ABSTRACT
Any water treatment is done in the context of a treatment train, which is a collection of unit processes. Such unit processes may include screening, sedimentation, flotation, coagulation, filtration, adsorption, ion-exchange, gas transfer, oxidation, biological reactions, and disinfection. The aggregation selected, i.e., the treatment train, if applied to full scale with all of the needed appurtenances and engineering to make it function on a continuous basis, is a water treatment plant. The objective of water treatment, by this treatment train, is to effect a change in water quality.
