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प्रश्न
What do you mean by Biochemical Oxygen Demand (BOD)?
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उत्तर
Biochemical oxygen demand is the amount of oxygen required by bacteria to decompose organic matter in a certain volume of sample of water. Clean water would have a BOD value of less than 5 ppm, whereas highly polluted water has a BOD value of 17 ppm or more.
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संबंधित प्रश्न
Study the picture given below and answer the following questions :
What is a ‘Pollutant’ ? Explain the term.
List the three major constituents of sewage.
A lot of fish are dying near a sea shore. Describe any two possible causes.
True or False:
Sources of groundwater pollution include leaking sewer lines, pumping wells, landfills, fertilizer, and sludge.
With reference to the sources of water pollutants answer the following question:
In what way does the industrial waste pollute water?
Water is not necessary for our basic needs.
We should save water.
Contamination of water bodies by human activities is called ______ pollution.
A pond contains clean water. Which of the following activities will produce least pollution of water?
BOD is measure of ______.
