Oxygen Flashcards
1
Q
Define biological oxygen demand (BOD) of water
A
BOD is the amount of oxygen required by a microbe to break down organic material at a specific temperature over a period of time.
2
Q
explain the procedure to measure
the standard BOD5 test in a laboratory.
A
Add wastewater sample to bottle of water (V=300ml) Measure BOD at t=0 Incubate at 20 degree C for 5 days Measure BOD at t=5 BODt=(DO-DOf)*Vbottle/Vsample
DO-DOf should be > 2mg/l
DOf > 1mg/l
