Waste Water Engineering
The effluent of a septic tank is

Fit for discharge into any open drain
As good as that from a complete treatment
None of these
Foul and contains dissolved and suspended solids

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Waste Water Engineering
Traps

Dissolve the foul gases
Are water seals which prevent the entry of foul gases
Are used to trap the rats entering sewers
Create symphonic action to increase the quick disposal of sewerage

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