Waste Water Engineering
The effluent of a septic tank is

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

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Waste Water Engineering
In the activated sludge process

Water is removed by centrifugal action
Sludge is activated by constant stirring
Aeration is done with an admixture of previously aerated sludge
Aeration is continued till stability

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