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Pramila Pramila
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6 years ago
In a municipal wastewater treatment plant, the primary treatment step consists of ________.
A) filtering the sewage
B) chlorinating the sewage
C) adding bacteria to the sewage
D) leaving the sewage to sit in large tanks so suspended solids settle out of it
E) stirring the sewage to increase oxidation
Textbook 
Environment: The Science Behind the Stories, Canadian Edition

Environment: The Science Behind the Stories, Canadian Edition


Edition: 3rd
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