Question
Explain BOD and its effects on aquatic ecosystem.
✓
Answer
- BOD is the amount of dissolved oxygen required by microorganisms for decomposing the organic matter present in water.
- This can be measured by chemical testing and is expressed in milligram of oxygen per litre (nigT) of water.
- If BOD of water is high, it denotes that the water is highly polluted with decomposing organic matter.
- High BOD shows that water is not potable but is polluted with microorganisms and organic debris.
Waters with higher BOD will also cause death of resident aquatic organisms. - Lower BOD on the other hand can vouch for cleaner water.
- BOD is an indicator of polluted ecosystem.
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