Which of the following processes is NOT typically done during the primary and secondary treatment stages of wastewater?

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Biology · Environmental Science

Verified Solution4 OptionsUpdated: October 2026👁️1 View

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Inorganic impurities such as nitrates and phosphates are completely removed by simple chlorination.

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Answer 1

Sand, grit, and pebbles are made to settle by decreasing the speed of incoming wastewater.

Answer 2

Inorganic impurities such as nitrates and phosphates are completely removed by simple chlorination.

Answer 3

Wastewater enters a grit and sand removal tank.

Answer 4

Sludge is scraped out and a skimmer removes the grease.

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