What is mean by water quality ? Explan the concept of DOD and COD?
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Explanation:
The biochemical Oxygen demand (BOD)represents of the dissolved oxygen (DO) consumed by biology Organism who they decompose Organic matter in water The Chemical Oxygen demand (COD)is the amount oxygen Consumed When the water sample is chemically oxidised.
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- COD is a metric for the amount of total organic molecules dissolved in waste water, whereas TOM is a metric for the amount of total organic molecules dissolved in drinking water.
- The notion of BOD arose as a result of towns dumping their waste water into bodies of water, which resulted in oxygen depletion and, eventually, death of the bodies of water.
- A measure of food value is the BOD/COD ratio.
- The higher the ratio, the more food there is and the lower the toxicity.
- The fact that biochemical oxygen demand (BOD) is caused by nitrates rather than dietary organics is the most crucial factor to remember.
- Even nitrates alone can deplete water's oxygen supply and encourage mosquito growth.
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