ENGR - EXPO 2023 - (CE) - Solids Management

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SOLIDSMANAGEMENTIMPROVEMENTPROJECT TRINITYRIVERAUTHORITY,DALLAS,TX

EdwardBlack|BrandonBoyd|HarrisonBashaw|NoahThrom

Sponsors:KierstenLee,EmMinner,EstherNadarajan|FacultyAdvisor:Dr.RichardNielsen|SpecialThanks:Dr.ErikCoatsandDr.DanCordon

COSTESTIMATE

ENGINEER’SOPINIONOFPROBABLECOST

•Mixing8batchesofsludgeperday

•Eachbatchtakes75minutes

•17.3cubicyardsofsludgeperbatch

•10,490gallonsofwaterperbatch

•2,025poundsofbakingsodaperbatch

•Mixingbyrecirculationpumpsandstationarymixers

SludgeParameters:

•25-32%Solids

•0mgCaCO3/L

•pH7.2-8.4

•65-75°F

SlurryParameters:

•6-10%Solids

•8,000-10,000mgCaCO3/L

•pH7.2-8.4

•95-105°F

SLURRYHEATING

•120’x165’concretepadfortemporarysystems

•Sludgeoffloadareaonpad’ssouthside

•Sludgeandbakingsodawillbestockpiledintransferarea

•Skidsteerwilltransfersludgeandbakingsodafrom loadingareatothemixingbasins

•ShellinTubeheatexchangerusingparallelflow

•HeatingMedium:SteamtoWater

•AmbientTemperature:67°F

•EndTemperature:100°F

•Area:197ft

•Efficiency:52%

•Batcheswillbesampledviadipstickandtestedforallslurry parameters •Shipping35truckloadsofsludgefromD.C.toDallas

SUSTAINABILITY

2023CapstoneProject
BACKGROUND TRANSPORTATION SITELAYOUT MIXING TrinityRiverAuthorityWastewaterTreatmentPlant •Treats198milliongallonsofwastewaterperday
Serves1.4millionpeopleinDallas-FortWortharea
Plantisupgradingprocessestoadvancedmesophilic anerobicdigestion
•
•
TruckscheduleMonTueWedThurFriSatSunMonTuesWed Trucks1-5Ship Trucks6-10Ship Trucks11-15Ship Trucks16-20Ship Trucks21-25Ship Trucks26-30Ship Trucks31-35ShipArrive Arrive Arrive Arrive Arrive Arrive Arrive TimeLoadingMixingUnloadingLoadingMixingUnloadingLoadingMixingUnloading 9:00-9:15AMx-------9:15-9:30AMx-------9:30-9:45AM-x-x----9:45-10:00AM-x-x----10:00-10:15AM--x-x-x-10:15-10:30AM----x-x-10:30-10:45AMx----x-x10:45-11:00AMx------x11:00-11:15AM-x-x----x Basin1Basin2Basin3
•Shipping5trucksfullofsludgeperday •27.7cubicyardsofsludgepertruck •Totalvolumeof961cubicyardsofsludge
SLUDGETRANSPORTATION $357,900 MIXING $42,500 PIPESANDFITTINGS $99,100 PUMPS $11,300 CONCRETEPAD $91,200 ALKALINITY $7,200 15%CONTINGENCY $37,700 TOTALCOST $647,000

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