Waste Water Engineering
The temperature affects the

Viscosity of sewage
Biological activity of bacteria in sewage
All of these
Solubility of gases in sewage

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Waste Water Engineering
In the activated sludge process

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

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