Kraken Filter

The Kraken® Filter is a state-of-the-art system utilizing advanced membrane filtration, ensuring a high level of removals for total suspended solids (TSS), phosphorus, nutrients, metals, trash, and hydrocarbons. The Kraken is a membrane filter, which provides high flow rates, while operating at a low loading rate to ensure maximum performance, minimum maintenance, and far less clogging.
Washington DOE TAPE  |  NJCAT Verification & NJDEP Certification


  • No Granular Media to Replace
  • High Flow Rates & Maximum Surface Area
  • Loading Rate of 0.05 gallons per minute (gpm)/sq.ft., for Minimal Maintenance
  • Membrane Filters can be Easily Removed & Cleaned by Hand
  • Built-in Pretreatment Chamber Captures Trash, Sediments, Debris and Hydrocarbons
  • Filters Dry out between Storm Events to Prevent Biofilm Growth which can Cause Clogging and Other Performance Issues

Learn More About the Kraken Filter

Our local stormwater experts come to you!

The Kraken® Filter’s low loading rate allows it to keep maintenance needs low and prevent clogging issues often found in other filter systems advertising high loading rates. Request a lunch & learn or project review session today, and get regionally-focused insight and solutions from local Bio Clean stormwater experts.


Washington State Department of Ecology

New Jersey Corporation for Advanced Technology (NJCAT)

New Jersey Department of Environmental Protection (NJDEP)

Atlanta Regional Commission

Maine Department of Environmental Protection

Pennsylvania Department of Environmental Protection


The Kraken Filter’s ability to accommodate high flow rates while requiring minimal maintenance,
makes it beneficial for a wide range of stormwater applications.

Kraken Configurations

We offer two Kraken Filter configurations: The standard model (square) and the round manhole configuration – Round Kraken.

Standard Kraken

Round Kraken

  • Surface area and pretreatment benefits
  • Maintenance benefits
  • Shallower excavation
  • Smaller lateral footprint
  • Other retrofit advantages
  • Optimal lead times

System Operation


Pretreatment captures trash, hydrocarbons, and sediments.

Membrane Filtration

Riser tubes create an upward flow path, so loading is evenly distributed over the vertical height of the filters.

Peak Capacity

After water passes through the filter and reaches the top of the membrane filters, flow through begins.


Bypass prevents scouring of sediments captured within the filtration chamber.


Removal of Total Suspended Solids (TSS) 89%
Removal of Trash 99%
Removal of Phosphorus (Expected - Varies with Particle size) 72%
Removal of Total Metal (Expected - Varies with particle size) 50%
Removal of Total Percentage Hydrocarbons (Expected) 90%

Maintenance & Installation

  • Lowest Life-cycle Cost of Any Media Filter
  • Fast and Simple Maintenance Procedures
  • Easily Cleaned with a Standard Vacuum Truck
  • Reusable Filter can be Cleaned with a Standard Garden Hose
  • Small Footprint Reduces Installation and Shipping Costs.
  • No Deep Sump Chamber as Found with Tentacle-type Systems. Reduces Excavation Costs.