What should be done if the BOD Seed Contribution is too high or too low?

Document ID

Document ID TE917

Published Date

Published Date 08/20/2019
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Question
What should be done if the BOD Seed Contribution is too high or too low?
Summary
Troubleshooting tips for BOD Seed Contribution
Answer
When testing Biochemical Oxygen Demand (BOD), Standard Methods recommends that the seed contribution be 0.6 - 1.0 mg/L oxygen depletion, though this can be adjusted to ensure Glucose and Glutamic Acid (GGA) standards read 198 +/- 30.5 mg/L.

If the seed contribution is too low or too high, one can try changing the amount of seed used.  It may be necessary to change the seed material. In many cases, artificial or freeze-dried seeds do not deplete enough GGA, even when a contribution of greater than 1.0 mg/L is used.

For more information on different seed sources, please reference What kind of sources can seed be obtained for BOD testing?

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