Calculation BOD (1)
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Transcript of Calculation BOD (1)
RESULTS & CALCULATIONBIOCHEMICAL OXYGEN DEMAND ( BOD)
Date: 20/3/14
Time: 9:00 A.M.
Analyst:
From the experiment we can determine the volume of BOD3, for this sample at the end of this experiment
Sample Details:
Source: Waste water (Lake)
pH0C
6.8816.1
Pretreatment:
Alkalinity/Acidity
Sample Volume : -300 mL
I N NaoH : -I N N2SO4: -
Comments: This water sample already neutral with pH value is 6.88
So, the water sample don't have to neutralized
Sample TypeSample IDVolume Sample( mL)
DilutionFactorInitial DO(mg/L)Final DO( mg/L)DO Depletion( mg/L)BOD(mg/L)
Blank
300-6.705.531.17-
BOD3Bottle 23000.00676.805.810.99147.76
BOD3Bottle 43000.01336.815.62
1.1989.47
BOD3Bottle 63000.02006.805.70
1.1055.00
BOD3Bottle 83000.02676.855.66
1.1944.57
BOD3Bottle 103000.03336.845.74
1.133.03
CALCULATION 1) DO Depletion (mg/L)Example: Bottle 2 = Initial DO Final DO = 6.80 -5.81 = 0.99 mg/L
2) Dilution factorExample: Bottle 2 = simple ID /volume sample =2/300 =0.0067
AVERAGE BOD =
Example:
Bottle 2 =
= mg/L
Cancelled Data/ Result: Average BOD = mg/L
= mg/L = 73.97 mg/L