Contech Engineered Solutions -Jellyfish® Filter Stormwater Treatment


The Jellyfish Filter is a stormwater quality treatment technology featuring high flow pretreatment and membrane filtration in a compact stand-alone system.

Category: filters | storm water management | stormwater filters...

MasterFormat: Facility Storm Drainage | Stormwater Utilities

Contech Engineered Solutions
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West Chester, OH 45069
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Jellyfish® Filter Stormwater Treatment

The Jellyfish Filter is a stormwater quality treatment technology featuring high flow pretreatment and membrane filtration in a compact stand-alone system. Jellyfish removes floatables, trash, oil, debris, TSS, fine silt-sized particles, and a high percentage of particulate-bound pollutants; including phosphorus, nitrogen, metals and hydrocarbons. The Jellyfish Filter has been tested in the field and laboratory, and is performance verified by the New Jersey Department of Environmental Protection, as well as numerous other stormwater regulatory agencies.

Setting New Standards in Stormwater Treatment

The Jellyfish Filter is a stormwater quality treatment technology featuring high surface area, high flow rate membrane filtration, at low driving head. By incorporating pretreatment with light-weight membrane filtration, the Jellyfish Filter removes a high level and a wide variety of stormwater pollutants. The high surface area membrane cartridges, combined with up flow hydraulics, frequent backwashing, and rinseable/reusable cartridges ensures long-lasting performance.

How the Jellyfish Filter Treats Stormwater
  • Stormwater enters the Jellyfish through the inlet pipe or inlet grate, builds driving head, and traps floating pollutants behind the maintenance access wall and below the cartridge deck.
  • Water is pushed down below the cartridge deck where a separation skirt around the cartridges directs oil, trash and debris outside the filtration zone, allowing sand-sized particles to settle in the sump.
  • Water is directed to the filtration zone and up through the top of the cartridge into the backwash pool. Once the water has filled the backwash pool, clean water overflows the weir and exits via the outlet pipe.
  • The membrane filters provide a very large surface area to effectively remove fine sand and silt-sized particles, and a high percentage of particulate-bound pollutants such as nitrogen, phosphorus, metals, and hydrocarbons while ensuring long-lasting treatment.
  • After every storm peak, the filtered water in the backwash pool flows back through the hi-flo membrane cartridges into the lower chamber. This passive backwash extends cartridge life, keeping the membrane clean for future events.
  • The draindown cartridge located outside the backwash pool enables water levels to balance.

Jellyfish Filter Features and Benefits


1. High surface area, high flow rate membrane filtration

2. High design treatment flow rate per cartridge (up to 80 gpm (5 L/s))

3. Low driving head (typically 18 inches or less (457 mm))

4. Lightweight cartridges with passive backflush

5. 3rd party verified field performance per TARP protocol


1. Long-lasting and effective stormwater treatment

2. Compact system with a small footprint, lower construction cost

3. Design Flexibility, lower construction cost

4. Easy maintenance and low life-cycle cost

5. Superior pollutant capture with confidence

Jellyfish Filter Approvals

The Jellyfish Filter is approved through numerous state and federal verification programs, including:

  • New Jersey Corporation for Advanced Technology (NJCAT) - Field Performance Verification per TARP Tier II Protocol
  • Washington State Department of Ecology (TAPE - CULD)
  • Maryland Department of the Environment (MD DOE)
  • Canada ISO 14034 Environmental Management - Environmental Technology Verification (ETV)
  • Texas Commission on Environmental Quality (TCEQ)
  • Virginia Department of Environmental Quality (VA DEQ)
Jellyfish Filter Configurations

The Jellyfish Filter can be can be configured in a variety of systems; manhole, catch basin, vault, fiberglass tank, or custom configuration. Typically, 18 inches (457 mm) of driving head is designed into the system. For low drop sites, the designed driving head can be less.

Jellyfish Filter Applications
  • Commercial and residential development, infill and redevelopment and stormwater quality retrofit applications
  • Highways, airports, seaports and military installations
  • Pretreatment for Low Impact Development, infiltration, and rainwater harvesting and reuse systems
Jellyfish Filter Maintenance
  • Jellyfish Filter cartridges are light weight, easy to use and reusable
  • Maintenance of the filter cartridges is performed by removing, rinsing and reusing the cartridge tentacles.
  • Vacuum extraction of captured pollutants in the sump is recommended at the same time.
  • Full cartridge replacement intervals differ by site due to varying pollutant loading and type, and maintenance frequency. Replacement is anticipated every 2-5 years.
  • Contech has created a network of Certified Maintenance Providers to provide maintenance on stormwater BMP’s.

See More


Jellyfish Filter Performance Testing Results
Pollutant of Concern% Removal

Total Trash


Total Suspended Solids (TSS)


Total Phosphorus (TP)


Total Nitrogen (TN)


Total Copper (TCu)


Total Zinc (TZn)


Turbidity (NTU)

< 15


TARP II Field Study - 2012 JF 4-2-1 Configuration

MRDC Floatables Testing - 2008 JF6-6-1 Configuration

Filtration for LID Designs

The Stormwater Management StormFilter, Jellyfish Filter, and MFS systems can be easily configured as decentralized, small scale inlets, including catch basin, curb inlet and manhole systems to meet LID treatment requirements. The systems provide high removal efficiency for primary pollutants of concern.

Filtration for Industrial Sites

Use the StormFilter and Jellyfish Filter systems to target fine solids, metals, oil, and grease from stormwater runoff at a variety of industrial sites. These systems can effectively reduce zinc and particulates from metal roofing, cooper and other metals leaching from condenser tubing, and paint from surface preparation and painting, to name just a few. Used in conjunction with an overall source control and treatment plan, these products provide the reliability and flexibility you need to help meet environmental permit requirements.

Filtration Systems for Water Quality

The Stormwater Management StormFilter, Jellyfish Filter, and MFS systems provide the highest level of treatment and meet the most stringent regulatory requirements. These low maintenance systems combine pretreatment and filtration, and are able to target site-specific pollutants to meet your water quality goals. Our field-proven products have earned hundreds of standalone BMP approvals from regulatory agencies nationwide.

Filtration for Removing Pollutants Prior to Discharge

Media filtration systems - like our StormFilter, Jellyfish Filter, and MFS systems are able to remove the most challenging pollutants from stormwater, including total phosphorus, soluble metals, oil, and very fine particles (down to 15 microns). Available in a variety of configurations (vault, manhole, catch basin, high flow and volume), these systems can be engineered to treat a wide range of flows within your drainage system and capture pollutants prior to discharge off-site.