Question :The primary treatment of waste water involves the removal of – InterviewSolution

1.	Question :The primary treatment of waste water involves the removal of
Answer» DISSOLVED impurities Stable particles Toxic substances Harmful bacteria Solution :Primary treatments basically involves physical REMOVAL of particles from sewage through: (i) filtration and (ii) sedimentation These are removed in stages : (i) Initially floating DEBRIS is removed by SEQUENTIAL filtration. (ii) Then the GRIT (soil and pebbles) are removed by sedimentation

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