Effectiveness of the Debris Separating Baffle Box (DSBB)

Dual Stage Hydrodynamic Separation

California Full Capture Approval & New Jersey Corporation for Advanced Technology (NJCAT) Protocol Verification
To prove the system’s effectiveness, it has already been approved for “Full Capture” treatment by the California Water Resources Control Board. This means the Debris Separating Baffle Box (DSBB) has proven pollutant removal rates of 100% trash and debris down to 5 mm in size at a specified flow rate. Our standard design is full capture certified unlike other baffle boxes which have to deviate from their standard product offering to meet this specification.
In the fall of 2018, Bio Clean successfully completed third-party, independent testing under the New Jersey Department of Environmental Protection (NJDEP) testing protocol for hydrodynamic separators with outstanding results. In February of 2019 the DSBB received New Jersey Corporation for Advanced Technology (NJCAT) verification at a loading rate of 32.31 gpm/sq.ft. with 83.6% removal at a 125 micron average particle size. The system also passed the scour testing portion of the protocol and can be used online with internal bypass. Zach Kent, VP of Product Development & Regulatory Compliance adds, “We are very proud to be one of the few companies that only use third-party, independent ISO [International Standard Organization] certified laboratories to do our product testing.”

  • NJCAT Verification at a loading rate of 32.31 gpm/sq.ft.
  • 83.6% Removal at a 125 Micron Average Particle Size
  • Scour Testing: The DSBB also passed the scour testing portion of the NJCAT protocol, qualifying it for online use.

View Document:
NJCAT DSBB Verification Report Final

What is a Baffle Box?

Baffle boxes have long been used for treatment of stormwater runoff. They are technically a hydrodynamic separator but with the added benefit of being an efficient and effective gross pollutant/trash separator. This is usually accomplished utilizing an advanced screening type technology inserted above the standing water line.

History & Development of Stormwater Baffle Boxes

These trash type stormwater separating baffle boxes were first pioneered in Florida in the late ’90s where they were used to capture and separate trash and leaf matter in a dry state to prevent breakdown and nutrient leaching. In Florida, where toxic algae blooms are a major concern, the need to separate and keep organics dry is crucial. This is where separating type baffle boxes really differ from traditional round, swirl-type hydrodynamic separators. While ‘swirl’ separator systems are great for oils and TSS/SCC, they store trash and leaves in a wet state allowing the organics to break down, decay, and transform into a dissolved state in the water column that is later discharged to downstream rivers lakes and streams, while separating baffle boxes achieve just that – effective separation.

One of Bio Clean’s Most Successful & Reliable Stormwater Treatment Systems

In 2017, Bio Clean released its own innovative and effective version of the separating baffle box known as the Debris Separating Baffle Box (DSBB). This 5th generation baffle box is unlike any other. Water enters a primary chamber with a vertical splitter screen, which directs trash, leaves, debris, and organics to the sides of the system while allowing large sediments to settle in the sump chamber below. This configuration prevents sediments from getting into the screens which can cause clogging. The sediment-removed stormwater flows into the trash screens on each side of the system for capture and containment. The center of the system is fully open for easy maintenance and the entire screen system is made of stainless steel. “We use no aluminum or other metals that can oxidize or corrosively react with the stainless steel screens,” states Zach Kent.
All of the screens are made of a non-clogging, self-cleaning louver material which reduces maintenance requirements and ensures high flow rates over many years of operation. Zach Kent adds, “We are the only baffle box to offer non-clogging screen technology.”

The Debris Separating Baffle Box (DSBB) Stormwater System Advantages

  • Stores trash, debris, and organics in screening system separated from water below
  • Separation prevents odor, bacterial growth,
    nutrient leaching, and septic conditions
  • Shallow profile minimizes maintenance cost:
    – Less shoring
    – Perfect for areas with high ground water