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PH&J Consultants
Project Report
Engineer Brock Horsley
Engineer Heather Jones
Engineer Tyler Puckett

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I. OVERVIEW
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Objective:
Design Water Treatment Facility
Our 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 Process
Surface Water Treatment

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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-14
Intake 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).
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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
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Flocculation:
Detention Time: 30 minutes
Volume 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 ft
Width: 100 ft
Length: 260 ft
• Velocity: 0.018 ft/s
• Detention Time: 4 hours
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Sludge Removal:
52,000 gal of sludge/day
Costs:
$4.80 per 1000 gallons & an additional
$240 per 50,000 gallons
Totaling: $490/day

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Filtration: Granular Rapid Filtration
Area 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
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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 Gas
- 0.5 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
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Fluoridation
Sodium fluorosilicate:
• Easy to store
• Safer than alternatives
• fluorosilicic acid
EPA MCL: 4mg/L
EPA 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 MGD
CST Industries offers construction of
ANSI and AWWA approved clearwell
storage tanks

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Plant Design:
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IV. INNOVATION
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SOLAR PANELS:
Monthly Power used by pumps: 382,500
kWh
Monthly 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 years
25 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:
$24,699.52
Due: May 15th
projected:
$29,206.73
Budget Used:
85%
$0.00
$5,000.00
$10,000.00
$15,000.00
$20,000.00
$25,000.00
$30,000.00
$35,000.00
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Cost($)
Week
PH&J Consultants' Cost Progress
Projected Costs
Actual Costs

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ANY QUESTIONS
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