Which step is designed to kill pathogens that pass-through filtration?

Prepare for the Bioenvironmental Engineering Block 9 Exam with our interactive quiz. Utilize multiple choice questions, hints, and explanations to master the material and excel in your test!

Multiple Choice

Which step is designed to kill pathogens that pass-through filtration?

Explanation:
The essential idea is that after filtration, a disinfection step is added to inactivate any pathogens that slip through the filtration barrier. Filtration lowers turbidity and removes many particles, and pathogens may still be present at low levels or attached to what’s left. The disinfectant—such as chlorine, chloramines, ozone, or UV—delivers a chemical or physical inactivation that kills or neutralizes those remaining microorganisms and provides a residual protection in the distribution system. Screening removes larger debris at the intake and doesn’t kill microbes. Coagulants and the coagulation/flocculation process help particles and microbes clump so they can be removed more easily, but they’re primarily for solid removal rather than inactivating pathogens.

The essential idea is that after filtration, a disinfection step is added to inactivate any pathogens that slip through the filtration barrier. Filtration lowers turbidity and removes many particles, and pathogens may still be present at low levels or attached to what’s left. The disinfectant—such as chlorine, chloramines, ozone, or UV—delivers a chemical or physical inactivation that kills or neutralizes those remaining microorganisms and provides a residual protection in the distribution system.

Screening removes larger debris at the intake and doesn’t kill microbes. Coagulants and the coagulation/flocculation process help particles and microbes clump so they can be removed more easily, but they’re primarily for solid removal rather than inactivating pathogens.

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