Debris Separating Baffle Box (DSBB) Stormwater Treatment

The Debris Separating Baffle Box (DSBB) is an advanced stormwater treatment system utilizing a non-clogging screen technology and separation to capture pollutants from stormwater. The non-clogging screening system stores trash and debris above the sedimentation chambers, minimizing nutrient leaching, bacterial growth, bad odors, and allows for easier maintenance.

The DSBB combines gravity separation and non-blocking screen technology to capture trash, sediment, and hydrocarbons from stormwater.

The 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.

• As runoff enters the vault, the splitter screen directs flows to the filtration screens and provides additional screen flow capacity.
• The filtration screens collect and store trash, debris, organics, and oxygen-demanding substances above standing water.
• The turbulence deflectors located below the screens prevent the resuspension of captured pollutants.
• Sediment is collected in the sediment chambers, maximizing TSS removal and eliminating scouring during extreme flow rates.
• The skimmer and boom collect hydrocarbons and control flow velocity, which improves removal efficiency.

FEATURES

Dual-stage treatment system - separation and screening

Trash and debris stored above water

Unimpeded high-flow path

Oil skimmer and optional hydrocarbon
booms

Turbulence deflectors

BENEFITS

Superior pollutant removal

Easier maintenance while minimizing nutrient leaching, bacterial growth, and bad odors

In-line installation, eliminating the need for a diversion structure

Superior hydrocarbon capture

Minimizes scour, especially during high flows

DSBB has been evaluated by some of the most stringent stormwater technology evaluation organizations in North America, including:

• New Jersey Department of Environmental Protection (NJDEP)
• New Jersey Corporation for Advanced Technology (NJCAT) Verification
• California Water Resources Control Board, Full Capture Certification

• Maintenance can be conducted above ground with a standard vacuum truck through a manhole or hatch.
• The screen system allows gross solids to be removed without vacuuming out water or sediment chambers. Screen systems are hinged for easy access to sediments collected in lower chambers.
• Contech has a network of Certified Maintenance Providers to provide maintenance on the DSBB and other stormwater BMP’s.

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