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A water treatment facility is designed to encourage the growth of microorganisms by holding wastewater until...

A water treatment facility is designed to encourage the growth of microorganisms by holding wastewater until organic material has been degraded by bacteria and other microorganisms. Which of the following terms explain this facility

a:Primary sewage treatment

b:Secondary sewage treatment

c:Tertiary sewage treatment
d:Biotic sewage treatment

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Answer #1

b. Secondary sewage treatment

Because sewage treatment are generally 3 types

Primary sewage treatment: In this stage holds the sewage in a basin and settles solids at the bottom, oil grease those light materials floats on the top.

Secondary sewage treatment : It is a biological processes in which removes biodegradable and oxygen demanding organic wastes through aerobic bacteria.

Tertiary sewage treatment In this stage removal of phosphates and nitrogen compounds through denitrification.

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