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How Wastewater From Your Bathroom And Kitchen Is Treated Before It Is Discharged Into The Sea?

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( only if it goes into the main sewer) First, the solids are removed by filters and settling tanks. Then, the liquid is oxygenated to remove bacteria. When it is around 90% pure (pure enough to drink), it is discharged into the local water course to be used again or else it would make its way into the sea.

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