urban water transformation - neweaneighborhood 1 2 ww reclamation (mgd) 2 3 water for hydrologic...
TRANSCRIPT
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UrbanWaterTransformation:DesigningInfrastructureforaLivableFuture
NEWEA2017AnnualConference&ExhibitJanuary24,2017
JulieWoodCharlesRiverWatershedAssociation
BruceDouglasNaturalSystemsUtilities
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BACKGROUND
WhyisCRWAtalkingaboutwastewatertreatment?Howcanweimproveourexistinginfrastructureandprepareitforthefuture?
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MWRASystem
WaterflowsfromQuabbin andWachusett Reservoirsto48communitiesinthegreaterBostonarea
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StreamflowLosttoWastewaterSystem
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Source:WhenItRains,ItPours.EnvironmentAmericaResearchandPolicyCenter,December2007
ClimateChangewillbringtheNortheasternUnitedStatesMoreLargeStormsandFloods
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INITIATIONPHASESelectingpilotneighborhoodsanddevelopingconceptualCWERCdesign
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PilotNeighborhoodSelectionandAssessment
PilotNeighborhood#1:ExpandedInnovationDistrict
PilotNeighborhood#2:LowerStonyBrook
CriticalSitingElements: AccesstoadequatesewagevolumeAvailablespaceOpportunitiesforreuseoftreatedwater
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PilotNeighborhoodSelectionandAssessment
PilotNeighborhood#1:ExpandedInnovationDistrict
PilotNeighborhood#2:LowerStonyBrook
CriticalSitingElements: AccesstoadequatesewagevolumeAvailablespaceOpportunitiesforreuseoftreatedwater
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MaximizingWaterandEnergyResourcesResourcetoWastetoResource
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CommunityWaterandEnergyResourceCenter=CWERC
• Treatandresellaportionofthewater(MBR)
• Captureanduse/sellthermalenergy(heatpump/exchange)
• Produceanduse/sellbiogasthroughco-digestion(CHP)
• Capturenutrients(N)forresale
• Producecompostforresale(2tiers,separatingsludgeandSSOstreams)
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MODELINGNeighborhoodscale
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URBANSMARTSEWERING MODELSUBMODULES
FrontEndGeographicalVariables
SewerWater/Organic
WasteCharacteristics
TechnicalConstantsandGeographicalVariables
CalculationModule
CAPEXandOPEX
UrbanSmartSeweringObjectives
ProductsandRevenues
FinancialModelResults
BackEndGeographicalVariables
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CWERCModeling:InputsandAssumptionsNeighborhood 1 2
WWReclamation(MGD) 2 3
WaterforHydrologicRestoration(MGD)(%total)
0.5(25%)
1(33%)
FoodWasteProcessing(Tons/Day)
80 54
FoodWasteTippingFee($/Ton) 80 60
ElectricRatebasedonenergyproductionvs.parasiticload
$0.12/kWh $0.15/kWh
WastewaterTreatmentFee(%BostonRetailTreatmentFee)
0 0– 31%
WaterReuseFee(%BostonPotableWaterRetailFee)
30% 50– 100%
ApproximateFacilityFootprint 2acres 2.5acres
OtherAssumptions:• WWcontentbasedon
influentatDIWWTP• Reusewaterbuyeris
onsiteornearby• Thermalenergysoldat
$9.77/MMBTU• Foodwasteproducer
locationandavailabilitybasedonMassDEPestimates(nooverlapb/tneighborhood#1and#2suppliers)
• Nodischargetosewer• SSO20%solidsas
received
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CommunityWaterandEnergyResourceCenterCapitalCostandRevenueSummary(CWERC1)
• Totalcapitalcost:$47million– headworks,MBR,storagetank,heat
pump,anaerobicdigestor formunicipalsludge,foodwastedigestor,dewaterbiosolids,dewateringfoodsolids,foodreceivingstation,digesterstoragetanks(2,100Kgallontanks)digesterpumps,CHPunit,nutrientrecovery,composting
– doesnotreflectprevailingwagerequirements
• AnnualO&Mcosts:$4.9M– wastewatertreatment,pumping,
energy,chemicals,labor,misc.supplies
– doesnottakeintoaccountthevalueofanyenergyproducedonsite.
• Annualproductfees/revenues:$7.4M
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Neighborhood1CWERCOutput
$1,201,036
$2,494,000
$665,700
$19,200$151,800
$59,600
$2,336,000
$439,400
AnnualIncomebyRecoveredResource
ReuseWaterSales
ThermalEnergyCapture
BiogasConditioningandCHP
SludgeDigesterCompost
FoodwasteDigesterCompost
NitrogenRecovery
FoodWasteTippingFees
RenewableEnergyCredits
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INTEGRATINGSTORMWATERMANAGEMENT
Marryingpotable,storm-,waste-,surfaceandgroundwatermanagementtorestorethenaturalwatercycle
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NeighborhoodAssessment
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NeighborhoodAssessment
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StreamRestorationorCreation
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StreamDaylighting-Visualization
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GreenInfrastructureforFloodControlandFun
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NON-MARKET(SOCIALWELFARE)ECONOMICANALYSIS
Manybenefitsexistoutsidetraditional“markets”
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WelfareBenefits:Neighborhood2DistrictPlan
BENEFITCATEGORYVALUE
LOWER UPPER
AnnualBenefitsRelatedtoNeighborhood2CWERC
NewEnergySources $1,220,170 $1,348,825
CarbonEmission Reductions $120,385 $614,968
CriteriaEmission(NOx,SOx) Reductions $42,513 $105,994
AvoidedUnderpinning(GCOD) $8,600,000 $22,900,000
TOTALCWERC2BENEFITS $9,983,068 $24,969,787
AnnualBenefitsRelatedtoGI
EnergyReductions $123,232 $246,464
CarbonEmission Reductions $9,480 $46,335
CriteriaEmission(NOx,SOx) Reductions $13,396 $33,399
CarbonSequestration $3,991 $20,679
AirQualityImprovements $6,755 $16,889
AvoidedGreyInfrastructure $10,075,174 $20,150,346StreamDaylighting $139,442 $1,426,351
ADDITIVEGIBENEFITS $10,371,470 $21,940,463PropertyValue(StreetGreening) $1,522,778 $3,045,556
WetlandServices(Large Wetlands) $96,422 $894,514
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EXPANSIONANDREPLICATION
ReplacingacentralizedsystemwithadistributednetworkofCWERCsandextensivegreeninfrastructureimplementation
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CWERCExpansionModel
• Methodology– Developed“unitmultipliers”basedonpilotscaleplants(i.e.energyproduced/gallonwwtreated,etc.)
– Modelingdoneonmunicipalscale
– Developedmultiplescenariosforvaryingconditions
– Capitalrecoveryfactor:25yearlifespan,interestrates3-5%
ScenarioA:MaxStorage
Storage=5xdailyflow,waterresale 57%ofcurrentrate($3.80/1000gallons),wastewaterfee=$0
ScenarioB:LowRatesw/fees
Storage= 3xdailyflow,waterresale60%currentrate($4.00/1000gallons),wastewaterfee37%currentrate($2.21/1000gallons)
ScenarioC:ThermalCreditsinAPS
Addedthermalalternativeenergycredits,storage= 3xdailyflow,waterresale 60%currentrate,wastewaterfee37%currentrate
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ModelingResultsSummaryScenario A B C
Totalcapitalcost $6,678,992,512 $6,061,272,512 $6,061,272,512
Netannualizedcost(5%) $(394,680,023) $(85,897,238) $(32,529,246)
Netannualizedcost(4%) $(347,927,075) $(43,468,330) $9,899,662
Netannualizedcost(3%) $(301,174,127) $(1,039,422) $52,328,570
PotentialavoidedcostsforO&Mandcapitalupgradesforcentralizedsystem:$118-200millionannually
Additionalwelfarebenefitoflargescaleimplementation:$308-623million(CWERCsonly)and$555-960million(CWERCsandGI)
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QUESTIONSANDCOMMENTS?
Thankyouforyourtime!
Specialthankstoourotherco-authors:NigelPickering,(formerly)CRWA,BobZimmerman,CRWA;BarbaraWingler,(formerly)NSU;RobertBlack,IndustrialEconomics,Inc.;andChrisSmith,IndustrialEconomics,Inc.
JulieWood BruceDouglas,P.E.DirectorofProjects VicePresidentCharlesRiverWatershedAssociation NaturalSystemsUtilities781-788-0007x225 [email protected] [email protected]