ACTIFLO Process For Drinking Water Treatment

ACTIFLO Process ForDrinking Water TreatmentWATER TECHNOLOGIES

ACTIFLO Microsand Ballasted Clarification ProcessSince its intro introduction in 1989, ACTIFLO haswith algae, warm/cold water sources with high levelsbeen on theforefront of drinking water clarification.of organic carbon, hard water, soft water, groundwater,With over 900 installations worldwide, the ACTIFLO spring water, flashy rivers and streams, brackishprocess can be found efficiently treating low turbiditywater and sea water.mountain runoff, reservoirs Processwith Turbomix for Drinking Water Treatmentand SofteningTypical Actiflo PerformanceParametersRaw waterSettled waterTurbidity, NTUtreats upwards of2,000 NTU 2 -3 NTU*Total OrganicCarbon, mg/l3 - 252 -3Actiflo Carb 1 -2ACTIFLO is the compact clarification system that setsColor, PCU20 - 30010 - 15the bar for high rate clarifiers. The combination of 20Algae, counts/ml1,000 - 3,00075 - 95% removalyears of design experience and advanced flocculationIron, mg/l0.2 - 2.0Filtered Water 0.05results in an ACTIFLO process train with 8 minutes ofManganese, mg/l0.1 - 1.7Filtered water 0.04Softened Water150 - 500 mg/las CaCO₃ 35 mg/l Ca as CaCO₃ 50 mg/l Mg as CaCO₃hydraulic retention time and a clarifier loading rategreater than 30 gpm/ft .*depending on raw water qualityACTIFLO process consists of:ACTIFLO Cylinder DemonstrationA Conventional B Polymer Assisted C Ballasted Settlingσ Coagulation tank with mixing to promote chemical flocformationσ Maturation tank with Turbomix mixing that combinesfloc with recirculated microsand and polymer to form adense ballasted flocσ Lamella settling tank to capture residual solids andcollect settled materialσ Sand recirculation pumps withdraw the settled materialand convey this material to the hydrocyclonesABC3 secondsABC8 secondsσ The hydrocyclones separate the sludge from themicrosand and return the clean microsand to theprocess with the sludge being discharged to waste or tothe HCS systemσ Concrete single train capacities of 3 to 45 MGD, packageplant single train capacities of 0.2 to 7.0 MGD

Reducing the Volume of Sludge Producedσ The hydrocyclone overflow enters the repartitiondevice and a portion of it is maintained within therecirculation loop and a portion is discharged towasteMicrosand Ballasted Flocs to ndBaffleClarified WaterCoagulantSludgeSplitterσ The control of the proportions of recirculated flowversus discharged flow is maintained by a flowmeter and/or a TSS probe and a modulating NKFLOCCULATION TANKWITH TURBOMIXTMSETTLING TANK WITHLAMELLA AND SCRAPERRECIRCULATION PUMPEXTERNAL SLUDGE RECIRCULATION (HCS SYSTEM)σ The ballasted material in the settling tank is pumpedto the MA Hydrocyclone and the overflow of theHydrocyclone is sent into the recirculation loopACTIFLO Softening is designed to reduceHardness, Alkalinity, Silica and Heavy Metals byaddition of lime and/or Soda Ash.To sludge treatmentFlocs ballasted with microsandto the hydrocycloneRecirculation of carbonatesludgeσ The MA hydrocyclone is specifically designed forthe HCS system and incorporates a small amountof flush water to enhance the sludge recovery rateσ The HCS system is a simple sludge recirculation loop,which reduces sludge production by 50 – 80%.ACTIFLO SofteningLime/sodium carbonateσ The portion being recirculated does notre-enter the ACTIFLO settling tank, it stayswithin the sand recirculation circuitpHydrocycloneService waterPolymerCoagulantTreated waterSedimentation tank with mixers and scraperTurbomix flocculation tankRaw waterCoagulation tankInlet Hardness150 - 500 mg/l asCaCO3Rise Rate35 gpm/sfClarified Water 35 mg/l Ca as CaCO3 50 mg/l Mg as CaCO3TSS 10 mg/lTurbidity 1 NTUHYDREXTurbomix decarbonation/softening tankRecommended chemicals for ACTIFLO 3,000 SeriesDrinking water production4,000 SeriesEffective membrane antiscalants and cleanersapproved by major membrane manufacturers6,000 SeriesState-of-the-art clarification and wastewaterchemistry and application experience9,000 SeriesFormulated Microsand

ACTIFLO CARBKeeping Pace with Today’s Regulatory DemandsTo enhance the removal of Natural Organic Matter (NOM), Endocrine Disruptors, Taste and Odor and Pesticides theACTIFLO Carb process combines the benefits of ballasted clarification with the adsorption capacities of powderedactivated carbon (PAC). Used PAC DischargePAC Recirculation]Microsand Ballasted PAC Flocs to Hydrocyclone"MA" HYDROCYCLONEXFreshPACAdditionService WaterZCoagulantPolymerMicrosandClarified WaterBaffleRawWater[\YPAC PRE-CONTACTTANKCOAGULATIONTANKFLOCCULATION TANKWITH TURBOMIXTMSETTLING TANK WITHLAMELLA AND SCRAPERStep 1Fresh PAC additionStep 5Rapid settling and material recirculationStep 25 - 10 minute contact time with fresh and recirculatedPACStep 6Separation of sand from sludge and PAC with MAhydrocylconeStep 3Coagulant addition and floc formationStep 7PAC recirculationStep 4Polymer and microsand addition with TurbomixmixingKey Features and Benefitsσ Recirculation of PAC minimizes PAC doseComparative Footprintsand Rise Ratesσ Maximizes use of PAC adsorption sitesσ Reduces sludge volume and increases sludge solidscontentσ TOC removal rates improved up to 50% versusclarification aloneσ Ideal for direct or indirect potable reuse applicationsFlat -bottom Clarifier0.2 - 0.6 gpm/sfACTIFLO 30 gpm/sfDAF or Lamella Clarifier4 - 6 gpm/sfSludge Blanket Clarifier2 gpm/sf

Worldwide ReferencesThe ACTIFLO process is currently in operation worldwide in small communities and large metropolitan areas, as wellas in various installations for the treatment of industrial process water and effluents.Parker, COParker Water & Sanitation DistrictDrinking Water Treatment Plant10 MGD, first of its kind utilizing ACTIFLO ACTIFLOCARB as pretreatment to Ceramic Microfiltration fortreatment of both surface and reclaimed waterAlbuquerque, NMAlbuquerque Bernalillo CountyWater Utility Authority (ABCWUA)92 MGD drinking water facility that is thecornerstone of the San Juan-Chama DrinkingWater Project forf ABCWUAABCWUADrinking WaterMunicipal WWIndustrial W & WWLittle Falls, NJPassaicaic VallVValleyey WaterCommissionmission Treatment PlantSomersworth, NHCity of Somersworth DrinkingWater Treatment PlantCity of Tampa,TFLDavid L. Tippin WaterTreatment Facility6 MGD facility that treats high TOC and high turbidity toimprove disinfection by-products levels110 MGD drinking water treatmentupgrade completed within the limitedspace available at the existing plant40 MGD ACTIFLO plant withintermediate ozonation treating highinfluent organic levels ( 20 mg/L TOC)

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