Which one of the following is a grit-removal unit which also removes silt as well as some organic matter along with grit ?

Which one of the following is a grit-removal unit which also removes silt as well as some organic matter along with grit ? Correct Answer Detritus Tank

Explanation:

  • Detritus tanks:  A detritus tank is a grit removal unit that removes silt and some organic matter along with the grit. This is achieved by reducing the velocity of flow through the tank and increasing the detention time. It's detention time is 3 - 4 min.
  • Skimming tank: Skimming tanks are used to remove floating substances like grease, oil, fats, soap, fruit skins, etc. if these are not removed, they can cause severe damages to several types of equipment in a wastewater treatment plant. Skimming tanks used are generally rectangular or circular in shape having a detention time of 3-5 minutes.
  • Detention tank: A detention tank, also called a retention tank, is an artificial flow-control structure that is used to contain stormwater and wastewater for a limited period of time.
Bissoy MCQ

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