AP Environmental Scienceeasymcq1 pt
Secondary sewage treatment works by
A.bacteria digesting dissolved organic matter
B.boiling the water
C.adding chlorine only
D.filtering through sand only
Explanation
Core Concept
Aeration tanks feed microbes that consume the waste's organic load, converting it to CO₂ and settleable biomass.
Correct Answer
Abacteria digesting dissolved organic matter
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