(i) During BOD test conducted on a 5% dilution of waste, the following observations were taken. (1) DO of aerated water used for dilution = 3.6 mg/l (ii) DO of original sample = 0.8 mg/l. (iii) DO of diluted sample after 5 days incubation = 0.7 mg/l. Compute: (a) 5 days BOD and (b) Ultimate BOD. Assume deoxygenation constant at test temperature as 0.12 /day

(i) During BOD test conducted on a 5% dilution of waste, the following observations were taken. (1) DO of aerated water used for dilution = 3.6 mg/l (ii) DO of original sample = 0.8 mg/l. (iii) DO of diluted sample after 5 days incubation = 0.7 mg/l. Compute: (a) 5 days BOD and (b) Ultimate BOD. Assume deoxygenation constant at test temperature as 0.12 /day

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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Mechanical Processes

In civil engineering, the materials have to undergo a series of manufacturing processes before using them in construction and structural applications. These manufacturing processes form the foundation stone of mechanical processes. Some of the civil engineering materials such as bars, metallic beams, metallic columns, surveying equipment, earthmovers, overhead cranes, structural and construction components, and even cement that is the most fundamental construction component need to undergo different manufacturing processes before they are ready to use. These processes are mechanical.

Question

(i)
During BOD test conducted on a 5% dilution of waste, the following
observations
were taken.
(1) DO of aerated water used for dilution = 3.6 mg/l
(ii) DO of original sample = 0.8 mg/l.
(iii) DO of diluted sample after 5 days incubation = 0.7 mg/l.
Compute: (a) 5 days BOD and (b) Ultimate BOD.
Assume deoxygenation constant at test temperature as 0.12 /day

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