EPA approved chemistries for National Pollutant Discharge Elimination System (NPDES) compliance monitoring listed under the following approved method: Standard Methods for the Examination of Water and Waste Water 22nd Edition (2012), Method 5210-B, 5-day BOD test
A major disadvantage of the BOD test
is the amount of time (5 days) required to obtain the results.
The samples were diluted using buffered dilution water, measured for dissolved oxygen and incubated at 20 [degrees] C (68 [degrees] F) for five days in a standard BOD test
The BOD test
thus represents a microcosm of the larger world we inhabit, and if we understand or measure that microcosm with only limited success, perhaps that's just a further reflection of our incomplete understanding of the world outside.
In automating the BOD test
, laboratories eliminate operator-to-operator variability, reduce operator involvement, and accurately control all process timing steps.
Other Hach devices include a system for running BOD tests
and downloading the stored data to a desktop computer.