BioHaven® Case Studies

Pasco County

Location: Pasco County, Florida, USA

Summary: Floating Treatment Wetlands removed substantial concentrations of nitrogen and phosphorus from reclaimed waters.  


Location: Reynoldsburg, Ohio, USA

Summary: Elevated BioSwale technology improve stormwater runoff by decreasing ammonia, nitrate, total phosphorus (TP), orthophosphate (Ortho-P), and E. coli bacteria. 

Moonlight Basin

Location: Big Sky, Montana, USA

Summary: This stunning array of BioHaven® Floating Treatment Wetlands (FTW’s), installed and planted by Watershed Consulting, out-performed the customer’s expectation with exceptional Nitrogen removal.

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Location: Mermaid Pool, Somerset County, New Jersey, USA

Summary: Biohaven® floating islands clean a waterway in New Jersey by significantly reducing total phosphorus (TP). The floating treatment wetlands (FTWs) were able to remove an estimated 66 pounds of TP in the course of one growing season, with maximum efficacy reached with TP concentrations over 0.1 mg/L.

Phosphorous Reduction

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Location: Elayn Hunt Correctional Facility, St. Gabriel, Louisiana, USA

Summary: Over a seventeen month sampling period, Biohaven® floating islands reduced COD, phosphate and ammonia to manageable levels that kept the facility in compliance with EPA guidelines. This Louisiana DEQ funded passive Biohaven® floating island launch has achieved the best nutrient removal rates to date.

Nutrient Removal with Passive Floating Treatment Wetlands Enables Louisiana Facility to Stay in Compliance and win EPA Award

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Location: Durham, North Carolina, USA

Summary: Biohaven® floating islands make good ponds better. This four year study tracked the reduction of nine aquatic parameters of concern in two North Carolinian storm water retention ponds.

North Carolina Stormwater BMP Study (Bill Hunt Study)

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Summary: Given proper installation and maintenance, floating treatment wetlands (BioHaven® Floating Islands) enhance aesthetic and water quality benefits of stormwater ponds. Size, location, root depth and plant choice can promote good removal of pollutants.  Plant uptake processes are only <2% of the overall nutrient load removal; rather, the roots provide additional resistance to flow (allowing sedimentation to occur).

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Location: North Valley School holding tank, Lodi, California, USA

Summary: Using a Biohaven Floating island in a waste water retention pond removal rates of over 95% were achieved in response to ammonia, Biochemical Oxygen Demand (BOD) and total suspended solids (TSS). The mass reduction in nutrients has led to a reduction in algae and results in cleaner water.

Nutrient Removal with Active BioHaven® Floating Treatment Wetlands

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Location: Lodi, California, USA

Summary: A waste water retention pond was outfitted with a Biohaven® Streambed resulting in conspicuous improvement in ascetics and odor. Nutrient removal rates for Total Nitrogen, ammonia, Biochemical Oxygen Demand (BOD) and total suspended solids (TSS) exceeded 78% with ammonia reduction up to 99%.

BioHaven FTW Streambed Treats Private Sewage Lagoon

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Location: Rehberg Ranch Residential Subdivision, Billings, Montana, USA

Summary: Active Biohaven® floating islands in waste water lagoons reduce nutrient levels and save money. With side by side comparisons of two waste water lagoons, man-made wetlands out perform traditional lagoons and create a more cost effective sewage treatment system.

Latest Generation Floating Treatment Wetland Technology- Achieving Significant Nutrient Removal In Aerated Wastewater Lagoons

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Location: McLean’s Pit Landfill, Town of Greymouth, South Island, New Zealand

Summary: Leachate, nutrient and pollutant rich water that escapes landfills, is a problem for surface and groundwater worldwide. The addition of passive Floating Treatment Wetlands to existing retention ponds is an effective and low cost strategy to remove harmful nutrients such as; Nitrogen, Total Suspended Solids (TSS) and reduce the Biochemical Oxygen Demand (BOD).

Demonstrating Treatment Of Landfill Leachate Using Floating Treatment Wetland Technology

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Location: Wiconisco Township,Pennsylvania, USA

Summary: Floating Islands are being used to meet state nutrient reduction goals for the Chesapeake Bay Tributary Strategy. The active Biohaven® floating islands provide superior removal rates for Nitrogen, Phosphorus and Total Suspended Solids (TSS) helping reduce algae blooms. The nutrient removal rates are significant given that islands only cover 2% of the water surface area.

Early-Stage Floating Treatment Wetland Technology To Achieve Nutrient Removal In Aerated Facultative Wastewater Treatment Lagoons

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Location:Rehberg Ranch Residential Subdivision, Billings, Montana USA and McLean’s Pit Landfill, Greymouth, New Zealand

Summary: When compared to traditional constructed treatment wetlands, Biohaven® floating wetland systems are able achieve higher nutrient removal rates with less land reclamation.

Floating Islands Outperform Constructed Wetlands

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Location: Outdoor Test Ponds, Shepherd, Montana, USA

Summary: Using outdoor test ponds as controlled environments, active man-made floating treatment wetlands were proven more effective in the removal of excess nutrients than standard retention ponds.

Proving the Concept- Field Test Of Floating Treatment Wetland Technology’s Ability To Treat Simulated Wastewater

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Location: Yingri Lake, Jinan, China

Summary: The addition of a passive Biohaven® floating island into an urban Chinese lake has mediated algae blooms while reducing nutrient levels and adding an ascetically pleasing addition to the water body.

Nutrient Removal And Algae Control Project in An Urban Lake In China

Wetlands to Mitigate Lake Eutrophication: Enhanced Circulation And Nutrient Uptake Expand

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Location: Research Lake near Shepherd, Montana, USA

Summary: Active circulation using a Levithan, with grid power, and Biohaven® floating treatment wetlands have resulted in higher dissolved oxygen (DO) levels for trout species in Fish Fry Lake.

Wetlands to Mitigate Lake Eutrophication- Enhanced Circulation And Nutrient Uptake Expand

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Location: Alden Laboratory, Holden, Massachusetts, USA

Summary: Floating islands were tested by hydraulic engineers for their wave dampening properties. The study found great potential for Biohaven® floating islands to be used to attenuate waves and protect erosion sensitive shorelines by reducing waves up to 93% with islands in series.

Wave Dampening Characteristics Tested In Both Deep Water And On The Shoreline

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Location: Shepherd, Montana, USA

Summary: The continued use of floating treatment wetlands (FTWs) in Fish Fry Lake has led to above average growth rates in the fish population while maintaining water clarity and ecosystem health due to reduced nutrient levels.

Fish Fry Lake - 2014 Update

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Location: Shepherd, Montana, USA

Summary: With Biohaven® floating islands providing substrate for optimum periphyton growth to serve as the base of a trophic food web, fish can be harvested as a means of removing phosphorus at a calculable rate from the water.

From Phosphorus to Fish - Stewarding Fish Fry Lake for Optimum Water Quality Enhancement

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Location: Floating Island Research Center, Shepherd, Montana, USA

Summary: A Biohaven® floating streambed with active circulation is used to promote raised dissolved oxygen levels while ‘brush park’ principles are being used to sustain periphyton for an aquaculture style fish pond for Fathead and Stickleback minnows.

Minnow Pond - Establishing Brush Park Aquaculture using BioHaven technology combined with wisdom from SE Asia

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Location: Dutchy Lake, Oregon & Sheepy Lake, California, USA

Summary: Man-made floating islands were used to help engender juvenile salmonids by reducing predation from Caspian terns. The addition of the new bird habitat has drawn the terns away from the salmonid nursery waters.

Floating Islands Provide Alternative Nesting Habitat For Caspian Terns

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Location: Elephant Butte, New Mexico, USA

Summary: The versatility Biohaven® floating islands make them ideal for providing habitat for bass by providing a submerged portable spawning platform, with some help from the Kids of Southwest Junior Bassmaster Club.

Floating Island Provides Bass Spawning Habitat

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Location: Oakland, California, USA

Summary: Rising sea levels are reducing habitat for the Clapper Rail, an endangered bird that nests in marshes. The deployment of retro fit floating islands have been successful in providing habitat and optional nesting sites in spite of rising water levels. The islands ability to raise and lower with water levels make them ideal for ever changing tidal conditions.

Floating Island Habitat Gives Endangered Bird (Clapper Rail) Hope For Survival

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Location: Elfin Cove, SE Alaska, USA

Summary: The findings show that Biohaven® floating islands not only survive harsh environments but can thrive. After a winter deployed in the harsh marine environment, the island’s perennial vegetation bloomed in spring and the man-made islands were colonized by numerous marine animals and plants.

A BioHaven Floating Island Is Tested In A Harsh Marine Environment Off The Coast Of SE Alaska

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Location: Metra Park, Billings, Montana USA

Summary: This two-year study documents the success of an FTW installation in treating light industrial stormwater runoff.

Industrial Stormwater Pond

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Location: Marton, New Zealand 

Summary: In this innovative application of a BioHaven® floating island from New Zealand, a blanket or lid is built to cover and treat a pond anaerobically, thereby reducing troublesome odors which had until then plagued the residents of Marton. This treatment option was highly successful in improving the effluent, and saved the city approximately $150,000 in annual operating costs.

marton new zealand

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Location: Shepherd, Montana and Virginia, USA 

Summary: BioHaven® matrix has been successfully deployed in the treatment of runoff inside streams and ditches prior to it entering a lake or river.  By form-fitting the swale to the stream channel, circulation is assured, short-circuiting is eliminated and treatment capacity is optimized.