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Chemical oxygen demand (COD) is measured through the reaction of organic compounds with potassium dichromate forming chromium (III) ion. The computation of COD is in the following: - 8000(а — b) COD = -× NormalityofFAS A

Chemical oxygen demand (COD) is measured through the reaction of organic compounds with potassium dichromate forming chromium (III) ion. The computation of COD is in the following: - 8000(а — b) COD = -× NormalityofFAS A

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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5. Question number (5) WASTEWATER ENGINEERING Civil Engineering Clear handwriting please

Chemical oxygen demand (COD) is measured through the reaction of organic compounds with potassium dichromate forming chromium (III) ion. The computation of COD is in the following: - 8000(а -b) COD = × NormalityofFAS A Where: COD = chemical oxygen demand, mg/L a = amount of ferrous ammonium sulphate titrant added to blank, mL b = amount of titrant added to sample, mL =volume of sample, mL 8000 = multiplier to express COD in mg/L of oxygen a. An influent of domestic wastewater sample was collected from Taman Universiti oxidation pond treatment system. The amount of the FAS titrant of 0.545 N added was 37.8 mL and 10.7 mL for blank and sample, respectively. Determine the COD of the wastewater when the volume used for the titration is 200 mL but was diluted 5 times before conducting the COD test.
Transcribed Image Text:Chemical oxygen demand (COD) is measured through the reaction of organic compounds with potassium dichromate forming chromium (III) ion. The computation of COD is in the following: - 8000(а -b) COD = × NormalityofFAS A Where: COD = chemical oxygen demand, mg/L a = amount of ferrous ammonium sulphate titrant added to blank, mL b = amount of titrant added to sample, mL =volume of sample, mL 8000 = multiplier to express COD in mg/L of oxygen a. An influent of domestic wastewater sample was collected from Taman Universiti oxidation pond treatment system. The amount of the FAS titrant of 0.545 N added was 37.8 mL and 10.7 mL for blank and sample, respectively. Determine the COD of the wastewater when the volume used for the titration is 200 mL but was diluted 5 times before conducting the COD test.
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