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1. A BOD analysis was conducted on a treated sewage at 20°C. A quarter volume of sewage portion was added for the BOD an
Posted: Thu Apr 28, 2022 3:35 pm
by answerhappygod
- 1 A Bod Analysis Was Conducted On A Treated Sewage At 20 C A Quarter Volume Of Sewage Portion Was Added For The Bod An 1 (25.75 KiB) Viewed 28 times
1. A BOD analysis was conducted on a treated sewage at 20°C. A quarter volume of sewage portion was added for the BOD analysis and the dissolved oxygen values listed below were measured (Table 1.0). By considering minimum dissolved oxygen at day-7 is valid for BOD test, determine the following: Table 1.0: Dissolved oxygen values Time (t) Dissolved Oxygen (mg/L) 0 8.3 1 6.7 2 5.4 3 4.8 4 3.9 5 ? 6 2.2 7 ? Reaction rate K30 6) BODs at 20°C based on the drawn graph. (c) BODat 30°C d) Estimate the COD for the tested sample. Comment your answer. (10 marks)