urban water transformation - neweaneighborhood 1 2 ww reclamation (mgd) 2 3 water for hydrologic...

UrbanWaterTransformation:DesigningInfrastructureforaLivableFuture

NEWEA2017AnnualConference&ExhibitJanuary24,2017

JulieWoodCharlesRiverWatershedAssociation

BruceDouglasNaturalSystemsUtilities

BACKGROUND

WhyisCRWAtalkingaboutwastewatertreatment?Howcanweimproveourexistinginfrastructureandprepareitforthefuture?

MWRASystem

WaterflowsfromQuabbin andWachusett Reservoirsto48communitiesinthegreaterBostonarea

StreamflowLosttoWastewaterSystem

Source:WhenItRains,ItPours.EnvironmentAmericaResearchandPolicyCenter,December2007

ClimateChangewillbringtheNortheasternUnitedStatesMoreLargeStormsandFloods

INITIATIONPHASESelectingpilotneighborhoodsanddevelopingconceptualCWERCdesign

PilotNeighborhoodSelectionandAssessment

PilotNeighborhood#1:ExpandedInnovationDistrict

PilotNeighborhood#2:LowerStonyBrook

CriticalSitingElements: AccesstoadequatesewagevolumeAvailablespaceOpportunitiesforreuseoftreatedwater

PilotNeighborhoodSelectionandAssessment

PilotNeighborhood#1:ExpandedInnovationDistrict

PilotNeighborhood#2:LowerStonyBrook

CriticalSitingElements: AccesstoadequatesewagevolumeAvailablespaceOpportunitiesforreuseoftreatedwater

MaximizingWaterandEnergyResourcesResourcetoWastetoResource

CommunityWaterandEnergyResourceCenter=CWERC

• Treatandresellaportionofthewater(MBR)

• Captureanduse/sellthermalenergy(heatpump/exchange)

• Produceanduse/sellbiogasthroughco-digestion(CHP)

• Capturenutrients(N)forresale

• Producecompostforresale(2tiers,separatingsludgeandSSOstreams)

MODELINGNeighborhoodscale

URBANSMARTSEWERING MODELSUBMODULES

FrontEndGeographicalVariables

SewerWater/Organic

WasteCharacteristics

TechnicalConstantsandGeographicalVariables

CalculationModule

CAPEXandOPEX

UrbanSmartSeweringObjectives

ProductsandRevenues

FinancialModelResults

BackEndGeographicalVariables

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

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

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

INTEGRATINGSTORMWATERMANAGEMENT

Marryingpotable,storm-,waste-,surfaceandgroundwatermanagementtorestorethenaturalwatercycle

NeighborhoodAssessment

NeighborhoodAssessment

StreamRestorationorCreation

StreamDaylighting-Visualization

GreenInfrastructureforFloodControlandFun

NON-MARKET(SOCIALWELFARE)ECONOMICANALYSIS

Manybenefitsexistoutsidetraditional“markets”

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

EXPANSIONANDREPLICATION

ReplacingacentralizedsystemwithadistributednetworkofCWERCsandextensivegreeninfrastructureimplementation

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

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)

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 508-675-5755jwood@crwa.org bdouglas@naturalsystemsutilities.com