co-digescon with · cheri cousens, glsd richard weare, glsd benjamin mosher, cdm smith ... •...
TRANSCRIPT
NEWEA–2018AnnualConference&Exhibit
January22,2018
TheNextStepTowardsNetZeroOperaConattheGreaterLawrenceSanitaryDistrict
CheriCousens,GLSDRichardWeare,GLSDBenjaminMosher,CDMSmithMichaelWalsh,CDMSmith
Co-DigesConwithFoodWasteOrganics
NEWEA–2018AnnualConference&Exhibit
TheNextStepTowardsNetZeroOperaConatGLSD
§ Background§ ProjectDrivers§ TheProject§ ConstrucCon&Pilot
ProgramStatus§ ProjectedBenefits
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NEWEA–2018AnnualConference&Exhibit
GLSDBACKGROUND
§ EstablishedbyMassachuseWsLegislaConin1968
§ OperaConalSinceApril1977§ GovernedbyaBoardofCommissioners§ SecondlargestWWTPinMassachuseWs
(52mgdaverage/135mgdpeakdesign)§ Interceptors
§ 9Miles§ 24”through108”
§ RiversidePumpStaCon§ 2-800HPpumps§ 2-1,250HPpumps
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NEWEA–2018AnnualConference&Exhibit
TheGreaterLawrenceSanitaryDistrict(GLSD)
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Salem
Andover
NorthAndover
NH
MA
RegionalWWTF
Methuen Lawrence
Merrimack
River
Dracut
NEWEA–2018AnnualConference&Exhibit
EvoluConofBiosolidsManagementatGLSD
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Vacuum Filter
Dewatering
Multiple- Hearth
Incineration
Waste Activated Sludge
Primary Sludge
Waste Activated and Primary Sludges
Belt Filter Press
Dewatering Cake to Off-Site Disposal (1/3 Total)
Liquid to Off-Site Disposal (2/3 Total)
Original Solids Train (1977 to 1989)
Modified Solids Train (1989 to 2002)
Ash to Landfill
Gravity Thickening
Gravity Thickening
DAF Thickening
Anaerobic Digestion
Thermal Drying
Waste Activated Sludge
Primary Sludge
Current Solids Train (2002 to 2016)
Beneficial Reuse
Gravity Thickening
Gravity Belt Thickening
Centrifuge Dewatering
NEWEA–2018AnnualConference&Exhibit
MassachuseWsOrganicWasteDisposalBan
§ EffecCveOctober1,2014–Producersof>1tonoffoodwasteperweekbannedfromlandfillsorincinerators
§ Impactshotels,restaurants,universiCes,hospitals,supermarkets,foodprocessorsandwholesalers
§ MassDEPesCmates350,000tonsoforganicwastewillbedivertedfromlandfillsyearly
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NEWEA–2018AnnualConference&Exhibit
LimitedNewEnglandDigesConFaciliCes
§ AcceptableoutletsincludedigesConfaciliCes
§ GLSDisoneofonlysixinMassachuseWs
§ SecondlargestdigesConfacilityinMassachuseWs
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R.I.19(1)
MASS.118(6)
NEWEA–2018AnnualConference&Exhibit
Co-DigesCon
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Wastewater Sludge
Organic
Waste
Glass Plastic
Cardboard
Sidestream
Anaerobic Digestion
Power
Effluent
Heat
Biogas Treatment
and Use
Biogas
Class A Biosolids
Biosolids Processing
Wastewater Treatment
Pre-Processing
NEWEA–2018AnnualConference&Exhibit
ImpactofCo-DigesCononBiogasProducCon
BiosolidsSourceSeparatedOrganic(SSO)FoodWaste
FeedStock(Gal/Day) 10,000 10,000
Solids(%) 5 13
VolaCleSolids(%) 75 85
VolaCleSolidsConverted(%) 55 82
BiogasYield(CubicFeet/lb) 15 13.5
BiogasVolume(CubicFeet/day) 26,000 102,000
EnergyProduced(MMBTU/day) 14 56
PotenOalElectricalProducOon(kWH/yr) 600,000 2,300,000
NEWEA–2018AnnualConference&Exhibit
TheEconomicsofCo-DigesCon
Credits• Revenue• TippingFees• AlternaCveEnergyCredits• RenewableEnergyCredits
• AvoidedCost• PurchaseofUClityElectricity• FutureIncreasesinEnergyCosts
• GrantsandIncenCves• MassDEP• MassCleanEnergyCenter• MassDepartmentofEnergyResources• NaConalGrid(ElectricSupplier)
Costs• Capital• SSOReceivingFaciliCes• ExpansionofExisCngDigesConSystem• BiogasTreatment• CombinedHeat&Power(CHP)FaciliCes• CHPEmissionsControl
• OperaConsandMaintenance• IncreasedDewatering/DryingCosts• CHPMaintenance• BiogasMediaReplacement
NEWEA–2018AnnualConference&Exhibit
HistoricalBiogasData(Analysisof2013–2016)
Oxygen:02 1.2%Nitrogen:N2 3.8%
Methane:CH4 60%CarbonDioxide:CO2 35%HydrogenSulfide:H2S 73ppmv
w/FerricChlorideBTU/CF 605
Sp.Gravity 0.9Siloxanes 1110ppbv
NEWEA–2018AnnualConference&Exhibit
ExisOngBiogasTreatmentandUses
Treatment:MoistureRemoval–DripTraps GLSDBiogasGlycolBoiler
NEWEA–2018AnnualConference&Exhibit
GLSDCo-DigesConFeasibilityStudy(June2013)
§ Couldprocess~28,000gpdofSSOmaterialinexisCngdigesConsystem
§ Couldprocessupto92,000gpdofSSOmaterialwithaddiConof4thdigester
§ Canmeetupto40%oftheCommonwealth’sgoalforSSOdiversion
§ EconomicsarehighlydependentonvolumeofSSOmaterialreceived&energycredits
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TheProject
NEWEA–2018AnnualConference&Exhibit15
GLSDOrganicstoEnergyProjectComponents
NEWEA–2018AnnualConference&Exhibit
FoodWasteOrganicstoEBS®anEngineeredBioslurry
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CORe®SSOReceiptHopper&Bioseparator EBS®Product
EBS®Mixing&StorageTank
NEWEA–2018AnnualConference&Exhibit
OrganicWasteReceivingandConveyance
TruckOffloadStaCons
ReceivingTanks
PumpedMix
System
SSOTransferPumps
NEWEA–2018AnnualConference&Exhibit
AnaerobicDigesterNo.4
§ 1.4-MGvolume§ Draptubemixers§ Steelgas-holdingcover§ SpaceavailablewithinexisCng
DigesterBuildingforDigesterNo.4heaCngandpumpingequipment
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NEWEA–2018AnnualConference&Exhibit
BiogasConveyanceandTreatment
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Fixedmedia(ironsponge)forhydrogensulfidetreatment
Carbonmediaforsiloxanetreatment
Expandedgasconveyancecapacity
Newflareforincreasedcapacity
NEWEA–2018AnnualConference&Exhibit
NEWEA–2018AnnualConference&Exhibit
NEWEA–2018AnnualConference&Exhibit
CombinedHeat&Power(CHP)Engines
§ TworeciprocaCngCHPgenerators§ Totalcapacityof3.2MW§ Spaceforfuturethirdengine§ Powerfedtositeelectricalsystem
andnetmeteredtotheuClitygrid§ Projectedavgpowerdemands:
§ Plant:1,700kW(onsite)§ RSPS:700kW(vianetmetering)
§ Heatcapturedtosupplydigestersandotheron-siteheaCngdemands
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NEWEA–2018AnnualConference&Exhibit
CHPEngineEmissionsControl
§ OxidaConCatalyst(OC)technologytoremovevolaCleorganicscarbonsandcarbonmonoxide
§ SelecCveCatalyCcReducCon(SCR)technologytoremovenitrogenoxides
§ BestAvailableControlTechnology(BACT)asdeterminedbyMassDEP
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NEWEA–2018AnnualConference&Exhibit
CurrentProjectStatus
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NEWEA–2018AnnualConference&Exhibit
ProjectConstrucConCosts
§ ConstrucConBidCost: $25,713,966§ GrantsandIncenCves
§ MassachuseWsCleanEnergyCenter $400,000§ MassachuseWsDepartmentofEnvironmentalProtecCon $500,000§ MassachuseWsDepartmentofEnergyResources $5,000,000§ NaConalGrid $2,340,000§ MassDEPPrincipalForgiveness $1,597,994
TotalGrantsandIncenCves $9,837,994
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NEWEA–2018AnnualConference&Exhibit
PilotProgramObjecCves&IniCalFindings
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• AssesslogisCcalissuesassociatedwithreceivingandprocessingtheSSOmaterial
• DeterminetheincreaseingasproducCon• EvaluateADoperaCngparameters• Determineimpactsoncentrifuge
performance,polymerusageandcentratecharacterisCcs
• Determineimpactofcentrateonsecondarywastewatertreatment
• DetermineimpactofSSOmaterialondewateringandthermaldryingoperaCons
• DetermineimpactsonferClizerpelletproducConquality.
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ObjecOves IniOalFindings
• PumpingisuniqueforSSO• Meteringshouldbewithfoodgradedevices• NoadverseimpactstoADoperaCons• CentrifugePerformance
– Torquehasincreased– Lesspolymerusage– NochangeincentratecharacterisCcs
• Noincreaseindigestersludgevolumestothermaldryingfacility
• NoimpactonferClizerpelletproducConorquality
NEWEA–2018AnnualConference&Exhibit27
PilotProgramBiogasProducCon
NEWEA–2018AnnualConference&Exhibit
CurrentProjectStatus
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NEWEA–2018AnnualConference&Exhibit
Challenges
§ FinancinganAtypicalWastewaterProject(costsvs.revenues)
§ NetMeteringCap§ CommunityAcceptance§ SecuringFeedstock§ Permivng(AirandNoisePolluCon
Control)§ EngineOperaConsand
Maintenance§ MarketAnalysis
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NEWEA–2018AnnualConference&Exhibit
Successes
§ Improvedfacilityresiliencyandreliability§ Providesaneteconomicbenefittothe
DistrictanditsmembercommuniCes§ Upto$2.5Mannualpowersavings
§ 18millionKWH/year
§ $9.8MinFinancialAssistance§ UpdatedHostCommunityAgreement§ ElectricalInterconnecConAgreement§ ProcurementofOrganicMaterial§ FurthersGLSD’sTradiConofInnovaCon
andGoalofNetZeroOperaCon
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NEWEA–2018AnnualConference&Exhibit
ProjectPartners
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NEWEA–2018AnnualConference&Exhibit
Contactus!
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RichardWeare(978)[email protected]
MichaelJ.Walsh,P.E.(617)[email protected]