2.5 MGD SBR WWTP

.55 MGD SBR WWTP

.8 MGD SBR WWTP

TANK APPLICATIONS

Precast post-tensioned concrete rectangular structures manufactured by Dutchland, Inc. are implemented for a variety of wastewater treatment systems processes, including SBR’s, Extended Aeration, Oxidation Ditches, MBR’s and more.

Dutchland, Inc. provides design/build extended aeration wastewater treatment plants, utilizing high quality equipment and complete process designs. Additional information is available for extended aeration plants designed and manufactured by Dutchland, Inc.

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INSTALLATION

• Precast concrete elements are manufactured at an NPCA certified facility.

• Precast concrete walls, corners, and tees are set on a poured-in-place slab within a receiving keyway. Alignment is checked with laser equipment.

• Temporary props are attached to the inner face of the tank and secured to the base. Top-of-wall brackets placed at the panel joints insure panel alignment.

• Tendons are threaded into the ducts and partial tension is applied to all tendons.

• Walkways are set into place and partial tension is applied.

• Joint grout is pumped into the joint cavities.

• Final tensioning is applied to all tendons.

• Base to wall elastomeric sealants are applied.

• Structures are checked and insured for water-tightness.

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1.0 MGD Oxidation Ditch WWTP

.6 MGD Extended Aeration WWTP

3.0 MG Storm Water Retention and Pump Tank

STRUCTURAL SUPERIORITY

• All exterior and interior walls are designed for full water load on one side and empty on the other side, unless otherwise specified. All walls are designed in conformance with ACI 318 and ACI 350.

• Precast post-tensioned rectangular tanks are capable of being completely in-ground or primarily above grade with the base slab below frost level.

• Post-tensioned walk-ways provide a structural upper fixed beam. Without the need for conventional cantilever design requirements, the wall thickness of deep structures can be reduced.

• The outer walls form the superstructure of a multi-compartmented tank. Corner sections connect the superstructure walls. Tee sections and interior walls compartmentalize the superstructure. Horizontal tendons are inserted and tensioned at the corners and tees. Finally the walkways are installed and tensioned.

• Due to the depth of the walls and utilization of superstructure walls with interior walls, the resulting footprint is much smaller than traditional designs.

DURABILITY

All wall panels are solid and of continuous thickness.

All walls are cast horizontally in steel forms, providing an extraordinarily dense impermeable exterior. Spalling which is typically associated with cast-in-place concrete is virtually eliminated.

Maintenance associated with steel tankage (dewatering, sandblasting, repainting) is not required.

Exterior coatings are not required. Penetrating stain or decorative coatings are available upon request.

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ABOUT DUTCHLAND, INC.

• Dutchland, Inc. is a NPCA certified precast concrete manufacturing facility with ACI certified Quality Control personnel and PTI certified installation personnel.

• Dutchland, Inc. is recognized by NPCA as operating one of the highest quality manufacturing facilities in the United States.

• All precast concrete is manufactured in Lancaster County Pennsylvania and delivered to the job site.

• Dutchland, Inc. specializes in many types of precast post-tensioned concrete structures, including circular, rectangular, and elliptical structures.

• Precast post-tensioned concrete structures are used for water storage, wastewater treatment, effluent storage, and many other purposes.

REASONS TO CHOOSE PRECAST POST-TENSIONED TANKS

1. Precast post-tensioned tanks are one of the most cost-effective options available. Precast post-tensioned tanks are competitive with most varieties of steel tanks without the future costly maintenance associated with steel tanks.

2. Precast post-tensioned concrete tanks are easily implemented for a variety of uses and types of wastewater treatment.

3. Precast post-tensioned concrete tanks generally cost less than cast-in-place tanks and are constructed utilizing superior construction methods.

4. Precast post-tensioned tanks are virtually maintenance free for decades and are designed to stay in continuous service, eliminating costly maintenance and down time.

5. Precast post-tensioned tanks can be constructed above ground (with the base slab below frost), completely buried, or anywhere between. Differential backfill is no problem.

6. Minimal site space is required for construction, resulting in less site work. Wall panels and other key elements are manufactured in a climate controlled production facility rather than on site.

7. Less time is typically required to construct precast post-tensioned tanks.

8. Additional information is available about post-tensioning upon request or at our web site.

Circular precast post-tensioned concrete structures are utilized for a variety of water and wastewater purposes, including potable water storage, fire protection water storage, clarifiers, digesters, and more. Circular tanks can also be configured to be a tank within a tank.Exterior and interior walls are post-tensioned and are designed for differential loading.

Additional information is available upon request for rectangular Precast Post-tensioned Concrete Structures.

DUTCHLAND, INC. FACILITY

PRECAST MANUFACTURING FACILITY