Collection Headers

FIG. 7.17.11 Floating-bridge siphon collector. (Courtesy of Leopold Co., Division of Sybron Corp.)

tangular tanks are on the opposite end of the inlet structure. Environmental engineers can use different weir configurations in rectangular basins to obtain a beneficial weir length. Figure 7.17.9 shows typical sedimentation tank outlets.

In circular clarifiers, the outlet weir can be near the center of the clarifier or along the periphery as shown in Figure 7.17.8. The center weir generally provides a high-velocity gradient that can result in solids carryover.

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