Q17 of 55 Page 113

Which one of the following impurities is easiest to remove from wastewater?

The types of impurities found in waste water are :-


• Suspended impurities


• Colloidal impurities


• Dissolved impurities


• Microorganisms


Out of these only suspended impurities can be removed most easily as they are solid and solids can be extracted from liquid more easily then colloidal and dissolved impurities.

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