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Biochemical Oxygen Demand Calculation Examples. It is not a precise quantitative test although it is widely used as an indication of the organic quality of water. It is most commonly expressed in milligrams of oxygen. Biochemical Oxygen Demand BOD is the amount of oxygen expressed in mgL or parts per million ppm that bacteria take from water when they oxidize organic matter. 611 Biochemical Oxygen Demand Bod The BOD test gives an indication of the oxygen required to degrade biochemically any organic matter present in a water as well as the oxygen needed to oxidize inorganic materials such as sulphides.
Biochemical Oxygen Demand BOD is the amount of oxygen expressed in mgL or parts per million ppm that bacteria take from water when they oxidize organic matter. Print Biochemical Oxygen Demandtif 33 pages Author. Add an additional 01 mL of nutrients for each 50 mL of sample used in excess of 150 mL. 300 ml bottles are used. Therefore i t is used to measure the amount of certain type of organic water pollution BOD is calculated by keeping a sample of water containing a known amount of oxygen for five days at 20 C. For example if the sample size is 200 ml an additional 02 ml is required.
The test provides an empirical comparison of the relative oxygen requirements of surface waters wastewaters and effluents.
Biochemical Oxygen Demand Rate constant 𝑘1 is dependent on temperature it can be calculated as 𝑘1𝑡 𝑘1 20⁰Ɵ 𝑇20 where Ɵ1047 The value of Ɵ is temperature dependent 15. 300 ml bottles are used. Tygon and black rubber can add oxygen demand to the water. Biological Oxygen Demand What is biological oxygen demand BOD. They may be dissolved like sugar or. Biochemical Oxygen Demand Rate constant 𝑘1 is dependent on temperature it can be calculated as 𝑘1𝑡 𝑘1 20⁰Ɵ 𝑇20 where Ɵ1047 The value of Ɵ is temperature dependent 15.