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Select features of the CDS (Continuous Deflective Separation) Technologies Inc.

CDS Technologies, Inc. has several extensive systems available for advanced stormwater treatment. This device is becoming quite popular with the development industry in HRM, NS.

The CDS technology is unique. It has been the subject of intensive research by leading world research groups, such as UCLA (University of California, Los Angels), University of Portland, Oregon, CSIRO (Commonwealth Scientific & Industrial Organisation), Monash University, Australia and the CRCCH, Co-operative Research Centre for Catchment Hydrology), Australia.

Brief history of the CDS technology:

CDS Technologies designs, manufactures and installs Continuous Deflective Separation water pollution traps. These traps are a superior and cost effective technology to separate gross solids from liquids. Used in stormwater systems, sewer and combined sewer overflows and industrial processes, they will prevent pollution from reaching receiving waters.

The company can assist in formulating pollution-preventing urban stormwater management plans, for wet and dry weather flows, as well as providing primary screening services at sewer and combined sewer overflow release points. CDS Technologies’ product details, including traps for eliminating pollution from stormwater runoff and improving the quality of ocean and river waters can be found in CDS Technologies, Inc.

The development of a non-blocking, non-mechanical screening system that can process high flows (up to 300 cfs) enables the effective use of advanced process applications that depend on screened influent for successful operation. There are many applications in the water and wastewater industries.

Recommendation on possible applications/constraints of the CDS device from Walt Stein, P.E., Manager - Project Development, CDS Technologies, Inc., CA 95037:

Stormwater Applications:

• Treatment of stormwater runoff from residential, commercial and industrial land uses to remove: Trash, debris, vegetation, coarse and medium sediments and some fine sediments.

• Treatment of stormwater runoff from parking lots and vehicle service and storage facilities to: Capture oil and grease using sorbents within the separation chamber.

• Protect stormwater pumping facilities from the negative impacts of rock, coarse & medium sediment, grit, trash and debris.

• Pre-treatment: Infiltration and direct filtration systems; Adsorption/absorption processes; Oil/water separators; Wetlands, ponds & detention basins.

CSO/SSO Applications:

• CDS's non-blocking screening system is also being applied to treat the overflows from both combined storm/sewer and sanitary sewers to eliminat floatables. Three CDS CSO units have been installed by the Louisville and Jefferson County Metropolitan Sewer District (MSD) to treat CSOs.
  
  
  • MSD has also received the first mobile CDS unit to be transported to specific sites in the collection system to treat storm/sewage overflows.
    
• In Brisbane, Australia, a CDS unit has been successfully screening an SSO and this has led to another SSO unit being constructed in Sydney.
• Additionally, the United States EPA's Wet Weather Research program is presently evaluating a CDS unit installed at the headworks of the Rockland County Sewer District's waste water treatment plant.

Integrating Constructed Wetlands With Stormwater Management

An example of a CDS device in series with a constructed wetland is illustrated in the PDF document of Monash University, Managing Urban Stormwater Using Constructed Wetlands.

A typical stormwater management system--- Figure 1

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