co-digescon with · cheri cousens, glsd richard weare, glsd benjamin mosher, cdm smith ... •...

NEWEA–2018AnnualConference&Exhibit

January22,2018

TheNextStepTowardsNetZeroOperaConattheGreaterLawrenceSanitaryDistrict

CheriCousens,GLSDRichardWeare,GLSDBenjaminMosher,CDMSmithMichaelWalsh,CDMSmith

Co-DigesConwithFoodWasteOrganics

NEWEA–2018AnnualConference&Exhibit

TheNextStepTowardsNetZeroOperaConatGLSD

§  Background§  ProjectDrivers§  TheProject§  ConstrucCon&Pilot

ProgramStatus§  ProjectedBenefits

2

NEWEA–2018AnnualConference&Exhibit

GLSDBACKGROUND

§  EstablishedbyMassachuseWsLegislaConin1968

§  OperaConalSinceApril1977§  GovernedbyaBoardofCommissioners§  SecondlargestWWTPinMassachuseWs

(52mgdaverage/135mgdpeakdesign)§  Interceptors

§  9Miles§  24”through108”

§  RiversidePumpStaCon§  2-800HPpumps§  2-1,250HPpumps

3

NEWEA–2018AnnualConference&Exhibit

TheGreaterLawrenceSanitaryDistrict(GLSD)

4

Salem

Andover

NorthAndover

NH

MA

RegionalWWTF

Methuen Lawrence

Merrimack

River

Dracut

NEWEA–2018AnnualConference&Exhibit

EvoluConofBiosolidsManagementatGLSD

5

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

6

NEWEA–2018AnnualConference&Exhibit

LimitedNewEnglandDigesConFaciliCes

§  AcceptableoutletsincludedigesConfaciliCes

§  GLSDisoneofonlysixinMassachuseWs

§  SecondlargestdigesConfacilityinMassachuseWs

7

R.I.19(1)

MASS.118(6)

NEWEA–2018AnnualConference&Exhibit

Co-DigesCon

8

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

13

TheProject

NEWEA–2018AnnualConference&Exhibit15

GLSDOrganicstoEnergyProjectComponents

NEWEA–2018AnnualConference&Exhibit

FoodWasteOrganicstoEBS®anEngineeredBioslurry

1616

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

18

NEWEA–2018AnnualConference&Exhibit

BiogasConveyanceandTreatment

19

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

22

NEWEA–2018AnnualConference&Exhibit

CHPEngineEmissionsControl

§  OxidaConCatalyst(OC)technologytoremovevolaCleorganicscarbonsandcarbonmonoxide

§  SelecCveCatalyCcReducCon(SCR)technologytoremovenitrogenoxides

§  BestAvailableControlTechnology(BACT)asdeterminedbyMassDEP

23

NEWEA–2018AnnualConference&Exhibit

CurrentProjectStatus

24

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

25

NEWEA–2018AnnualConference&Exhibit

PilotProgramObjecCves&IniCalFindings

26

•  AssesslogisCcalissuesassociatedwithreceivingandprocessingtheSSOmaterial

•  DeterminetheincreaseingasproducCon•  EvaluateADoperaCngparameters•  Determineimpactsoncentrifuge

performance,polymerusageandcentratecharacterisCcs

•  Determineimpactofcentrateonsecondarywastewatertreatment

•  DetermineimpactofSSOmaterialondewateringandthermaldryingoperaCons

•  DetermineimpactsonferClizerpelletproducConquality.

26

ObjecOves IniOalFindings

•  PumpingisuniqueforSSO•  Meteringshouldbewithfoodgradedevices•  NoadverseimpactstoADoperaCons•  CentrifugePerformance

–  Torquehasincreased–  Lesspolymerusage–  NochangeincentratecharacterisCcs

•  Noincreaseindigestersludgevolumestothermaldryingfacility

•  NoimpactonferClizerpelletproducConorquality

NEWEA–2018AnnualConference&Exhibit27

PilotProgramBiogasProducCon

NEWEA–2018AnnualConference&Exhibit

CurrentProjectStatus

28

NEWEA–2018AnnualConference&Exhibit

Challenges

§  FinancinganAtypicalWastewaterProject(costsvs.revenues)

§  NetMeteringCap§  CommunityAcceptance§  SecuringFeedstock§  Permivng(AirandNoisePolluCon

Control)§  EngineOperaConsand

Maintenance§  MarketAnalysis

29

NEWEA–2018AnnualConference&Exhibit

Successes

§  Improvedfacilityresiliencyandreliability§  Providesaneteconomicbenefittothe

DistrictanditsmembercommuniCes§  Upto$2.5Mannualpowersavings

§  18millionKWH/year

§  $9.8MinFinancialAssistance§  UpdatedHostCommunityAgreement§  ElectricalInterconnecConAgreement§  ProcurementofOrganicMaterial§  FurthersGLSD’sTradiConofInnovaCon

andGoalofNetZeroOperaCon

30

NEWEA–2018AnnualConference&Exhibit

ProjectPartners

31

NEWEA–2018AnnualConference&Exhibit

Contactus!

32

RichardWeare(978)685-1612rweare@glsd.org

MichaelJ.Walsh,P.E.(617)452-6535Walshmj@CDMSmith.com