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The reduction of carbon dioxide by cascade aerators is in the range of __________

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in Environmental Engineering by (81.4k points)
The reduction of carbon dioxide by cascade aerators is in the range of __________

(a) 10-20%

(b) 20-30%

(c) 40-50%

(d) 50-60%

I got this question in exam.

My doubt stems from Types of Screens and Aerators topic in chapter Unit Operations, Screening and Aeration of Environmental Engineering

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Best answer
Right option is (d) 50-60%

Explanation: Cascade aerators are the gravity aerators in which water falls from 1-3m height such that it comes in contact with air and reduces carbon dioxide content to 50-60%.

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