Question

Dissolved oxygen in water is very important for aquatic life. What processes are responsible for the reduction of dissolved oxygen in water?

Answer 1

The discharge of human sewage and organic waste from pulp and paper industry and presence of leaves, grass, trash etc. In water due to run-off result ‘ in phytoplankton growth. The microorganisms which decompose this organic matter need oxygen. Hence, the amount of oxygen in water of lakes etc. decreases.