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DSBB combines gravity separation and non-blocking screen technology to capture trash, sediment, and hydrocarbons from stormwater.
DSBB captures and retains 100% of trash and debris equal to or greater than 5 mm in diameter and meets the California Regional Water Quality Control Board Full Capture Certification Requirements. Floating trash and debris are stored above the static water level where it can dry out between storms and can be easily removed during maintenance events.
With internal high-flow bypass, shallow vault design, and multiple sizes, it is the ideal product for sites with groundwater, utility, or bedrock constraints.
| FEATURES | BENEFITS |
|---|---|
| Dual-stage treatment system - separation and screening | Superior pollutant removal |
| Trash and debris stored above water | Easier maintenance while minimizing nutrient leaching, bacterial growth, and bad odors |
| Unimpeded high-flow path | In-line installation, eliminating the need for a diversion structure |
| Oil skimmer and optional hydrocarbon booms |
Superior hydrocarbon capture |
| Turbulence deflectors | Minimizes scour, especially during high flows |
DSBB has been evaluated by some of the most stringent stormwater technology evaluation organizations in North America, including:
Many municipalities have enacted specific trash control strategies in response to TMDLs or municipal stormwater permit requirements. To address these issues, stormwater managers, municipal officials, and other stakeholders need solutions like Contech's Catch Basin Inlet Filters, DSBB®, and CDS® hydrodynamic separators that can remove trash and TSS, which are easy to maintain and can easily be implemented in a retrofit scenario.
Our hydrodynamic separation products (including the CDS, Cascade Separator, SciCloneX, Vortechs, and Stormceptor Systems) are reliable, easy to install, and offer high-performance, proven, stormwater pollutant removal. The systems are widely accepted for effective solids removal and can be designed to achieve your site treatment goals - including TMDL requirements for TSS and trash.
Designing, manufacturing and installing high-volume stormwater detention and treatment systems requires expert engineering, planning, and logistical support to manage costs and keep the project on schedule and under budget. When you need a proven, large scale stormwater management system, “Go Big” with Contech.
Our hydrodynamic separators are frequently installed upstream of detention and infiltration systems as pretreatment devices. By capturing the majority of sediment, hydrocarbons and trash and debris upstream of the storage system, maintenance becomes much easier as material is congregated into a smaller device with clear access for cleanout. Additionally, by utilizing pretreatment upstream of infiltration systems, sediment that would have clogged the stone voids in the storage envelope surrounding the storage chamber can be captured before entering the storage system thus extending the longevity of the entire system.
Our hydrodynamic separation products are ideal solutions for preatreatment to rainwater harvesting. Not only do they improve the overall water quality, they also provide protect the pumps and controls from being overburdened with material that could clog and damage the mechanical system.
The DSBB is sized by matching the site’s required treatment flow rate and pollutant removal objective to the appropriate DSBB model. Page 5 of our DSBB brochure provides peak treatment flow rates for each model based on trash capture and TSS removal performance. The final selection also considers maximum pipe diameter, site hydraulics, layout constraints, and applicable regulatory requirements. Contact your local Contech Stormwater Consultant for site-specific sizing guidance.
The DSBB does not require a physical drop. The inlet and outlet pipes can enter and exit at the same invert elevation. However, hydraulic grade line considerations vary by model size and should be evaluated using project-specific data.
Yes. DSBB systems have been installed with flowlines 20 feet or more below grade. However, feasibility depends on site-specific conditions, including maintenance access, structural loading requirements, and other project considerations. Contact your local Contech Stormwater Consultant for guidance on your specific application.
The inlet and outlet pipe sizes a DSBB can accommodate depend on the DSBB model size, pipe material, and site-specific configuration. Contact your local Contech Stormwater Consultant for help evaluating your project conditions and selecting the appropriate configuration.
The material used in the DSBB screens is 304 stainless steel.
Our team is ready to provide you with expert advice and assistance on local regulatory requirements, resulting in faster approvals.
Our engineers can review your requirements, weigh all options, and recommend the optimal solution to integrate with your site designs.
Our engineers can assist by providing product specific engineering calculations such as hydraulics, buoyancy, foundation reactions, and unit sizing.
We can quickly provide engineer’s cost
estimates to assist with your solution
selection process.
Our engineers can provide site-specific drawings for proposals, project meetings, and submittals, helping you be more efficient with your time.
Contractors know time is money, so we provide preconstruction meetings, delivery coordination, and on-site installation support to ensure a timely, smooth installation.
