What are the primary parts of a water treatment plant in a conventional treatment process?

• A. Pretreatment steps only.
• B. Coagulation, flocculation, sedimentation, filtration, disinfection, and residual management.
• C. Boiling, distillation, ozonation, and ion exchange.
• D. Storage tanks and meters only.

Answer: (D)

In a conventional water treatment plant, the water is treated through a sequence of steps that remove particles and pathogens in a practical progression. Coagulation and flocculation destabilize and clump together small particles so they become larger, more easily removed. Sedimentation then allows those formed flocs to settle to the bottom as solids removal. Filtration takes out remaining suspended materials by passing water through filters. Disinfection follows to inactivate or kill remaining microorganisms before the water leaves the plant. Many plants also manage the byproducts and maintain disinfectant residuals in the distribution system, which is referred to as residual management. Storage tanks and meters are part of the distribution and monitoring side of the system, not the core treatment processes. The other listed options involve methods outside the conventional treatment sequence, such as advanced processes or purely distribution-related components.