wwt consulting introduction to biohaven
TRANSCRIPT
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[email protected] 01234 752979 www.therrc.co.uk
River Restoration: Delivering Multiple Benefits
15TH ANNUAL NETWORK CONFERENCE
The RRC would like to thank the sponsors of the RRC Annual Conference 2014 who support discounted places
#RRC2014
Floating Treatment Wetlands Delivering Ecosystem Services
Leela O’Dea Co-founder frog environmental
BioHaven
• Introduction
• The value of wetlands for ecosystem services
• How does a BioHaven work?
• Applications
• System design & performance
• Case Studies
BioHaven Floating Treatment Wetlands
• Very stable and durable growing platform
• Long design life allows return of investment
• Integrated internal buoyancy
• Proven in field over a decade worth of data, research and development
• Hugely versatile & low maintenance
BioHaven; a new approach to floating wetlands
• Removes nutrients
What does it do? How does it work
Introduction to BioHaven®
Cross section of BioHaven
What is the economic value of wetlands globally?
$ 14.9 Trillion Constanza et al (1997)
Ecosystem Services
Process Function Services & Benefits
Aerobic denitrification & ANAMMOX
Reduced C and NH4 Improved water quality & clarity Waste breakdown Reduced occurrence of BGA & algal blooms Improved human & animal health Reduced cost of water treatment Carbon/Climate regulation Resilience to climate change Biological diversity Pollination Habitat provision & connectivity Wild fish harvesting Science & education Tourism & recreation Meaningful places
Anaerobic nitrification & nitritation
Reduced C, N, NH4 & pH
Microbial oxidation Reduced C
Physically aiding sediment deposition, peat accretion & soil adsorption
Reduced C, P, TSS & heavy metals
Nutrient & energy flow within the food web
Reduced P, N and heavy metals
Shading Reduced evaporation, stabilises temperature
Erosion Control Reduced TSS. Increased habitat
Planting media Increased habitat
• Biodiversity offsetting & habitat creation
• Erosion protection- changing the bank profile
• Reducing impact of agricultural and urban run off
• Waste water treatment – secondary and tertiary
• Pre-treatment of water prior to abstraction
• Management of SuDS water quality
• Urban beautification
• Aquaculture & horticulture
• Integrated landscape solutions
Delivering Ecosystem Services
Does BioHaven actually deliver?
Ecosystem Services – Water Quality
• Improved water quality & clarity
• Waste breakdown
• Reduced occurrence of BGA & algal blooms
• Improved human & animal health
• Reduced cost of water treatment
Performance Data
BioHaven in SuDS systems
SuDS case study: Durham, NC
Parameter July 2009 before BioHaven
July 2010 after BioHaven
TSS 89% 94%
Nitrate 50% 65%
Total N 58% 88%
Total P 58% 87%
Pond receiving SuDS water
Parameter July 2009 before BioHaven
July 2010 After BioHaven
Reduction
COD (mg/l) 63 30 52%
BOD (mg/l) 20 11 45%
Total N 11 3.9 65%
Total P 0.93 0.1 89%
DO mg/l 12.1 6 50%
Jingri Lake, Jinan, China Urban lake suffering algal blooms
Wastewater Treatment
Comparing a Constructed Wetland
Parameter BioHaven floating wetland % removed
Constructed wetland % removed
BOD 89% 81%
TSS 69% 39%
Ammonium 83% 21%
Total N 53% 68%
Size m2 214 1197
Ecosystem Services – Climate Change
• Carbon/Climate regulation
• Resilience to climate change
Climate Resilience
Ecosystem Services – Biodiversity
• Biological diversity
• Pollination
• Habitat provision & connectivity
Habitat creation
Living Shorelines & Erosion Control
Sheppy Lake: Caspian Tern raft
… a weight equivalent to 75 elephants
… better suited to terns
Ecosystem Services – People
• Wild fish harvesting
• Science & education
• Tourism & recreation
• Meaningful places
Recreation
Berkshire: Landscaping
Urban beautification
Aquaculture and horticulture
BioHaven summary
• No land take required
• Zero chemical and zero energy in operation
• Proven in the field to be extremely robust
• Highly versatile – ideal for retro fitting
• Rapid and easy deployment
• Provide services at fluctuating water levels
• Small footprint required for water treatment
• Long design life
3 takeaway points from this talk
• Floating wetlands can play a role throughout a catchment to help achieve WFD driven targets providing many ecosystem services.
• BioHaven makes Floating Treatment Wetlands an economically viable solution.
• Floating wetlands can be installed in areas where natural wetlands can’t establish.
Leela O’Dea [email protected]
20
[email protected] 01234 752979 www.therrc.co.uk
River Restoration: Delivering Multiple Benefits
15TH ANNUAL NETWORK CONFERENCE
The RRC would like to thank the sponsors of the RRC Annual Conference 2014 who support discounted places
#RRC2014