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SPECIAL PUBLICATION SJ2008-SP11 - page 39 / 48

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Literature Review & Summary Report Design Basis Memorandum St. Johns River Water Management District Contract # SK940AA

BCI Project No. 19-15089 September 2007 Page 31

4.5.2 ID&D® - Integrated Dredging & Dewatering

Advantages:

Brennan’s Integrated Dredging & Dewatering – ID&D®, created in alliance with Phoenix Process Equipment Co., is an integrated system providing dredging through dewatering as a continuous process. As with most mechanical dewatering systems the need for settling basins, return water systems, and containment area restoration, as well as the piping and pumps to the settling area is eliminated. The required operational site, or footprint, is generally small, enabling the mobile ID&D® dewatering unit to set up in small parking lots, on golf courses, or on barges.

The system handles a variety of automated reducing the operating staff

sediment to two.

types, grain sizes and debris, and is well Computer controlled polymer addition is

integrated with real-time dredge slurry solids measurement, optimizing polymer use.

Because a

pre-thickening step can be used prior to providing material, which may be trucked

final dewatering, solids of 40-45% or conveyed to a disposal area.

may

be

achieved

Disadvantages:

Return water will likely need treatment to remove dissolved phosphates prior to reintroduction to the lake.

4.5.3 Eagle North America – Extended Contracting Service

Advantages:

Each project developed by EAGLE NORTH AMERICA may be customized to include all required processes such as screening, thickening, sand removal, washing, and drying. Most of Eagle North America’s dewatering services are performed using belt press technology, but dewatering is customized for the client using the most suitable technologies including:

  • High pressure belt press

  • Centrifuge

  • Plate and frame filter press

  • Screw press

  • Grinders, screens, hydrocyclones, tanks

  • Geotube technology

Eagle North America’s portable units are skid mounted to allow for easy transport and quick configuration, and all skids feature new equipment rather than reconditioned equipment.

As an integrated dewatering system the need for settling basins, return water systems, and containment area restoration, as well as the piping and pumps to the settling area is eliminated. The required operational site, or footprint, is generally small, enabling the mobile dewatering unit to set up in limited area.

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