Waste Water Engineering
In sewers the highest non-scouring velocity is achieved in

Glazed bricks sewers
Cast iron sewers
Stone ware sewers
Cement concrete sewers

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Waste Water Engineering
The clarigesters are

Circular septic tanks
Circular Imhoff double storey tanks without bottom hoppers
Rectangular septic tanks
Circular Imhoff double tanks with bottom hoppers

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