My BOD seed contribution is too high. How can I lower it?

Document ID

Document ID TE917

Published Date

Published Date 27/05/2017
Question
My BOD seed contribution is too high. How can I lower it?
Summary
BOD seed contribution too high
Answer
It is not vital that your seed amount is exactly as specified in Standard Methods (seed contribution of 0.6 - 1.0 mg/L oxygen depletion). If more seed is required to reach a GGA BOD value of 198 +/- 30.5 mg/L, then that is acceptable according to Standard Methods.
If you want the seed contribution to be exactly within the Standard Methods specification, then change the seed material. Artificial or freeze-dried seed often do not deplete enough GGA even when a contribution of greater than 1.0 mg/L is used.