Question

What happens when more sewage is dumped into water? (1 Point) a. BOD increases b. BOD decreases c. BOD remains the same d. BOD changes to COD​

Answer 1

Answer:

Option A

Explanation:

When more sewage is dumped into water, the Biological Oxygen Demand (BOD) increases.

Answer 2

Raw sewage contains a variety of dissolved and suspended impurities. The organic materials are food and vegetable waste. When that waste hits the water, microorganisms begin to decompose the materials. That uses up some of the dissolved oxygen in the water because those microorganisms use it in their metabolism