Question

Tertiary treatment in sewage treatment is also known as __________.
Fill in the blank.

Answer 1

the final or advanced treatment...........hope it is correct...

Answer 2

Hey mate!

Here's your answer!!
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-»-»-»-»-»Tertiary treatment in sewage or wastewater treatment is also known as 【Advanced Treatment】.

-»-»-»-»-»This process removes the nutrients such as phosphorus and nitrogen and organic matter from the waste water.
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$\boxed{Hope /: it /: helps /: you!}$