CDM Smith Engineering Student Interview Questions and Answers

Main unit processes in water treatment include coagulation, flocculation, sedimentation, filtration, and disinfection.

• Coagulation: Chemicals are added to water to destabilize particles and allow them to clump together.

• Flocculation: Gentle mixing to encourage the particles to form larger flocs.

• Sedimentation: Flocs settle to the bottom of a tank due to gravity.

• Filtration: Water passes through filters to remove remaining ...read more

Some advanced water treatment processes include reverse osmosis, UV disinfection, and advanced oxidation.

• Reverse osmosis: uses a semi-permeable membrane to remove ions, molecules, and larger particles from water.

• UV disinfection: uses ultraviolet light to kill bacteria, viruses, and other microorganisms in water.

• Advanced oxidation: uses powerful oxidants like ozone or hydrogen peroxide to break down organic and inorgani