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24 November, 07:00

Describe a main goal of primary treatment in a modern sewage treatment plant.

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  1. 24 November, 07:30
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    The goal is to remove both heavy solids and floating oils

    Explanation:

    Primary treatment consists of temporarily holding the sewage in a quiescent basin where heavy solids can settle to the bottom while oil, grease and lighter solids float to the surface. The settled and floating materials are removed and the remaining liquid may be discharged.
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