Question

What is meant by Biochemical oxygen?

Answer 1

the oxygen used in meeting the metabolic needs of aerobic microorganisms in water that are rich in organic matter (as water polluted with sewage) —are also called biological oxygen demand

Answer 2

Biochemical oxygen is the amount of dissolved oxygen needed by aerobic decomposers to break down the organic materials in a given volume of water at a certain temperature over a specified time period; if oxygen levels are depleted, fish and other animals die.