BOD is simply the portion of ...
Published by Sean Roop, Industrial and Engineering Consultants, LLC - Senior Water and Process Consultant
BOD is simply the portion of COD that is biodegradable. BOD is based on a five day test for oxygen uptake by biomass (activated sludge mixed liquor) as it consumes that portion of the COD. BOD is a small circl right now the bigger COD circle. Helps to visualize it, I think. Sean