Name the three major sources of waste water. How is organic matter separated
from sewage during secondary treatment. give one method.
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There are three types of wastewater, or sewage: domestic sewage, industrial sewage, and storm sewage.
Trickling filter
The microorganisms absorb the organic matter in the sewage and stabilize it by aerobic metabolism, thereby removing oxygen-demanding substances from the sewage. Trickling filters remove up to 85 percent of organic pollutant from sewage.
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