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BOD and COD of Sewage Water Video Lecture | Civil Engineering Optional Notes for UPSC

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FAQs on BOD and COD of Sewage Water Video Lecture - Civil Engineering Optional Notes for UPSC

1. What is the difference between BOD and COD in sewage water?
Ans. Biochemical Oxygen Demand (BOD) measures the amount of oxygen consumed by bacteria while decomposing organic matter in water, whereas Chemical Oxygen Demand (COD) measures the amount of oxygen required to oxidize all organic and inorganic substances in water.
2. How are BOD and COD values used to assess the pollution level of sewage water?
Ans. BOD and COD values are indicators of the organic load present in sewage water. Higher BOD and COD values indicate higher levels of organic pollutants, which can lead to oxygen depletion in water bodies.
3. What are the acceptable BOD and COD levels for sewage water discharge into the environment?
Ans. The acceptable BOD levels for sewage water discharge are typically below 30 mg/L, while COD levels should be below 250 mg/L to prevent harmful effects on aquatic life and water quality.
4. How can BOD and COD levels in sewage water be reduced before discharge?
Ans. BOD and COD levels in sewage water can be reduced through various treatment processes such as biological treatment, chemical oxidation, and advanced filtration methods to remove organic pollutants and improve water quality.
5. Why is it important to monitor BOD and COD levels in sewage water treatment plants regularly?
Ans. Regular monitoring of BOD and COD levels in sewage water treatment plants is essential to ensure compliance with environmental regulations, prevent water pollution, and protect aquatic ecosystems from the harmful effects of organic pollutants.
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