A 5-day BOD test was conducted on a wastewater sample. 50 mL of wastewater sample was added and diluted with dilution water into a 300 mL BOD incubation bottle. The initial dissolved oxygen (DO) of the diluted sample was 6.8 mg/L, and the final DO after 5 days was 1.9 mg/L. The corresponding initial and final DO of the dilution water (blank) was 7.1 mg/L and 6.9 mg/L, respectively. Calculate the BOD5 and COD values of the wastewater sample, given the rate constant of BOD was 0.3/day. (Hint: L =
A 5-day BOD test was conducted on a wastewater sample. 50 mL of wastewater sample was added and diluted with dilution water into a 300 mL BOD incubation bottle. The initial dissolved oxygen (DO) of the diluted sample was 6.8 mg/L, and the final DO after 5 days was 1.9 mg/L. The corresponding initial and final DO of the dilution water (blank) was 7.1 mg/L and 6.9 mg/L, respectively. Calculate the BOD5 and COD values of the wastewater sample, given the rate constant of BOD was 0.3/day. (Hint: L =
May 1, 2023
numerade.com
BOD (Biochemical Oxygen Demand) is an important parameter when measuring for the quality of water bodies and the efficiency of water treatment plants by determining the degradation of carbons. Using the official method of BOD5 the concentration of dissolved oxygen will be measured in diluted samples before and after incubation. When performing the “BOD self-check measurement” in a closed respirometer the absorption of the carbon leads to a gaugeable pressure change. In both cases the samples hav
3:25
BOD (Biochemical Oxygen Demand) is an important parameter when measuring for the quality of water bodies and the efficiency of water treatment plants by determining the degradation of carbons. Using the official method of BOD5 the concentration of dissolved oxygen will be measured in diluted samples before and after incubation. When performing the “BOD self-check measurement” in a closed respirometer the absorption of the carbon leads to a gaugeable pressure change. In both cases the samples hav
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