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PH&J ConsultantsProject Report

Engineer Brock HorsleyEngineer Heather JonesEngineer Tyler Puckett

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+I. OVERVIEW

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+Objective:Design Water Treatment FacilityOur firm has conducted the initial design and feasibility study for a water treatment facility that would utilize the Chattahoochee River in supplying the city of Dothan with drinking water.

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Overview of ProcessSurface Water Treatment

+ Project Schedule

Weekly Tasks for PH&J Consultants

PH&J Consultants Schedule:WEEK: AGENDA:

#1 12-Jan-14 Analysis Job and Acceptance Memo#2 19-Jan-14 Reference Research#3 26-Jan-14 Research Jobsite & Organize Approach

#4 2-Feb-14Intake Analysis, Recharge Rate, Expected Growth, Average Life,

Pipes, & TOPO#5 9-Feb-14 Plant Layout, Design Basis, & Develop Assumptions#6 16-Feb-14 Chemical Reactions & Mass Balanaces#7 23-Feb-14 Check Progress, Calculations, Assumptions, & Design#8 2-Mar-14 Innovation#9 9-Mar-14 Cost Analysis

#10 16-Mar-14 Plant Drawing#11 23-Mar-14 Check Calculations, Assumptions, & Design#12 30-Mar-14 Develop Conclusion & Recommendations#13 6-Apr-14 Develop References & Appendies#14 13-Apr-14 Complete Project Folder#15 20-Apr-14 Check All Work & Submit

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+II. Location

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Site of Facility- Total Size: 12 acres

- Within City Limits

- Time to furthest serviceable area:

- 55min @ flow of 5ft/s

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+

Intake to Facility:

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+III. Plant Study

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Plant Design:

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Flow Rate:Design Life: 25 years (EPA, 2014)

3 Day Peak Selected

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Screens:• Concord Screen Airburst

Assembly D-72 • 2 screens are needed• Equipped with air compressors

that periodically clean the screens, eliminating maintenance costs

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Pumps

Pioneer Pump SC108S17

Specifications: Max flow 6500gpm Variable speed (7 gear) Can handle up to 3.5” solids Operates at 80% power

efficiency

- 4 pumps needed

While the peak flow rate in 2040 is projected to be 35 MGD, the rate for 2015 is projected to be as low as 16 MGD (Polyengineering, 2012).

14+Pipes:Transfer Piping• Ductile Iron Pipe • Expected Life: 100 years • 2 pipe lines are needed• 36 in pipe diameter• Velocity: 3.9 ft/s • Length: 81,000 ft per pipe line

• 0.1 ft of headloss per 100 ft of pipe: 89 ft per pipeline

Yard Piping• Accounts for 10% of total cost• High-density polyethylene material will be used• Corrosion resistant • Commonly used for water transmission • Expected Life: 50 years • Color coding for water treatment plants set by Ten States

Standards

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Coagulant:

Aluminum Sulfate, Al2(SO4)3 easily accessible cost effective

Dosage: 20 mg/L 5,843 lb/day $0.07 / lb Year’s supply of Alum, 213,850 lb,

would cost $145,500 Inject by: Dry Alum Feeder

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Rapid Mix:

Detention Time: 45 seconds Needed Volume: 2500 ft3

#tanks = 10 (5 per train)

Vtank = 250 ft3

Velocity Gradient: 900 fps/ft to minimize detention

time

+Flocculation:Detention Time: 30 minutesVolume Needed: 49,000 ft3

• Depth: 16 ft• Width: 32 ft• Length: 96 ft

Three chambers in each tank• 1st: G= 80 s-1 • 2nd: G = 50 s-1 • 3rd: G = 20 s-1

Napier Reid Flocculator • Expected life: 10 years

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+

Sedimentation:

Depth: 15 ftWidth: 100 ftLength: 260 ft• Velocity: 0.018 ft/s• Detention Time: 4

hours

Sludge Removal: 52,000 gal of sludge/dayCosts:$4.80 per 1000 gallons & an additional $240 per 50,000 gallons Totaling: $490/day

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Filtration: Granular Rapid FiltrationArea per filter bed: 450ft2

99% removal

Detention Time: 7.5 hrs

Backwash Cycle: 15 min

Filter-to-waste: 10 min

Total Cycle: 8 hours

Recommend using 4 filters

20+ Disinfection

Ozonation• Best at removal of bacteria, viruses, etc. when

compared to chlorine and UV- No THMs- Only byproduct is bromate

- Only a problem in areas with high concentrations of bromine- Delivery system system: LOX- Recommended Initial Concentrations:

- Use 1.5 mg/L for effluent 0.5 mg/L- Daily LOX: 470 gal / day

- 1 Horizontal tank for Storage: 10,000 gal- Weekly use: 3300 gal LOX- Storage for 3 weeks

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Disinfectant continued:

Contact Chamber Design:

Volume Required: 243000 gal ( 3250 cf)

For HDT of 10 min

Height: 20 ft

Floor: 13 ft x 13 ft

10 chambers

Total volume: 3380 cf

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Disinfectant continued:

Ozone Generator:

Produces up to 1320 lb ozone / day

Dimensions:- Depth: 7.38 ft- Width: 6.23 ft- Height: 7.08 ft

Floor Space: 46 sf

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Disinfectant continued:- Residual Disinfectant:

- Ozone does not leave a residual

Needed for microbial growth in pipes

Suggested: 0.01 mg/L residual disinfectant

Chlorine Gas0.5 mg/L initial concentration

Need 150 lb chlorine gas / day

<< EPA maximum residual goal of 4 mg/L- Three week supply can be stored in 21 tanks

+FluoridationSodium fluorosilicate:• Easy to store• Safer than alternatives

• fluorosilicic acidEPA MCL: 4mg/LEPA secondary MCL: 2mg/L

For areas with high naturally-occurring fluoride

Make 2mg/L target value• 980 lb fluorosilicate / day

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Clear Well:Storage: 25% of Daily flow 9 MGDCST Industries offers construction of ANSI and AWWA approved clearwell storage tanks

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+

Plant Design:

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+IV. INNOVATION

+SOLAR PANELS:

Monthly Power used by pumps: 382,500 kWhMonthly Power cost: $5640

Monthly Power supplied by 1 SolarWorld Panel unit: 190 kWh

Number of Units to combat pump power consumption: 3478 units

One-time cost of panels: $272/unit $815,900

Time to payoff: 12 years25 year savings: $815,900

Total acreage required: 0.85 acres << 12acres

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+V. COSTS

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+

Cost Analysis:

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Overall Bill: $24,699.52Due: May 15th

projected: $29,206.73

Budget Used:85%

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15$0.00

$5,000.00

$10,000.00

$15,000.00

$20,000.00

$25,000.00

$30,000.00

$35,000.00

PH&J Consultants' Cost Progress

Projected CostsActual Costs

Week

Cost

($)

+ANY QUESTIONS

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