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Identify the incorrect statement regarding aeration process.

(a) It removes taste and odor

(b) It increases the dissolved oxygen content of water

(c) It increases the carbon dioxide content of water

(d) It is used for mixing chemicals with water

This question was addressed to me in an international level competition.

The query is from Types of Screens and Aerators topic in portion Unit Operations, Screening and Aeration of Environmental Engineering

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The correct option is (c) It increases the carbon dioxide content of water

Explanation: Aeration reduces the carbon dioxide content and corrosiveness of water and hence, raises the pH value of water.

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