Info:
BOD: Biochemical Oxygen Demand
BOD5 is the total amount of oxygen consumed by microorganisms during
the first five days of biodegradation
BOD5 = (DOi – Dof)/(P) this is the five-day BOD of a diluted sample
Where DOi = the initial dissolved oxygen (DO) of the diluted wastewater
DOf = the final DO of the diluted wastewater, 5 days later
P = the dilution fraction = (volume of
wastewater)/(volume of wastewater plus dilution water)
A standard BOD bottle holds 300 mL, so P is just the volume of
wastewater divided by 300 mL
5.23)
A single source of BOD causes an oxygen sag curve with a minimum
downstream DO equal to 6.0 mg/L. If the BOD of the waste is doubled
(without increasing the waste flow rate), what would be the new minimum
downstream DO? In both cases assume that the initial oxygen deficit just
below the source is zero and the saturated value of DO is 10 mg/L. (Note
that when the initial deficit is zero, the deficit at any point is
proportional to the initial BOD)
Chemistry Homework Solutions
#86791
Biochemical Oxygen Demand
Info:
BOD: Biochemical Oxygen Demand
BOD5 is the total amount of oxygen consumed by microorganisms during the first five days of biodegradation
BOD5 = (DOi – Dof)/(P) this is the five-day BOD of a diluted sample
Where DOi = the initial dissolved oxygen (DO) of the diluted wastewater
DOf = the final DO of the diluted wastewater, 5 days later
P = the dilution fraction = (volume of wastewater)/(volume of wastewater plus dilution water)
A standard BOD bottle holds 300 mL, so P is just the volume of wastewater divided by 300 mL
5.23)
A single source of BOD causes an oxygen sag curve with a minimum downstream DO equal to 6.0 mg/L. If the BOD of the waste is doubled (without increasing the waste flow rate), what would be the new minimum downstream DO? In both cases assume that the initial oxygen deficit just below the source is zero and the saturated value of DO is 10 mg/L. (Note that when the initial deficit is zero, the deficit at any point is proportional to the initial BOD)
Calculation of Biochemical Oxygen Demand
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