Biological Characteristics Flashcards
1
Q
Actual quantity of free O2 present in water
A
Dissolved Oxygen
2
Q
DO concentration for healthy system
A
5-9 mg/L
3
Q
Measure of the amount of O2 needed to oxidize completely an organic matter whose chemical formula is known
A
Theoretical Oxygen Demand
4
Q
Oxygen needed for biodegradable organic
A
Biological Oxygen Demand (BOD)
5
Q
Oxygen needed for biodegradable and non-biodegradable organic
A
Chemical Oxygen Demand (COD)
6
Q
BOD is dependent on ____
A
specified time
temperature
pH
7
Q
The higher the BOD, the ________ polluted the water is
A
more
8
Q
Standard time for BOD
A
5 days
9
Q
Standard pH for BOD
A
pH 7
10
Q
Standard temperature for BOD
A
20°C
11
Q
Standard BOD bottle volume (total volume)
A
300 mL
12
Q
Oxidizing agents to measure COD
A
KMnO4 or K2Cr2O7
