and - NEWEA€¦ · * Sequencing Batch Reactors * Post Equalization Tanks MPTN WWTP Process * Post...
39
NEWEA/NYWEA Joint Spring Mee3ng Groton, Connec3cut June 7, 2016 The City of Groton, CT’s Public Awareness Campaign Suppor3ng WWTF Improvements and The Mashantucket Pequot Tribal Na3on’s WWTF Water Reuse Success Story Presenters Stephen Seigal P.E., BCEE, Tighe & Bond David Drobiak, Mashantucket Pequot Tribal Na3on
Transcript of and - NEWEA€¦ · * Sequencing Batch Reactors * Post Equalization Tanks MPTN WWTP Process * Post...
NEWEA/NYWEAJointSpringMee3ngGroton,Connec3cut
June7,2016
TheCityofGroton,CT’sPublicAwarenessCampaignSuppor3ngWWTFImprovements
andTheMashantucketPequotTribalNa3on’s
WWTFWaterReuseSuccessStory
PresentersStephenSeigalP.E.,BCEE,Tighe&Bond
DavidDrobiak,MashantucketPequotTribalNa3on
CityofGrotonWWTFUpgradeProjectBackground
Sludge Holding Tanks
Grit /Screenings Room
Covered Primary Clarifiers
Chlorine Contact Tank
Blower Building
Aeration Tanks
Secondary Clarifiers
Digesters
CityofGrotonWWTFUpgradeProjectGoals
■ Reduce unexpected repairs and operating budget impacts
■ Identify equipment and structures in need of rehab or replacement
■ Develop a phased capital improvement plan
CIPNeeds–Immediate/ShortTerm
Es$matedCost
$770,000
IssueRepairprimaryclarifiertanksandhatches
CIPNeeds–Immediate/ShortTerm
Es$matedCost
$1,400,000
IssueReplaceprimaryclarifierequipment
CIPNeeds–Immediate/ShortTerm
Es$matedCost
$408,000
IssueRepairconcreteatprimarypumpwetwellandflowdistribu3onstructures
CIPNeeds–Immediate/ShortTerm
Es$matedCost
$497,000
IssueReplacefinalclarifierequipment
CIPNeeds–Immediate/ShortTerm
Es$matedCost
$560,000
IssueReplaceboilerandheatexchanger
CIPNeeds–Immediate/ShortTerm
Es$matedCost$1,102,000
IssueReplaceelectricalservice/transformers,motorcontrolcenters,feeders,andligh3ng
CIPNeeds–Immediate/ShortTerm
IssueRenovateBlowerBuildingandRelocateLaboratory
Es$matedCost
$380,000
BlowerBuilding
ProjectCostSummary
Work performed by General Contractor $ 4.5 Million
Work performed by City, Engineering, $1.6 Million and Contingency TOTAL ESTIMATED PROJECT COST $6.1 Million
Groton’sPublicEduca3onCampaign
■ Mul3pleStepProgram
– EducateCityLeadersaboutNeedforProject
tpo TREATMENT PLANT OPERATOR
EducateCityLeadersabouttheProject
Groton’sPublicEduca3onCampaign
■ Mul3pleStepProgram
– EducateCityLeadersaboutNeedforProject
– EducatethePublic
EducatethePublic
■ City’sWebsite
EducatethePublic
■ City’sWebsite
■ Newspapers
EducatethePublic
EducatethePublic
■ City’sWebsite
■ Newspapers
■ FacilityTours
EducatethePublic
■ City’sWebsite
EducatethePublic
■ City’sWebsite
■ Newspapers
■ FacilityTours
■ Video
TheMashantucketPequotReclaimedWaterProcess;
ThePro&Cons
DavidDrobiak,Superintendent,MPTNWWTP102TrolleyLineBoulevardMashantucket,CT06338
* 1993-MashantucketPequotTribalNation(MPTN)buysLakeofIsles(LOI)property
* 1998-MajorexpansionatWastewaterTreatmentPlant
* 2000-MPTNbuildstwo18holechampionshipgolfcoursesusingreclaimedwaterirrigation
ReclaimedWaterHistory
* ModificationstotheexistingWWTFincluded:
* addSBRtank(SBR4)* retractablediffuserstoSBR3&4* UVdisinfectionsystemupgrade
* centrifugeforsolidshandling
ReclaimedWaterHistory2003SystemUpgrade
* TheLOIGolfCourseusesan800,000gallonreclaimedwaterstoragetank
* Wateringoccursbetweenthehoursof9PM-3AM
* Variablespeedpumpsfillthestoragetankonacontinuousbasis
SystemOperation
MPTNWWTPProcess
* TheMPTNWWTPProcessincludes:
* InfluentScreening
* SequencingBatchReactors
* PostEqualizationTanks
MPTNWWTPProcess
* PostEffluentFiltration
* Eachfilterhasanaveragecapacityof1.5mgd
* Mediaisa10micronnylonpilecloth
MPTNWWTPProcess
* UVDisinfection
* TrojanUV3000Pluswith3banksof80bulbseach
* Provides≥100mw/cm2<70%transmittanceatapeakcapacityof5.7mgd
MPTNWWTPProcess
MPTNWWTPProcess
* FinalEffluentStorageDisinfectedorDisposalto:
* RapidInfiltrationBeds
* ReclaimedWaterStorageTank
* WasteActivatedSludgeHoldingTanks
* SludgeHandlingFacility
* UltimateDisposal-Incineration
* ReuseispermittedfromApril1throughOctober30
* NosprayapplicationofReclaimedwaterduringrainfall,afterleaffall,orexcessivewindyperiods
* Syringingofgreenswithhandheldhosewhennooneotherthanmaintenancepersonnelarewithin50ft
DischargePermitHighlights
* PermitLimits:* BOD–10mg/l
* TSS–5mg/l
* TotalNitrogen–10mg/l
* TotalPhosphorus–1mg/l
* Turbidity–<2.0NTU
* MaxDailyFlow–1,200,000gpd
* ChlorineResidual–0.2–1.5mg/l
* FecalColiforms–Nottoexceed2.2col/100mL
* UVDosage–Needtomaintainatleast100mWsec/cm2
DischargePermitHighlights
5parametersthatrequireceasingreclaimedwater:
* TheUVdoseisnotmet
* Turbidityexceeds2NTU
* Chlorineresiduallimitinnotmet
* Fecalcoliformexceeds2.2col/100mL
* Totalphosphorusexceeds1.0mg/l
DischargePermitHighlights
* Pros—
* It’sbenefitstotheenvironmentaresubstantial
* Itextendsthelifeexpectancyoftherapidinfiltrationbeds
* Thecostsavingsissubstantial.Potablewaterversusreclaimedwateris6timesthecost
ReclaimedWaterSystemPros&Cons
* Cons–* Thestringentdischargepermitnecessitates:
* Constantmonitoring
* Dailyadjustments
* Repairs
* ReplacementofEquipment
* Maintenance
* Troubleshooting
SystemPerformancePros&Cons
* Forthepast6yearsthesystemhaslargelyoperatedasintended
* Suppliedover160milliongallonsofreclaimedwatertoLakeofIsles,withover300milliongallonssince2006
Summary
Thankyouto:MichaelBoland–MPTN,Directorof
NaturalResourcesJenniferPorter–MPTN,Admin
AssistantIIforUtilities&Wastewater
