Waste Water Engineering
In the activated sludge process

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

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Waste Water Engineering
Traps

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

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