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BOD stands for

  • A.biochemical oxygen demand
  • B.bacterial organic decomposition
  • C.biological organism density
  • D.buffered oxidation degree

Answer: A

Biochemical oxygen demand measures the oxygen that microorganisms consume while degrading the organic matter in a sample, so it is an indirect measure of how much biodegradable material the water carries. It is the central number in judging both sewage strength and treatment performance.

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