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Q: The processes of adding chemicals to induce aggregation and settling of finely divided suspended matter, colloidal substances etc. in water treatment plants is called:
  • A. filtration
  • B. clarification
  • C. aeration
  • D. plain sedimentation
Correct Answer: Option B - Clarification–The process of adding chemicals to induce aggregation and setting of finely divided suspended matter, colloidal substance etc. in water treatment plant is called clarification. Filtration–Economically effective in controlling guinea worm disease. • Filters are classified as– A. Slow san filter, Rapid sand filter (gravity filter) B. Pressure filter. Aeration–It is generally used for ground water and removes undesirable gasses. • It can also remove volatile liquid like phenols and humic acids. • It removes iron and manganese and it also decrease the acidity of water.
B. Clarification–The process of adding chemicals to induce aggregation and setting of finely divided suspended matter, colloidal substance etc. in water treatment plant is called clarification. Filtration–Economically effective in controlling guinea worm disease. • Filters are classified as– A. Slow san filter, Rapid sand filter (gravity filter) B. Pressure filter. Aeration–It is generally used for ground water and removes undesirable gasses. • It can also remove volatile liquid like phenols and humic acids. • It removes iron and manganese and it also decrease the acidity of water.

Explanations:

Clarification–The process of adding chemicals to induce aggregation and setting of finely divided suspended matter, colloidal substance etc. in water treatment plant is called clarification. Filtration–Economically effective in controlling guinea worm disease. • Filters are classified as– A. Slow san filter, Rapid sand filter (gravity filter) B. Pressure filter. Aeration–It is generally used for ground water and removes undesirable gasses. • It can also remove volatile liquid like phenols and humic acids. • It removes iron and manganese and it also decrease the acidity of water.