Waste Water Engineering
The sewers

All listed here
Must be laid at least 2 to 3 m deep to collect /water from the basements
Must be of adequate size to avoid over flow
Must flow under gravity ½ to ¾ full

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Waste Water Engineering
For treating the sewage of a large city, you will recommend

Sedimentation tanks with high rate trickling filters
A plant consisting of Imhoff tanks with low rate trickling filters
None of these
A sedimentation tank and an activated sludge treatment plant

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Waste Water Engineering
Stone ware pipes are

Hydraulically efficient because of their smooth interior surface
Highly resistant to sulphide corrosion
Especially suited to pressure pipes
Highly impervious

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