green opportunities for wastewater planning on …...cape cod regional wastewater management...
TRANSCRIPT
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Green Opportunities for Wastewater Green Opportunities for Wastewater
Planning on Cape CodPlanning on Cape Cod
Green First Workshop
December 8, 2011
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Cape Cod Regional Wastewater Cape Cod Regional Wastewater
Management Planning (RWMP)Management Planning (RWMP)
Objective: Restore degraded water bodies through regional nutrient management policy promoting appropriate infrastructure and growth management mechanisms while protecting taxpayers from unnecessary costs.
GoalPolicy Integrating:
•Environment •Affordability •Infrastructure •Growth Management
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106106 WatershedsWatersheds
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5757 EmbaymentsEmbayments
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Watersheds to Coastal Embayments Watersheds to Coastal Embayments and Town Boundariesand Town Boundaries
AA Regional Regional IssueIssue
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YearYear--roundround
Population:Population: 215,888215,888
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SummerSummer
Population:Population: 500,000500,000
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Existing treatment facilities
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The traditionalThe traditional
engineering engineering
approachapproach……
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Sewer all developmentSewer all development
$8 Billion$8 BillionMiles of Piped impervious surfaceMiles of Piped impervious surface
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A More SustainableA More Sustainable
approachapproach……
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Smart GrowthSmart Growth
“…“… guide growth toward areas that are guide growth toward areas that are
adequately supported by infrastructure adequately supported by infrastructure
and away from areas that must be and away from areas that must be
protected for ecological, historical, or protected for ecological, historical, or
other reasons.other reasons.””
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No No ““silver bulletsilver bullet””
to fit multiple to fit multiple
needs:needs: Traditional Gray Infrastructure
Sustainable Green Infrastructure
AND
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Sustainability PlanningSustainability Planning
Triple-bottom-line approach considering:
People Planet Profitability:
Restoring hydrologic balance to sustain:Quality of Life…Connectivity…Land Use Balance…
Air, Land and Water Quality…Economic Development
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Not one big pipe:Not one big pipe:
Mix of GrayMix of Gray InfrastructureInfrastructure
TITLE 5 / IATITLE 5 / IA CLUSTERCLUSTER SATELLITESATELLITE CENTRALIZEDCENTRALIZED
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PLUS PLUS
Mix of GreenMix of Green InfrastructureInfrastructure
• Fertilizer Reduction• Landscape Design with
Nitrogen-Fixing Plants• Wetland Restoration/Culvert
Widening• Constructed Wetlands• Stormwater Retrofits• Aquaculture Farms• Reactive Barrier Systems• Living Machines• Bio domes
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A Closer Look at A Closer Look at
Innovative Innovative
TechnologiesTechnologies
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Living MachinesLiving Machines
• Computer controlled drain and fill cycles, simulating tides
• Treats blackwater sewage by way of a diverse microbial system, or biofilm, that grows on the surface of a special gravel medium contained in a series of watertight basins
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Constructed WetlandsConstructed Wetlands
• Subsurface flow
• Will remove BOD, Nitrates, Metals-ionic and solid form, Petroleum Hydrocarbons
• Removal of 40-80% of the total nitrogen in wastewater
• The rate of removal is a function of retention time
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Restoring Hydrology through Restoring Hydrology through
““Greened AcresGreened Acres””
• Attenuates nitrogen distributed in the atmosphere
• Green Roofs, green walls
• Tree Planting
• Infiltration Strips: Green Streets