Multiple choice

From amongst the following sewage treatment options, largest land requirements for a given discharge will be needed for

  1. trickling filter

  2. anaerobic pond

  3. oxidation ditch

  4. oxidation pond
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

 Oxidation pond - Standing pond with minimum depth, so the sunlight can penetrate into the tank for photosynthesis process at the bottom of the tank and provide oxygen for aerobic oxidation. For less depth, more surface area required and having large detention time.

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