Published by:
CGP EDU Academic Team
Published on: August 13, 2026
Refer to the given figure following composition of waste water. In the figure, 1, 2 and 3 are showing types of impurities. Which one is most difficult to remove?
(1) Suspended solids, e.g., sand, silt and clay.
(2) Colloidal material, e.g., Fecal matter, bacteria, cloth and paper fibres.
(3) Dissolved materials, e.g., nutrients (nitrate, ammonia, phosphate, sodium, calcium). Impurities 0.1%
Text Solution
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