The UV Validation Process - What's New - Ohiowater.org

LT2 UV Dose Requirements for TargetedPathogens

Validation Management• Test and Verify the “Dose” Delivery Performance of UV reactorswithin their prescribed operating envelope of flow rate, power,UVT, etc.• Cryptosporidium, Giardia and/or virus removal credits for drinkingwater systems – validations must be done at full scale• Trend is toward testing at off-site facilities – Two are in the U.S.:• Portland, OR• Johnstown, NY (HDR|HydroQual UV Center)• The equipment supplier generally manages this validation requirementwithin the procurement process for the systems it offers commercially• Owner/engineer can also manage – generally with a pre-purchaseapproach.Regulatory interaction and approval – importantto the process

Validation Protocols - Drinking Water andReusevion is• US EPA Ultraviolet Disinfection Guidance Manual(UVDGM, 2006). M• Controls the drinking water market – nationally and, in large part,internationally.• NWRI/AwwaRF (2003) “UV Design Guidelines for Reuseand Drinking Waters”. (3 rd Edition Announced August2012)• Controls the reuse market – with a mix of UVDGM QAprotocols. International trend to use UVDGM for reusevalidations

Validation Process - BiodosimetryThis is the “Reduction EquivalentDose” or RED

Biodosimetry: Calculated-Dose Approach(per UVDGM Protocols)• Test matrix designed and implemented across a definedoperating envelop of flow, power, sensor, number oflamps, UVT, etc.• For example, three variables: 3 x 3 x 3 = 27 points(minimum)• From the test data, and RED algorithm is developed. Forexample:REDcalc10aQ10• This operating envelop is established by the validationrange of the reactor – if operating outside these variableranges, the water is “off-spec”b ScdA254

RED (mJ/cm 2 )Example of Biodosimetric Test Results1009080706050403080% UVT85% UVT92% UVTBoundaries EstablishOperating Envelope96% UVT201000 500 1000 1500 2000 2500Flow (gpm)

Validated Performance to Yield CreditedRED val > Dose RequiredRED val = RED Calc /VForLI val = LI Calc /VFRED and LIWhere:• LI Calc and RED Calc are based on LI or dose algorithm, as afunction of operating variables.• VF is the Validation Factor, which accounts for certainpotential biases and experimental uncertainty

Biodosimetry Validation Example:NYC Cat/Del

Validation of the Catskill/Delaware UV UnitGeneral Outline of Scope of Work• Objectives• Develop appropriate dose-control algorithm• Determine credited log inactivation for Cryptosporidium• Confirm QA for sensors and dose-response results• Confirm headloss and power consumption

RED calc Algorithm1Aef g hiRED 10(Sobs)(Q)(N)() (UVS )254jWhere:RED cal= calculated RED (mJ/cm 2 )S = average observed intensity among all duty sensors, mW/cm 2 ;Q = flow rate, gpm;N = number of lamp modules or rows, unitless;A 254= water abs at 254 nm, (Calculated as -Log(UVT 254/100)), cm -1 ;UVS = avg UV sensitivity of challenge organism, mJ/cm 2 /Logreduction;e, f, g, h, i, j = equation parameters.

Calculated RED (mJ/cm 2 )Comparison of Observed and Calculated RED70.060.050.0Validation Factor becomes afunction of the scatter of theexperimental data40.030.020.010.00.00.0 10.0 20.0 30.0 40.0 50.0 60.0 70.0Observed RED (mJ/cm 2 )

Calculated RED, RED calc (mJ/cm 2 )Performance Curves based on RED AlgorithmUVT 95%, P1 and P2 Power Levels6055504-Log (MS2)P1, MS2 Basis(T1) 95% UVT,P2(T1) 95% UVT,P1(MS2) 95% UVT, P2(MS2) 95%UVT, P1454035302520153-Log (MS2)2.5-Log (MS2)2-Log (MS2)2.5-Log (T1)P2, MS2 BasisP2, T1 Basis10502-Log (T1)Cryptosporidium reductionsbased on cited surrogate0 10 20 30 40 50 60 70 80 90 100Flow Rate (gpm)P1, T1 Basis

UV Validation and ResearchCenter of New YorkA TEST FACILITY DESIGNED TO ACCOMMODATE OFF-SITE FULL-SCALE UV REACTOR VALIDATION ANDRESEARCH• Conceived, Designed and Operated by HDR|HydroQual• Established in 2003, with delivery capacity of up to15,000 gpm (21.6 MGD)• Expanded in 2004 to deliver up to 45,000 gpm (64.8MGD) for the NYC validation

Partners• NYSERDA: Established facility and support• NYCDEP: Supported expansion for testing very largesystems• Water Research Foundation: Partnership withNYSERDA for R&D projects• Gloversville-Johnstown Joint Wastewater TreatmentFacility – Host Facility• Johnstown Water Department• UV Equipment Manufacturers

Participating Manufacturers• Trojan Technologies Inc. (2003)• ITT/Wedeco (2003)• Severn Trent (2003)• Ozonia North America (Degremont Technologies)(2004)• Atlantium Ltd. (2006)• atg UV Technologies (ETS) (2006)• Siemens Water Technologies Corp. (2007)• Toshiba (2011)• LIT Europe (2012)• Fujian EnTech (2012)

UV Validation Center2003 through 2011• Located in Johnstown, NY, operated by HDR|HydroQual• 75 Reactors/Reactor Configurations• 38 MP, 37 LP/LPHO• 60 Pressure, 14 Open-Channel, 1 Alternate Drive (MW)• Applications• 44 DW; 13 reuse; 6 Secondary; 12 Spray Parks• Site-Specific: Seattle, Houston, Thornton/Columbine, Newark (OH),Vancouver, Melbourne, New York City (Cat/Del and Croton) Toronto Metro• Surrogates• T1, T7, Qb, MS2 Coliphage• Dyed Microspheres• Aspergillus brasiliensis spores• Adenovirus-2• B. pumilus spores

Gloversville-Johnstown Joint WastewaterTreatment FacilityUV Center

UV Center Testing Facility

Pump Galley

UV Center(Injection Ports and HEV In-Line Mixer)

UV Center(GAC Treatment and Source Water Tank)

Seattle Cedar WTP UV Reactor Validation

Seattle – Cedar Swift24 Installation

NYC Cat/Del Facility – Reactor Validation

Trojan UVTorrent LPHO SystemsMelbourne (Reuse)Vancouver (Drinking Water)

WEDECO BX Reactors (2004)

Atlantium R-200 (2006)

Infilco Degremont Open-Channel Unit

Open Channel – Vertical and HorizontalConfigurations

Trojan UVSwift30 Installation

atg UV Technologies Units

Thank You!Karl ScheibleChengyue ShenHDR|HydroQual1200 MacArthur BoulevardMahwah, NJ 07430karl.scheible@hdrinc.comchengyue.shen@hdrinc.com201-529-5151