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OLga [1]
3 years ago
11

The first step in the sewage-treatment process is _____.

Social Studies
2 answers:
Finger [1]3 years ago
5 0
Primary treatment<span>. In the primary sedimentation stage, </span>sewage<span> flows through large tanks, commonly called "pre-settling basins", "primary sedimentation tanks" or "primary clarifiers". The tanks are used to settle sludge while grease and oils rise to the surface and are skimmed off.</span>
USPshnik [31]3 years ago
3 0

the correct answer is the screening of large particles

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