1 post consumption water use the hidden waste thomas e. pape alliance for water efficiency presented...
TRANSCRIPT
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Post Consumption Water UseThe Hidden Waste
Thomas E. PapeThomas E. PapeAlliance for Water EfficiencyAlliance for Water Efficiency
Presented at:
Great Lakes Craft Brewers & Water Conservation Conference
October 26, 2009
Copyright 2009 – Thomas Pape
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Sustainability• Environmental impacts of the total life
cycle of products
• Product disposal often has the most severe long-term impact on the environment
• “Green” consciousness accepts responsibility for the entire lifecycle impacts
Copyright 2009 – Thomas Pape
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Water In the Beer Cycle
BREWINGMain Ingredient
SanitationCooling
AGRICULTUREIrrigation
DISPOSALUrinalsToilets
““You can never buy beer, you just rent it”You can never buy beer, you just rent it” – – Archie BunkerArchie Bunker
Copyright 2009 – Thomas Pape
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Water Efficiency in Brewing• Measured in pints of water used to
produce pints of beer.• Best water saving brewery strategies
achieve water use ratios of less than 4 pints of water to produce 1 pint of beer. 4:1
• Theoretical perfection of 1:1 (not feasible) • Additional brewing efficiencies likely
allows for less than 2 pints additional potential savings for each pint of beer produced.
Copyright 2009 – Thomas Pape
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The Hidden Water Waste• Current disposal practices use an average
of more than 19 pints of water for every 1 pint of beer – 19:1 efficiency ratio
• Worst case scenarios use 40 pints of water to dispose of 1 pint of beer – 40:1
• More than More than 10 gallons10 gallons of water of water savings are savings are easilyeasily available in available in disposing of every 1 gallon of beer disposing of every 1 gallon of beer served.served.
Copyright 2009 – Thomas Pape
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Water Efficiency in Beer Disposal
• The water saving potential is more than The water saving potential is more than 20 times greater in disposal cycle 20 times greater in disposal cycle compared to brewing cyclecompared to brewing cycle
Copyright 2009 – Thomas Pape
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The Technology
• High Efficiency Urinals (HEU)
• One pint per flush urinal provide 1:1 efficiency
• Beware: Sensor flush valves INCREASE water use!
Copyright 2009 – Thomas Pape
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The Technology
• High Efficiency Toilet (HET)• 1.28 GPF = 10:1 efficiency• Available in gravity flush, flush-
o-meter valve, and pressure-assist technology
• Beware: Sensor flush valves INCREASE water use!
Copyright 2009 – Thomas Pape
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The Technology
• Dual-Flush Toilet
• 0.9 Gallon/flush for liquid waste– 1.6 GPF for solid
waste
• 7.2:1 Efficiency If used properly
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The Technology
• Non-water urinals
• 0:1 Efficiency
• Vandal resistance
• Performance varies by make & model
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Future Technology?
• Pee-and-go
• She-inal
• Urine diverting toilets
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Green Codes Coming Soon• Applicable Green Code Provisions
– Require high efficiency urinals and toilets– Require 1 FU upstream of of non-water urinals– Requires sub-metering (major uses & spaces)– Cooling Tower efficiency standards– Require low-flow wash basin faucets– PRSVs, connectionless steamers in kitchens– Rain water harvesting– Allows alternative water sources: stormwater,
condensate, graywater, reuse, recycle, etc.
• What are your code change needs?
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The EconomicsEstimated urinal usage:
– Beerjoint = 200flushes/day = 72,000/yr– Brewpub = 100flushes/day = 36,000/yr– Bar & grill = 75flushes/day = 27,000/yr– Grill & bar = 50flushes/day = 18,000/yr
• Estimated women toilet usage– Beerjoint = 100flushes/day = 36,000/yr– Brewpub = 75flushes/day = 27,000/yr– Bar & grill = 50flushes/day = 18,000/yr– Grill & bar = 50flushes/day = 18,000/yr
Copyright 2009 – Thomas Pape
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Urinal Economics
• Water savings of 100flush/day/fixture– Replacing a 1 GPF urinal with 1 pint urinal
saves 31,500 gallons per year– $300 investment saves 630,000 gallons over
fixture lifespan– $0.000476 cost per gallon saved
• Water demand = water supply
Copyright 2009 – Thomas Pape
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Toilet Economics
• Water savings of 75flush/day/fixture– Replacing a 3.5 GPF toilet with dual flush
toilet saves 70,200 gallons per year– $300 investment saves 1,404,000 gallons
over fixture lifespan– $0.000213 cost per gallon saved
• Water demand = water supply
Copyright 2009 – Thomas Pape
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Implementation• Retrofit Own Brewpubs
• Gather Stakeholders– Brewers, Water Suppliers, Wastewater
Service Providers, Retailers, etc/
• Share Costs Based on Benefits
• Provide Incentives for Retrofits– Rebates, Vouchers, Direct Installations
• Exchange water savings for water rights
• Join the Alliance for Water Efficiency
Copyright 2009 – Thomas Pape
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Alliance for Water Efficiencya4we.org
Thomas PapeTechnical Advisor
Alliance for Water [email protected]
Copyright 2009 – Thomas Pape