A BOD analysis was conducted on a partially-treated sewage at 25°C. Only 20% of the volumeof BOD test incubator was filled with thesewage, and the dissolved oxygen values listedbelow were measured.TimeDissolved oxygen (mg/L)timeO123456Dissolved oxyen (mg/L)8.57.76.54.83.5??By considering minimum dissolved oxygen atday 6 is valid for BOD test, determine thefollowing:(i) Reaction rate K25.(ii) 25BOD5 from the drawn graph.(iii) 30BOD3.(iv) COD of the sample.

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A BOD analysis was conducted on a partially- treated sewage at 25°C. Only 20% of the volume of BOD test incubator was filled with the sewage, and the dissolved oxygen values listed below were measured. Time Dissolved oxygen (mg/L) time 0 1 2 3 4 5 6 Dissolved oxyen (mg/L) 8.5 7.7 6.5 4.8 3.5 ? ? By considering minimum dissolved oxygen at day 6 is valid for BOD test, determine the following: (i) Reaction rate K25. (ii) 25BOD5 from the drawn graph. (iii) 30BOD3. (iv) COD of the sample.

A BOD analysis was conducted on a partially- treated sewage at 25°C. Only 20% of the volume of BOD test incubator was filled with the sewage, and the dissolved oxygen values listed below were measured. Time Dissolved oxygen (mg/L) time 0 1 2 3 4 5 6 Dissolved oxyen (mg/L) 8.5 7.7 6.5 4.8 3.5 ? ? By considering minimum dissolved oxygen at day 6 is valid for BOD test, determine the following: (i) Reaction rate K25. (ii) 25BOD5 from the drawn graph. (iii) 30BOD3. (iv) COD of the sample.

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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