Marine Life Exclusion System
Provides Affordable compliance under the Clean Water Act, Section 316(b). The Gunderboom MLES reduces the impact of intake structures on aquatic organisms by preventing entrainment and impingement, while protecting the structure from marine life intrusion. The MLES also reduces operating and maintenance costs and helps prevent plant shutdowns. Best Technology Available. Gunderboom’s MLES is a water-permeable barrier that keeps fish eggs, larvae and other aquatic organisms a safe distance away from an industrial intake structure. Engineered, manufactured and supported by Gunderboom, the MLES preventing both impingement and entrainment of ichthyoplankton and juvenile aquatic life.
How the MLES works.
Comprised of a pocket formed by two layers of treated fabric, the patented, full-water-depth MLES curtain is either suspended by flotation billets and anchored in place, or integrated into existing shoreline intake structures. Sealed against the sea floor and shoreline structures, the MLES completely surrounds the intake structure, preventing targeted planktonic and neustonic organisms from entering the system.
Since the surface area of the MLES is large compared to an intake screen, water velocity through the Gunderboom curtain is up to 98 percent less than the velocity near the intake structure. Low water velocity enables even small fish larvae to drift away from the boom.
Inner workings of the Air Burst system Air Burst cleaning system Automatic AirBurst cleaning system. Sediment and passively floating organisms drawn onto the fabric are freed when Gunderboom’s AirBurst cleaning system routinely releases high-pressure air at the boom’s base. Bursts of compressed air shake each fabric panel, releasing deposits and ensuring a steady flow of water through the curtain.
Minimal impact on aquatic life. Data from worst-case test conditions shows that contact with an operating MLES does not adversely affect fish eggs or larvae.
Fossil fuel conservation. Daily operation of dry cooling towers consumes large amounts of fossil fuels. A cost-effective, ecologically sound and aesthetically pleasing alternative, Gunderboom’s MLES enables plant operators to maintain water intake levels, even during periods of aquatic migration.
Filtering out harmful materials. Fish, debris, aquatic vegetation and passive marine organisms such as jellyfish cannot get inside the barrier to cause problems with the cooling water intake structure (CWIS) or condenser tubes.
Custom Designed and Engineered.
Gunderboom’s scientists and engineers work closely with clients to develop systems that meet project needs with maximum efficiency. Using a phased approach, the design process begins with a feasibility study. In new installation areas, Gunderboom’s Flow Test Apparatus (FTA) is deployed to test fabric treatments and designs under ambient conditions.
Since each MLES is designed for site specific application, adjustments are made to the standard design to account for:
- Target species and stages of aquatic life
- Facility water flow rates
- Physical factors, including bathymetry, bottom conditions, configuration of the water body and facility layout
- Water body characteristics, including elevation changes, currents, wind-induced wave action and suspended sediment concentrations
- Seasonality of the problem and duration of deployment
- Degree of automation.
The MLES can be designed so that specific organisms, particulates and contaminants are effectively filtered and controlled.