SCOTT AST™ DRYER

Why we need Clean Water &Greener Grass…………

‣Mixing‣Drying‣Feeding‣Sampling‣Weighing‣Packaging‣Conveying‣Dust Collection‣Instrumentation‣Bulk MaterialsProcessing

SCOTTBiosolids SystemThe BEST Complete Biosolids Drying System

Diversified Markets Agriculture Mineral Pet Food Chemical Pharmaceutical Rendering Food Plastic Wood FoundryServices Testing Facility Equipment Rental Program On-Site Repair Service

CustomerIndex3M COMPANYA. SCHULMANA.L. GILBERTADMALABAMA FEEDALLEN BRADLEYALLIED MILLSALLIED SIGNALALPO PET FOODAMERICAN CYANAMID CO.AMERICAN INSTANTS INC.AMERICAN PROTEINSANCOMEXANDERSON INTLATOCHEMB.F.I.BASFBAUSCH & LOMBBEACON MILLINGBETHLEHEM STEELBIG GRAINBIG SPRING MILLBORDEN CHEMICALBORTON PACKAGINGBRISTOL MEYERSBUNGE FOODSCAGLES FEED MILLSCAMPBELL SOUPCANADIAN GYPSUMCARGILLCARROL’S FOODSCENEXCENTRAL SOYACHEMDOLCHEVRON CHEMICALCIBA-GEIGYCOLORITE PLASTICSCON AGRACONTINENTAL NITROGENCONTINENTAL GRAINCOOPER FARMSCROMPTON & KNOWLSCRYSTAL FARMSDARLING DELAWAREDOMAINDOMTAR GYPSUMDOW CHEMICALDUPONTEASTMAN KODAKECO LABELI LILLYENGELHARDEUCLID CHEMICALEVERPUREFARMLANDFEED RITEFERMENICHFMC CORPFORD MOTOR CO.FORMA FEEDFOSTER FARMSFS GROWMARKGENERAL MILLSGEORGIA PACIFICGEORGIA PROTEINGILSTERGOLDEN SUN FEEDGRAIN PRODUCTSGRAMCOGREAT LAKES CARBONGRIFFIN INDUSTRIESHB FULLERHEINZHERCULESHERSHEYHILLS PET PRODUCTSHOESCHT-CELANESEHONDA OF AMERICAHORMEL FOODSHUBBARD MILLINGHUDSON FOODSHUISH DETERGENTHUNT WESSONHYLINEIAMS COMPANYIBPICIINDIVINTL MULTIFOODSJAMES RIVER LIMESTONEJENNIE O FOODSJEROME FOODSJM HUBERJOHNSON MATTEYJR SIMPLOTKAL KANKIMBERLY CLARKKRAFT/GENERAL FOODSLAND O LAKESLEAF CORPLEMNA CORPLEVER BROTHERSLIPTON TEALOCKHEED MARTINLOCKITEM & M MARSMALT O MEALMARSCHALL PRODUCTSMc CORMICK SPICEMERCK PHARMACEUTICALMILK SPECIALITIESMOBILE CHEMICALMONARCH FOODSMONSANTOMURPHY FARMSNABISCONATIONAL STEEL NATURAL BY-PRODUCTSNEENAH FOUNDRYNESTLENORCI CHINOOKNUTRENAOCCIDENTAL CHEMICALOHM CORPORE IDAOWENS CORNINGPENFORD PRODUCTSPERDUEPFIZER INC.PHILLIP MORRISPILLSBURYPOLY CARBONPOLY FLEXPRESTAGE FARMSPURETEKQUAKER OATSQUIKRETERALSTON PURINAREICHEL & DREWSRHOME & HAASRHODIARJ REYNOLDSSAFETY KLEENSANDERSON PLUMBINGSANDOZ NUTRITIONSAUDER WOOD WORKINGSAVANAH SUGARSEABOARD FARMSSENECA FOODSSIGMA CHEMICALSMITH KLINE BEECHUMSOUTHERN STATESSWISS MISSTYSON FOODSUNIROYALUNITED STATES GYPSUMUNITED SUPPLIERUNOCALW.R. GRACEWAUPACA FOUNDRYWESTINGHOUSE

ProductLineMixing EquipmentHorizontal Ribbon MixerHorizontal Paddle MixerPlow MixerRotary Drum MixerTwin Shaft Batch MixerBlending EquipmentMinute Mix 200PugmillTender Blend MixerHigh Speed Turbo BlenderSize ReductionASM Fine GrinderDominator CrusherShredderizerTurbo SeparatorTurbo GrinderStorage EquipmentSmooth-Wall Storage BinsProcessing EquipmentAST Dryer (patented)Particulate Capture Unit (patented)CoolerSeparator

Scott Equipment CompanyA global provider of processing equipmentthroughout the United States and manyforeign countries.GlobalIntegrationAUSTRALIABARBADOSBOLIVIABRAZILCANADACHILECHINADOMINICAN REPUBLICECUADOREL SALVADORENGLANDGERMANYGUATEMALAHOLLANDHONDURASINDIAINDONESIAIRANIRELANDJAMAICAJAPANKOREAMALAYSIAMEXICONEW ZEALANDNICARAGUANIGERIAOMANPHILIPPINESPUERTO RICORUSSIASAUDI ARABIASINGAPORESCOTLANDTAIWANTHAILANDTURKEYTURKMENISTANUKRAINEVENEZUELAVIETNAM

Engineering FirmsServiced by Scott Equipment CompanyEngineeringFirmsA.V.C.A.BECHTELBORTONBURNS & McDONNELLC J SCHNIEDERCFWCOLTDEAN OLIVERE.A.P.C.EPSTEINFLUOR DANIELJOHN BROWNKEN BRATNEYJACOBS ENGINEERINGLOCKWOOD GREENMILL TECHNOLOGYMILLPOINT INDUSTRIESMORRISON-KNUDSENO.A. NEWTONPARSONS ENGINEERINGPMIPSIRAYTHEONREIMELTRO-TECHSEISIMONS-EASTERNSTONE & WEBSTERSUNFIELD ENGINEERINGSVERDRUPT.E. IBBERSONTHE WASHINGTON GROUPTODD & SARGENTWAGESTER LEASEWOLVERINEYOUNGLOVE

AST Drying System and Dryer ShaftDUST COLLECTORCOLLECTS PRODUCTFROM THE AIR STREAM

Looking for sewagedisposal alternativesbecause of…• Storage limitations• Seasonal spreading OR land shortage• Increased likelihood of effluent permit violations• Operational problems…then look to SCOTTfor the answer.

Why SCOTT EQUIPMENT?• Over 38 years experience• Quality custom equipment• Proven track record• Responsive to customer’s s needs• Patented AST Dryer• In-house testing facility• Family owned and operated• Diverse customer base

Why Scott Biosolids System ?• The BEST Complete Biosolids Drying Package on the Market• ECONOMICAL• “Top-Notch” Engineering, Fabrication, Installation• Produces Pathogen Free, Class A Sludge• No more storage & sludge spreading problems• Produces a marketable product• Superior Customer Service

Operation Overview‣ 2% Solids entering dewaterer‣ 20% Solids entering AST Dryer‣ 90% Solids entering pellet mill

Scott Biosolids System OverviewFan Vented ToAtmosphere OrThru BaghouseCollectorFanCoolerShakerFinesBin20%SolidsBinPellet MillElevatorBeltPressMixerFeederASTDryerFilterBaghouseFanPellet PlantBaggerLoad Out orDown-StreamProcessing

SCOTTAST DRYER• Reduces sludge moisture from 90% to 10% in a single pass•

Advantages to Heat Drying• Volume reduction (approximately 75%)• Class A (pathogen reduction)• Relatively simple to control• No chemical or lime addition costs• Low odor production (when used withaerobically digested solids)• Cool, Clean (dust free) product

AST Dryer System

Success in Hutchinson, MinnesotaCity of Hutchinson, MN Biosolids System• Approximate population 11,500• Sludge is dewatered using two belt filter presses• Sludge is dried in AST Drying System• Product is made into pellets or granular form• Finished product is applied to city parks and golfcourse lawns

AST Dryer CalculationsLbs. Products/hr. = 5000 Discharge % moisture = 10Specific Heat = 0.50 Discharge Temp F = 180Inlet % Moisture = 80 Air Temp In – Dew Point = 70Inlet Temp In F = 70 Air Temp Out F = 260Max Temp @ Burner = 900PRODUCT GOING IN1) 5,000 LBS./HR. of PRODUCT IN2) 4,000 LBS. WATER3) 1,000 LBS. SOLIDSPRODUCT OUT OF DRYER4) 1,111 LBS5) 111 LBS. WATER6) 1,000 LBS. SOLIDSNEED TO REMOVE7) 3,889 LBS. WATER/HR.BTU’S REQUIRED 20,400 10,000 SCFM8) 55,000 BTU to heat solids9 ) 3,888,889 BTU to evaporate water10) 440,000 BTU heat to water11) 2,052,000 BTU to heat SCFM12) 643,589 BTU to heat losses7,079,478 TOTAL BTU’s REQUIREDAIR TEMP IN15) 726 Air temp required into DryerWEIGHT OF GASES16) 750.0 LBS. of air per minute17) 64.8 LBS. water vapor per minute0.000 Static Density of Vapor680.0 LBS. Water Vapor In/Min.195.1 Total Water Vapor Out/Min.135 Dew Point of Air OutACFM CALCULATION13) 13,585 ACFM14) 1,815 ACFM Water Vapor15,400 Fan Needs to Handle ACFM of Vapor

Hutchinson, MinnesotaDelivery of theScott AST Dryer at the newHutchinson WastewaterTreatment Facility

Hutchinson, MinnesotaScott AST Dryer set-up andinstallation at theHutchinson WastewaterTreatment Facility

AST Dryer Shaft

Installed AST Dryer

Hutchinson, MinnesotaFeeder, AST Dryer,Burner, andBaghouse installed.Below, internalpaddles of theScott AST Dryer.

Exhaust Fan, Duct Work & BaghouseBaghouse for AST DryerExhaust StackDuct work between theDust Collector andExhaust FanSound enclosure whichsurrounds the fan toabate noise.

Mixer Feeder System

Mixer Feeder Main Agitator

Cake Feeder

Cake Feeder Main Agitator

Scott Equipment Test Lab

Positives of PelletingA practical & economical way to enhance product value and manageability

Complete Pelleting System• Pellet Mill• Pellet collecting cyclone• Automatic Pellet Cooler• Shaker Screen• Air conveying System• FanFan Vented ToAtmosphere OrThru BaghouseCollectorCoolerBinShakerFinesFanPellet MillElevatornPellet Plant

Pellet Mill Advantages• Produces a cool, cleanproduct• Produces a marketableproduct in pellet form• Heavy-duty pellet millconstruction• Durably built to operate24 hours a day• Excellent pellet quality

System InstallationHutchinson, MN

Equipment InstallationHutchinson, MN

Pellet Plant InstallationHutchinson, MN

Storage System“Smooth-Wall” Modular Steel Panels• Fabricated with two heavy-gaugesteel walls with 3½” 3of air spacebetween providing insulationagainst condensation and freezing• Assembled to form any size binfrom 12’ x 12’ and smaller to70 feet in height• Considerably faster to assemblesaving in labor costs• Prefinished with durablealuminized sheets or tough,weather-resistant resistant enamel

Typical Gasification for Steam &Power

AST Rental Drying System

Why Scott AST Bio Solids Dryer‣ Most Versatile Dryer on the Market.‣ 90% Moisture to under 10% in one pass‣ Less than 60 seconds retention time‣ Class A Sludge‣ Easy to use complete PLC from start up to shut down‣ Usually requires only one operator to run‣ No back mixing required‣ System can be used as stand alone or in conjunction with a Gassiferand turbon‣ Cost efficient per pound of water removed‣ Cost less than most other dryers.

Thank You!We hope you enjoyed thispresentation on theScott Biosolids System.