipitate to the bottom or float to the surface of the liquid, and then they can be removed or collected). Flocculants, or flocculating agents (also known as flocking agents), are chemicals that promote flocculation by causing colloids and other suspended particles in liquids to aggregate, forming a floc. clarifying agent