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Assuming I have data of BOD, COD and water discharge. How do I calculate the O2 requirement?

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closed as unclear what you're asking by arkaia, Daniel Griscom, Fred, gansub, Jan Doggen Nov 17 '16 at 9:08

Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

  • $\begingroup$ This is an ambiguous question. The COD chews up the matter using very strong oxidizers so that oxygen demand will in general be greater than the BOD. However it depends on what is being consumed. For example for table sugar the BOD and COD will be the same. But the COD will decompose polyethylene which the BOD won't touch. $\endgroup$ – MaxW Nov 16 '16 at 7:00
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    $\begingroup$ For the future, it would be great if someone edited in what COD/BOD are. $\endgroup$ – Daniel Griscom Nov 16 '16 at 12:09
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you can actually calculate the theoretical oxygen requirement using the following formula: O2 req (kgO2/d) = [Q * (S0-S) / (BOD5/BODL)]/ 1000 Where: Q= flowrate m3/day S0= infulent BOD/COD concentration (mg/L) S= efulent BOD/COD concentration (mg/L)

FYI Successful decreasing of BOD and COD can be obtain by using high volume Oxygen Generator such as Submersible Aeration

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