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Q: Which one of the following is most important parameter for the removal of discrete particles in design of continuous flow rectangular sedimentation tank?
  • A. Depth of tank
  • B. Length of tank
  • C. Surface overflow rate
  • D. Temperature of water to be treated
Correct Answer: Option C - –Tanks in which flow of the water are insured to be continuous either in vertical on in horizontal in order to carry out sedimentation, are known as continuous flow type sedimentation tank. – Setting velocity of concern size of particle is referred as 'surface over flow rate' this surface overflow rate decides the efficiency of the sedimentation tank. Surface over flow rate Type of sedimentation 12000-18000 Plain sedimentation 24000-30000 Coagulation aided sedimentation
C. –Tanks in which flow of the water are insured to be continuous either in vertical on in horizontal in order to carry out sedimentation, are known as continuous flow type sedimentation tank. – Setting velocity of concern size of particle is referred as 'surface over flow rate' this surface overflow rate decides the efficiency of the sedimentation tank. Surface over flow rate Type of sedimentation 12000-18000 Plain sedimentation 24000-30000 Coagulation aided sedimentation

Explanations:

–Tanks in which flow of the water are insured to be continuous either in vertical on in horizontal in order to carry out sedimentation, are known as continuous flow type sedimentation tank. – Setting velocity of concern size of particle is referred as 'surface over flow rate' this surface overflow rate decides the efficiency of the sedimentation tank. Surface over flow rate Type of sedimentation 12000-18000 Plain sedimentation 24000-30000 Coagulation aided sedimentation