BioDocks Presentation 2010-10-20
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"BioDocks -- Mimicking Natures Methods for Flotation, Nutrient Uptake, Wave Absorption, Fisheries Enhancement and Natural Aesthetics in Marinas". Presentation at the Docks & Marinas 2010 36th National Course and Conference, Madison, Wisconsin USA, October 18-20, 2010
![[object Object],[object Object],Launching the BioDock from the Success of the BioHaven BioHaven Walkway](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
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BioDocks Presentation 2010-10-20
- 1. BIODOCKS MIMICKING NATURES METHODS FOR FLOTATION, NUTRIENT UPTAKE, WAVE ABSORPTION, FISHERIES ENHANCEMENT AND NATURAL AESTHETICS IN MARINAS 36 th National Course and Conference Docks and Marinas 2010 October 18-20, 2010 Madison, Wisconsin USA Presented by: Dave Wentland, P.E. Coastal Engineer www.docks-marinas.com
- 3. Floating Treatment Wetlands are the newest advance in the established field of constructed wetlands. The BioHaven ® Floating Treatment Wetland is the “most innovative” constructed wetland technology developed to date. New Zealand Institute of Water and Atmospheric Research
- 6. Urban : sewage treatment, storm water, drinking water reservoirs, polluted rivers and streams, erosion control Agri- and aqua-culture: treating effluent water Mines: cleansing water, settling out heavy metals Wetland restoration, mitigation and banking Climate change adaptation : habitat, wave dampening Lake restoration, dead zone mediation Docks and Marinas
- 8. Where does everything go? The Pathways : Gasification Bound up inside the islands Sloughing off into benthic layer Floating Supermarket effect
- 11. Buoys indicate diffusion aerators. Early data suggests a 40% reduction in TP and a high level of Methylisoborneol has been removed (toxin from blue-green algae).
- 16. Floating Dock in Elfin Cove, Alaska Here it extends outboard of the dock footprint as a bumper. It can be sized the exact footprint of the decking like most existing docks with no additional space required.
- 17. Floating Dock in Elfin Cove, Alaska Vegetation including vegetable or flower gardens can be added alongside the docks or in other areas of the marina Anchoring attachments such as pilings or chain, cable or flexible tethers can be connected to the dock frame for boat impact, wind, wave and current loadings.
- 20. WHY SOUTH BAY MARINA IN GREEN BAY, WISCONSIN IS A GOOD CANDIDATE FOR RESEARCH Next door to the Metropolitan Green Bay Wastewater Treatment Plant (MSD) Highly Nutrient Water Blue-green Algae in Late Summer
- 21. 1. Close by so can be easily monitored on-site by Dave Wentland, P.E., an environmental/coastal engineer and marina designer. 2. Located in a highly nutrient rich water at the mouth of the Fox River with extensive blue-green algae blooms in late summer. 3. Located in an urban area for good public and regulatory exposure. 4. Alongside the largest PCB dredging project ever undertaken in the US - good public exposure including EPA, USFWS and DNR. 5. Fully protected/armored marina except for the entrance so minimal external influences. 6. The marina owners are pursuing Wisconsin's "clean marina" initiative and want to become an official designated CLEAN MARINA. 7. CLEAN MARINA designation provides opportunities for lower insurance costs, higher-end environmentally conscious marina users, and good marketing and press. Studies have shown they are typically more profitable. WHY SOUTH BAY MARINA IN GREEN BAY, WISCONSIN IS A GOOD CANDIDATE FOR RESEARCH Marina Sized for 354 slips and being built out in phases -- 142 slips in 2010.
Editor's Notes
- The base of the natural floating island consists of a matrix of roots. Search for a man-made equivalent took Floating Island International to a matrix manufactured by Americo made of 100% recycled polyester, filtration material, certified non-toxic, coated with acrylic, UV-resistant (being tested at present).
- BioHavens provide surface area for microbes. Concentrated surface area microbes remove contaminants from water, such as the ones listed on the left (carbon, phosphorus, heavy metals (eg, copper and zinc), nitrates, ammonium. These microbial processes are well documented. Microbes “consume” nutrients which would otherwise produce algae. The more biofilm (microbes) the less algae. Biofilm forms, containing millions of microbes bonded together, reproducing like crazy (populations double within 2 – 3 hrs and sometimes 20 mins). They can’t reproduce without a surface area because they are single-cell organisms that reproduce by splitting in two. Microbes secrete sticky stuff which other stuff bonds to: algae, suspended solids in the water. This is without plants! Adding plants adds a whole new dimension. The roots provide even more surface area for microbes, especially when you take into account the roots hairs. The plants themselves take up nutrients, but only 15 – 20% of the total. Microbes do 80 – 85% of the work.
- BioHavens provide surface area for microbes. Concentrated surface area microbes remove contaminants from water, such as the ones listed on the left (carbon, phosphorus, heavy metals (eg, copper and zinc), nitrates, ammonium. These microbial processes are well documented. Microbes “consume” nutrients which would otherwise produce algae. The more biofilm (microbes) the less algae. Biofilm forms, containing millions of microbes bonded together, reproducing like crazy (populations double within 2 – 3 hrs and sometimes 20 mins). They can’t reproduce without a surface area because they are single-cell organisms that reproduce by splitting in two. Microbes secrete sticky stuff which other stuff bonds to: algae, suspended solids in the water. This is without plants! Adding plants adds a whole new dimension. The roots provide even more surface area for microbes, especially when you take into account the roots hairs. The plants themselves take up nutrients, but only 15 – 20% of the total. Microbes do 80 – 85% of the work.
- This is the data from the NIWA study, relating to storm water. They used 4 native NZ wetland plants, pre-vegetated with good root growth. These results are excellent and show great promise for biohavens in storm water ponds. See NIWA article on Floating Island International (floatingislandinternational.com) website for full description of the research.
- The matrix is sufficiently open to allow good circulation (this was tested in the R&C study). Intensified results = concentrated wetland effect.