During the sedimentation process, what is expected to happen to the floc?

During the sedimentation process, the floc is expected to settle to the bottom of the sedimentation basin. Floc, which consists of aggregated particles and contaminants that have been precipitated from the water, is denser than water. Because of this density, gravity acts on the floc, causing it to move downwards and accumulate at the bottom of the tank or basin.

The settling of floc is a critical step in the water treatment process because it allows for the separation of suspended solids from the treated water. This process helps ensure that the water is clearer and has fewer impurities, making it safer for consumption or further treatment. As it collects at the bottom, the floc forms a sludge layer, which can later be removed for disposal or further treatment.

The other possibilities considered, such as remaining suspended, becoming dissolved, or transforming into gas, do not occur during the sedimentation phase. Instead, sedimentation is specifically characterized by the settling of particulate matter under the influence of gravity, which is why the correct answer focuses on the floc settling to the bottom.