Fish Protection Systems (FPS)
In an effort to reduce the mortality of water life, Beaudrey has developed various water-life recovery systems that can be installed on our intake screens. Beaudrey systems are designed to protect all types of swimming creatures, even those with little or no swimming ability such as crustaceans, larvae and juveniles. Beaudrey fish friendly screens are designed to meet a few fundamental guidelines:
- Marine life must not be exposed to air or subject to skin injury
- Water life must not be subjected to shocks against hard surfaces
- Water must fill at least 70% of the trough’s depth so that fish do not fall from a height greater than 500 mm
- Water life must not be subjected to brutal water pressure decreases nor to negative relative water pressure
With intake screens and filters that meet these expectations, Beaudrey equipment can help power plants become compliant with the Environmental Protection Agency’s (EPA) Clean Water Act 316 (b) regulations for cooling intake structures.
Bio-Flush™ Trash Rakes
The Beaudrey Bio-Flush™ fish collection system is designed to have minimal impact on water life that is drawn into the water intake system. Bio-Flush™ is typically installed on Beaudrey’s automatic trash rakes or bar screens. Its purpose is to help fish that are trapped on the bar screen or trash rake return to the open water without harm or extended exposure to the air.
Beaudrey trash rakes equipped with Bio-Flush™ are specially shaped so that they lift the fish from the bar screen and move them to a water bucket where they are kept as the trash collector travels upwards. Once it reaches deck level, the trash rake tilts and the fish fall with the flush water into a deck flume where a sufficient amount of circulating water is maintained to cushion their fall. In order to reduce the height of the fall, the trash rake head tips gently forward while the bucket is flushed. The flume is then emptied and the fish are returned to their natural environment.
Scoop-a-Fish™ for Band Screens, Drum Screens and Water Intake Protection (WIP) Screens
First patented in 1979, the Scoop-a-Fish™ has proven to be one of the most effective fish protection systems developed by Beaudrey. The Scoop-a-Fish™ system is designed to be used on the Water Intake Fish Protection (WIP) Screen, on Beaudrey traveling band screens and on drum screens.
The Scoop-a-Fish™ system is a unique fish saving technology because it is able to divert marine life from the intake screens while it is still underwater. To achieve this, Beaudrey’s Scoop-a-Fish™ system uses a fish friendly pump to create a gentle current that pushes the fish into a suction scoop. Then, the fish are channeled around the rotating screen without ever leaving the water. The fish are never exposed to the surface air nor are they subjected to drastic water pressure differentials.
Beaudrey is so confident in the Scoop-a-Fish™ system that in 2008 the company commissioned a survival study and impingement characterization using the Beaudrey Water Intake Protection (WIP) screen installed with Scoop-a-Fish™technology. The study was conducted at the North Omaha Power Station, U.S.A; located on the Missouri river and was performed in conjunction with the Alden Laboratory research group. The main purpose of the study was to assess the effect of the Beaudrey WIP on the mortality rate of fish that may be impinged or entrained on the screen. During this rigorous three year study, fish survival was monitored by independent research company, EA Engineering, Science and Technology, Inc.
Post-collection survival was consistently at or above the performance standard of the U.S. Environmental Protection Agency’s (EPA) Clean Water Act 316(b) Phase II Rule (2004) of 80-95% reduction in impingement mortality for all species tested. The results of this study show that the survival rate of fish that pass through the Scoop‐a‐Fish™ system is equal to that of river swimming fish. The Scoop-a-Fish™ system and the WIP have proven their reliability and effectiveness in protecting marine life and can help plants to achieve EPA 316(b) requirements set forth for cooling water intake structures.
Beaudrey’s NoCling™ anti-fiber screening panels are the best solution to preventing residual, fibrous build-up, jellyfish impingement and surface trauma to fish. Fabricated in specially formulated composite material, these panels are designed to be durable and effective in water with high fibrous content while being non-abrasive to marine life that comes in contact with them. The NoCling™ panel offers a perfectly smooth, flat surface with no bumps or sharp edges for fish to be pushed against. It eliminates damage to fish skin and surface trauma. These panels can be manufactured with various mesh sizes to suit the unique conditions specific to each project.