Civil Engineering Reference
In-Depth Information
with 1,560 ft
2
(145 m
2
) of inclined tubes would be provided. Radial launders would
be added to improve the flow distribution in the basin, as shown in Figure 11-21.
Because the sidewater depth is only about 10 ft (3.1 m), the modules would be sub-
merged 2 ft (0.6 m).
HIGH-RATE CLARIFICATION
High-rate clarifiers are solids contact type units that incorporate settling plates or set-
tling tubes in the sedimentation zone. This technology has been developed by several
manufacturers and has been used in several potable water plants in the United States
and in many plants in Europe.
Infilco Degremont, Inc. (IDI), manufactures two high-rate clarification systems: the
Superpulsator Clarifier and the DensaDeg clarifier and thickener. Kruger manufacturers
one high-rate system called the Actiflo Process.
Superpulsator Clarifier
The Superpulsator can operate at loading rates up to 7,000 gpd / ft
2
(16.8 m / h). This
is achieved by combining the efficiency of the two processes. This system, shown in
Figures 11-22 and 11-23, is a modified sludge blanket clarifier with modified Lamella
plates to enhance floc formation and capture.
The water entering the clarifier is ''pulsed'' through the application of a vacuum in
an upstream vacuum chamber. The vacuum causes the water to rise in the vacuum
chamber, and the vacuum is released after it reaches a predetermined level. The water
''surges'' into the clarifier through the distribution conduit and laterals and causes the
Fig. 11-22.
An exploded view of the superpulsator clarifier illustrating typical components and
configuration (Courtesy of Infilco Degremont, Inc.)
