Water Environment Federation and Arizona Waters Student Design Competition Naif Alkahtani, Ahmad Almohammedsaleh, Brittany Riser, Juris Tan, Kyle Telesco 1 Figure 1: WEF Logo [1] Figure 2: AZ Water Logo [2] CENE - 486C April 16, 2021
Water Environment Federation and Arizona Waters Student Design
Competition
Naif Alkahtani, Ahmad Almohammedsaleh, Brittany Riser, Juris Tan, Kyle Telesco
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Figure 1: WEF Logo [1]
Figure 2: AZ Water Logo [2]
CENE - 486CApril 16, 2021
Project Description
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● Purpose: To design a new water treatment plant, maintain TOC level below 2.0-mg/l in the finished water
● Client: AZ Water & WEF● Location: North Water
Treatment Plant (NWTP) ● Stakeholders: AZ Water,
WEF, NAU, and the City of Gilbert
Figure 3: Project Location [3]
Objectives● Lower the TOC levels less
than 2 mg/L ● Reduce chemical usage
Constraints ● Meet water regulations from
○ Environmental Protection Agency (EPA)
○ Arizona Department of Environmental Quality (ADEQ)
○ Maricopa County Environmental Services Department (MCESD)
● Meet expected demand to treat 70MGD by 2050.
Current Layout
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Figure 4: Existing Site Layout [4] Figure 5: Provided Source Water Characteristics [4]
* The build out population was used because of its closeness to the 2050 population** Daily Demand Factors were carried through from present WTP productions
Demand Calculations
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Build Out Population: The maximum population for an area
Table 1: Total Production
Design production based on population estimates
Even years & even productions
Demand Calculations - Phasing
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Table 2: Production Timeline
Lifecycle CostsCost estimation formulas
O&MCost estimation formulas
Social & Environmental FactorsAvailable literatureProcess efficiency improvements
Staffing LevelsAvailable literaturePortion of O&M from Staffing
Process Efficiency ImprovementsProcess Dependent
Feasibility/ConstructabilityComplexity of designResistance to dust storms/heatAlternative footprint
WeightingTreatment Process Dependent
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Matrix Criteria
Preliminary Treatment
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Screening
● Bar screen considered enough for preliminary treatment
Figure 6 : RakeFlex Bar Screen [11]
Primary Treatment - Decision Matrices
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Table 3: Primary Clarifier Decision Matrices
Primary Treatment - Design
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Rectangular clarifier
Dimensions of Clarifier 13.3m wide, 4.3m depth, 37.3m long
Phase 0(2021)45 MGD
1 Rectangular TankSurface area : 496m2
Phase 1 (2030)60 MGD
Adding 1 Tank (Total 2 rectangular clarifiers) Total Surface area: 992m2
Equation 1: Stokes Equation for Laminar Flow
Table 4: Rectangular Clarifier Design
Figure 7: Rectangular Clarifier [5]
Disinfection - Decision Matrices
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Table 5: Disinfection Decision Matrices
Disinfection (Ozone) - Design
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Table 6: Ozone Design
Figure 8: Ozonia CFV-30 Generator [6]
Figure 9: Diagram of Over-Under Contact Chamber [5]
Disinfection (UV) - Design
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Figure 10: TrojanUV Signa Diagram [7]
Figure 11: TrojanUV Signa Photo [7]
Table 7: UV Design
Secondary Treatment - Decision Matrices
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Table 8: Secondary Clarifier Decision Matrices
Secondary Treatment - Design
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Figure 12: Circular Clarifier [5]
Equation 1 : Stokes Equation for Laminar Flow
Table 9 : Secondary Clarifier Design Phasing Information Table 10: Recommended Clarifier Tank Depths [5]
Filtration - Decision Matrices
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Table 11: Filtration Decision Matrices
Filtration- Design
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Table 12: Filtration Design
Figure 13: Veolia FiltraFlo TGV Media View [8]
Solid Treatment
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Table 13: Solids Decision Matrices
Figure 14: Belt Filter Press Diagram [9]
18Figure 15: System Curve
Figure 16 : Centrifugal Pump [10]
Hydraulics
Table 14:Pump Information
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Bar Screen OzonationSecondary
SedimentationPrimary
Sedimentation
UV/Chlorine Filtration
Solids
Final Design Summary - Plant Flow Chart
Distribution
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Final Design Summary - Treatment PhasingTable 15: Design Summary
1 Calculating interest rate2 Initial year values3 Converted to present day money4 Grand Total
Cost Analysis - Example Calculation
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1
2
3
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Principal & O&M Yearly Cost(Simple interest)
O&M Total Cost(Uniform Series)
Equation 2 : Simple Interest
Equation 3 : Uniform Series
Table 16 : Example Cost Analysis Table
Cost Analysis - Totals
By Process
By Phase
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Table 18: Cost by Process
Table 17: Cost by Phase
Impacts
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Table 19: Impacts
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[1] Water Environment Federation - WEF Home, “WEF Home.” [Online]. Available: https://www.wef.org/. [2] “AZ Water Association.” [Online]. Available: https://www.azwater.org/. [3] "Map of US," [Online]. Available: https://www.mapofus.org/arizona/.[4] WEF, AZ Water Student Design Competition 2021, Gilbert: WEF, 2021.[5] M. L. Davis, Water and Wastewater Engineering Design Principles and Practice, McGraw-Hill. [6] SUEZ Water Technologies and Solutions, [Online]. Available: https://www.suezwatertechnologies.com/products/disinfection-oxidation/ozonia- dome-diffuser.[7] TrojanUV Disinfection Technologies, [Online]. Available: https://www.resources.trojanuv.com/wp-content/uploads/2020/12/TrojanUVSigna-Brochure.pdf.[8] "Veolia Water Technologies," [Online]. Available: https://www.veoliawatertechnologies.com/asia/en/solutions/products/filtraflo- tgv. [9] “Belt filter press,” Binfirst, 24-Dec-2019. [Online]. Available: https://www.binfirst.com/products/belt-filter-press/. [Accessed: 09-Mar-2021]. [10] 2021.http://www.gouldspumps.com/ittgp/medialibrary/goulds/website/ Literature/Pump%20Selection%20Guide/Goulds_Rev_PSG.pdf.[11] Duperon, “The Duperon FlexRake”, Duperon Adaptive Technology, 2019, Saginaw, Missouri.
References
Questions?
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