Portland, Maine — First Defense High Capacity, a hydrodynamic separator for stormwater treatment from Hydro International, has now been certified for 50 percent Total Suspended Solids (TSS) removal by the New Jersey Department of Environmental Protection (NJDEP) — at the highest treatment loading rate in the industry. This advancement offers engineers and contractors the potential to save 40 percent more space on their site, helping to significantly reduce time and overall project costs.

First Defense High Capacity is also a highly adaptable online treatment system that works easily with large pipes, multiple inlet pipes, inlet grates and now contains a high capacity internal bypass for the conveyance of large peak flows, the company said.

“We’ve been designing advanced separation devices for decades but we’ve finally uncovered the secret to getting the highest loading rate through the smallest footprint,” said John Larson, Senior Project Engineer at Hydro International. “This system will be an important treatment option for any engineer needing to get the most out of a small and/or difficult site space.”

Systems are available in the following sizes and approved flow rates:

  • 4 feet — approved for up to 1.50/cfs
  • 6 feet — approved for up to 3.38/cfs
  • 8 feet — approved for up to 6.00/cfs 

For the convenience of specifying engineers who may need assistance in selecting an appropriate model size, the online sizing calculator enables effective configuration and sizing selections based on site-specific information entered by the user. Register at http://sizingcalculator.hydro-int.com/#!/login  to use the online sizing tool.

Engineers in New Jersey and any municipality following NJDEP regulations will now be permitted to specify the First Defense High Capacity. It is an enhanced version of the original First Defense, which is currently installed in thousands of locations throughout the U.S. and Canada.  

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