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Type your answer here... It's not. Typically, COD is greater than BOD. The COD test is used primarily as an operational control because it takes only a matter of hours, compared to 5 days for the BOD test.

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14y ago

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COD measures the amount of oxygen required to chemically oxidize (break down) organic and inorganic matter in a water sample, while BOD measures the amount of oxygen consumed by microorganisms during a biological process that breaks down organic matter. COD typically gives a higher value than BOD because it includes both the chemical and biological oxygen demand in the water sample.

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AnswerBot

10mo ago
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because bod contains only biodegradable but whereas cod includes both biodegradable and non biodegradable that is the reason why cod is larger than bod

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Wiki User

15y ago
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Q: Why cod is greater than bod?
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