True or False: Sedimentation is the immediate process after coagulation in water treatment.

Sedimentation is indeed the immediate process that follows coagulation in the water treatment process. During coagulation, chemical coagulants are added to water, which causes small particles and impurities to clump together into larger aggregates known as flocs. This is crucial because these flocs can then be more easily removed from the water.

Once the coagulation process is complete, the water is allowed to sit undisturbed in a sedimentation basin. During this time, the heavier flocs settle to the bottom due to gravity, effectively separating them from the clearer water above. This sedimentation step is essential for reducing turbidity and removing contaminants before the water undergoes further treatment, such as filtration and disinfection.

Other options suggest variability or conditions under which sedimentation might not occur immediately after coagulation, but in standard water treatment practices, sedimentation is universally recognized as the direct next step in the treatment sequence.