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Waste Water Engineering

Waste Water Engineering
The porosity of sediments in sewer pipes, is usually taken as

0.011
0.013
0.01
0.012

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Waste Water Engineering
The minimum diameter of sewer to be adopted is

25 cm
12.5 cm
10 cm
15 cm

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Waste Water Engineering
In sewers designed with self cleansing velocity,

The bottom is silted
Neither silting nor scouring occurs at the bottom
Both silting and scouring occur at the bottom
The bottom is scoured

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Waste Water Engineering
In detritus tanks,

Organic and inorganic materials are separated
All listed here
Detention period is kept 3 to 4 minutes
Flow velocity is kept 0.09 m/sec

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Waste Water Engineering
An inverted siphon is designed generally for

One pipe
Two pipes
Four pipes
Three pipes

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Waste Water Engineering
Before discharging the foul sewage into rivers, it is generally treated by

Screening
Sedimentation
All listed here
Oxidation

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