BOD Biochemical Oxygen Demand
Biochemical Oxygen Demand (BOD) is a measure of the quantity of dissolved
oxygen used by bacteria as they break down organic wastes. In slow moving
and polluted rivers, much of the available dissolved oxygen is consumed
by bacteria, robbing other aquatic organisms of the dissolved oxygen needed
Submerge the small tube (0125) into the water sample. Carefully remove
the tube, keeping the tube full to the top. Cap the tube.
Wrap the rube with aluminum foil and store it in a dark place at
room temperature for 5 days.
Unwrap the tube. Add two Dissolved Oxygen TesTaO 0976) to the test
Cap the tube. Make sure there are no air bubbles. Invert until
tablets have disintegrated. Wait 5 min
Compare the color of the sample to the Dissolved Oxygen color chart..
The difference in the Dissolved Oxygen level between the uncovered
tube and the covered tube is the Biochemical Oxygen Demand (BOD) of
the water sample.