Flocculation is a water treatment process where solids form larger clusters, or flocs, to be removed from water. It is a chemical process that involves adding chemicals to the wastewater in sequence and allowing tiny solid particles to collect together in a larger mass called a floc. The process of flocculation is carried out in stages. In the first stage, a coagulant like aluminium sulphate is added to the wastewater. The positively charged coagulant molecules neutralize the negatively charged solid particles suspended in the water. Neutralizing these particles paves the way for them to flocculate together into a larger mass. After flocculation is complete, the large solid masses can be removed from the wastewater stream. This is done either through settling where the floc drops to the bottom for removal or through the use of filters which capture the floc in the filter material. Flocculants are substances that promote the agglomeration of fine particles present in a solution, creating a floc, which then floats to the surface (flotation) or settles to the bottom (sedimentation) . The flocculation process is a gentle mixing stage that increases the size of the particles from micro-floc to large, visible suspended particles called pin-floc. Flocculation is used in wastewater treatment to remove suspended solids through a process that destabilizes the suspended particles in water solutions.