The drinking water treatment train — coagulation and flocculation, sedimentation, filtration, and disinfection — treatment plant design criteria, and the water quality standards that drive treatment requirements.
A conventional drinking water plant is built on a multi-barrier philosophy: no single treatment step is trusted to remove every contaminant, so coagulation and flocculation, sedimentation, filtration, and disinfection each catch what the previous stage was not designed to address. This module walks the full treatment train stage by stage, covers the design parameters — surface overflow rate, hydraulic loading rate, CT — that size each unit process, and ties every process decision back to the specific Safe Drinking Water Act requirement it exists to satisfy.
By the end of this module you should be able to explain why a plant's real-world reliability is set by its least-adequately-designed unit process, not its best one — a systems-level way of thinking about treatment that Module 5's wastewater treatment content mirrors from the other side of the water cycle.