Wastewater Lagoon Treatment & Water Resource Recovery
- Proven technology for lagoon treatment and tertiary polishing
- Year-round biological removal of contaminants
- Potential revenue opportunity from harvested biomass
- Active and passive systems or a combination of both
- Non-disruptive installation, nominal maintenance and low operator input
- Specialized plants that target specific pollutants
Treating wastewater with BioHaven Floating Island lagoon treatment systems can mean huge savings for the small community whose lagoons are not meeting discharge standards and are faced with an upgrade. Large treatment facilities can utilize BioHavens to polish their tertiary effluent and even harvest marketable products. Retrofitting with BioHavens is straightforward, non-disruptive and scalable.
- BioHavens are enhanced for long life in a wastewater setting. Non-corrosive fixtures, tethering to external bollards and environmentally-safe coatings protect the system components.
- Passive BioHavens planted with bushy-rooting perennials, maximize surface area and existing circulation patterns. Islands can be effectively deployed where power savings are desired. Specially-designed curtains can be installed to prevent short-circuiting.
- BioHaven Forced-Flow StreamBeds, which use an efficient airlift blower, are ideal for cold-weather treatment where they are effective under ice and are designed to limit temperature loss.
- Access walkways can be installed for plant maintenance on large systems to reduce O & M costs and facilitate harvesting.
- BioHaven technology is an ideal platform for Water Resource Recovery (WRR), capitalizing on the ability of nutrients to grow into biomass that can be harvested and utilized beneficially.
- Expected lifespan is 20 – 30 years.
Water Resource Recovery
The future of Water Resource Recovery (WRR) is viewing the contaminants in wastewater as resources to be recovered rather than problems to be eliminated. In larger Water Resource Recovery Facilities (WRRFs), the end-products are typically various types of water re-use, phosphorus recovery and re-use (among other goals).
BioHavens have a part to play in resource recovery, through growth and harvest of potentially beneficial plants or fish, that may have commercial or other value. Examples of this are:
- Hyper-accumulator plants that take up selenium can be harvested and ground up to be added to selenium-poor soil or feedstock.
- Minnows can be propagated using the biofilm, protozoa and macroinvertebrates present in BioHavens as food, then harvested and sold as bait fish.
- Landscape trees and shrubs can be grown to a certain size using fertilizers (phosphorus) present in the water and harvested for re-use.
- Resource Recovery Facilities can be used to grow breed stock for valuable native species, such as the eels harvested and released from a facility in New Zealand.
The positive footprint associated with using phosphorus in situ, plus the potential of the actual harvest to offset initial installation costs, assures a role for BioHavens in the forward-thinking Water Resource Recovery environment.
The BioHaven Solution
Description of Technology
BioHavens are a type of fixed-film treatment that employs bio-reactive processes in combination with plant remediation. The matrix provides an effective treatment surface as water is circulated through the fine mesh and begins to grow biofilm. Over time, as plant roots grow unimpeded through the permeable matrix, a massive surface area is created to accommodate the bacteria that consume organic matter and nutrients in wastewater. The exchange of sugars and enzymes between plants and microbes increases both microbial activity and plant growth to provide an unsurpassed water-cleaning approach.
Specific challenges, such as sulfate removal, can be effectively targeted with hyper-accumulator plants.
The Forced-Flow StreamBed uses a high-capacity airlift blower to direct flow into submerged matrix to maximize the circulation (and retention) of warmer water through the matrix and to enable it to simulate a bioreactor.
BioHavens up-cycle nutrients into biomass (plant or animal life) and harvesting is a simple process. For enterprising communities, cash crops can be grown, such as bait minnows and red-osier dogwood for landscaping. Larger Water Resource Recovery Facilities (WRRFs) can sustain the growth of trees, which can be composted for methane production or used as nursery stock. Up-cycling phosphorus locally (i.e., recovering it from water) not only saves sensitive waters from algae blooms and taxa loss, but minimizes the footprint associated with mining and transporting phosphorus to grow such commodities elsewhere.
Since it can be retrofit to an existing asset, a BioHaven solution requires low capital investment compared to traditional mechanical systems. BioHaven solutions also have very low operating and maintenance costs.
BioHavens can easily be adapted to suit a wide range of situations.
- Fit into any existing lagoon or polishing pond
- Work within the energy limitations of the facility
- Operate in cold climate or extreme environmental conditions
- Be adjusted to manipulate specific treatment conditions
- Be installed in stages to meet changing treatment requirements
We work directly with the client or with city engineers to design a tailored solution:
- Utilizing a proprietary BioHaven-specific modeling tool, system sizing is optimized
- Our engineers understand the resource recovery environment and remediation technologies
- Installation and service contracts available.
Case Studies and Research
Moonlight Basin – excellent Nitrogen removal from wastewater at altitude
Big Sky, Montana
This stunning array of BioHavens, installed and planted by Watershed Consulting, out-performed the customer’s expectation with exceptional Nitrogen removal.
CH2M Hill study measuring nutrient removal by BioHaven technology in waste water
This major study of the impact of 20 BioHaven floating islands demonstrated our highest removal rates so far on Nitrogen and Phosphorus, as well as documenting ancillary benefits of wildlife habit and mosquito abatement. The original research report is available on request from [email protected]
BioHaven Floating Islands technology enables this Louisiana wastewater facility to stay in compliance and win an EPA award in the process
Elayn Hunt Correctional Facility, St. Gabriel, Louisiana
This Louisiana DEQ-funded project achieved the best nutrient uptake recorded to date in the US using BioHaven floating islands. During a seventeen-month period of monthly sampling, COD, ammonia and phosphate were reduced to consistently manageable levels to keep the facility in compliance.
Marton Waste Water Treatment: First-of-its-kind floating island “Lid” eliminates odor, reduces BOD and cuts annual operating costs
Marton, New Zealand
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.
Achieving Significant Nutrient Removal in Aerated Wastewater Lagoons using floating island technology
Rehberg Ranch Residential Subdivision, Billings, Montana USA
This case study demonstrates the abilities of Floating Islands to significantly reduce nutrient levels in aerated wastewater. With a coverage area of 6.4%, the treatment lagoon in its first season achieved significantly greater removal rates, in particular of Ammonia (38%) and Total Phosphorus (27%),