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Cattle waste has COD several times higher than BOD because of

  1. A
    high levels of fibre.
  2. B
    high levels of microflora.
  3. C
    high levels of cellulose, lignin and fibre.
  4. D
    All of the above

Solution & Step-by-step Explanation

Chemical Oxygen Demand () measures the total amount of chemically oxidizable organic matter, containing both biodegradable and non-biodegradable compounds. Biochemical Oxygen Demand () only quantifies the biologically degradable portion. Because cattle waste contains massive proportions of complex, non-biodegradable plant compounds such as cellulose, hemicellulose, lignin, and tough structural fibers, its value is significantly higher than its value.

Practice this question

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Cattle waste has COD several times higher than BOD because of
A
high levels of fibre.
B
high levels of microflora.
C
high levels of cellulose, lignin and fibre.
D
All of the above

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Water PollutionWaste ManagementCOD and BOD

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