1.

The polluting strength sewage is usually characterized by its:A. BODB. nitrogen contentC. ozone contentD. eutrophication

Answer» Correct Answer - A
There will be more microbial activity in the sewage if more dead organic matter is present. More microbial activity will require more oxygen which, we call technically as biological oxygen demand. So the pollution strength of any sewage can be determined by its Biological Oxygen Demand (BOD).


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