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Water Treatment Plant No. 2 Concentrate Zero Liquid Discharge
August 30, 2011August 30, 2011
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McKim & Creed, Inc.• Tommy Brown, P.E. – Vice President, Project QA/QC
• Craig Wells, P.E. – Principal-in-Charge
• Phil Locke, P.E.– Senior Project Manager
• Ryan Popko, P.E.– Assistant Project Manager, Lead Project Engineer
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Water Treatment Plant No. 2 Overview
• Membrane Softening Water Treatment Plant– Fresh groundwater wells provide the source water– Produces drinking water– Produces concentrate or “reject” stream– Concentrate discharged into Royal Palms
Waterway
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Current Plant Design Capacity• Permitted production is
~6.3 Million Gallons per Day (MGD)
• Source water required is ~7.5 MGD
0
1
2
3
4
5
6
7
8
Capacity
Reject
DrinkingWater
Drinking water ~6.3 MGD
Reject water~1.2 MGD
Concentra
te
Permeate
Groundwater
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Administrative Order
• Administrative Order for Concentrate Disposal– EPA determined current concentrate discharge
permit is not allowed by the Clean Water Act– FDEP notified City that concentrate disposal
permit would not be renewed– Administrative Order requires City to devise an
alternate method of disposing of the concentrate
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Background• City performed an evaluation of concentrate
disposal alternatives based on:– Costs– Regulatory compliance
• Evaluation selected Zero Liquid Discharge for Pilot Study
• Zero Liquid Discharge Pilot Study confirmed treatability, feasibility, and economics as favorable
― Technical feasibility― Environmental benefits
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Zero Liquid Discharge (ZLD) Overview• Treats concentrate stream to remove excess
mineral content• Treated stream blended with finished water
from water plant• Process is integrated into existing water plant;
will operate as one facility• Eliminates concentrate discharge from water
plant
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No Liquid Discharge
ZLD Recovered Water
Concentra
te
Permeate
Groundwater
Drinkin
g wate
r – ~7.5 M
GD
Future Situation
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Project Delivery Method• City selected an Original Equipment
Manufacturer (OEM)– Advertised Request for Qualifications (RFQ)
• Six OEMs responded• Evaluation included technical process and experience
information• City selected three OEMs for further consideration
– Advertised Request for Proposal (RFP)• Evaluation included pricing information
– Selected Doosan Hydro Technology
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Project Delivery Method
• City selected a Design Engineer– Requested technical qualifications (RFQ) from the
three firms under contract to provide utility engineering services• Evaluation utilized qualifications based selection per
state law
– Selected McKim & Creed
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Project Delivery Method
• Future Actions– Design to be performed by McKim & Creed• Design will incorporate the OEM equipment that has
been selected by the City• Technical plans and specifications will be prepared to
include equipment provided by the OEM
– Advertisement for a General Contractor (GC)• Price competition, based on using OEM equipment and
pricing provided to City
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Project CostsTotal Estimated Project Costs $7.3M vs. $7.5M budget• Construction Costs
• $2.15M OEM (quote)• $4.00M General Contractor (still subject to bid environment)• $0.24M Bidding and Engineering Services during Construction (quote)
• Design Costs• $0.58M Engineering (quote)• $0.11M OEM Services (quote)
• Integration Costs• $0.22M Supervisory Control and Data Acquisition System (quote)
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Benefits of Project• Achieves regulatory compliance• Increases water plant design capacity at build-out by
~1.2 MGD• Eliminates discharge permit and associated sampling
costs• Meets the Consumptive Use Permit requirement for
Alternative Water Supply• Design incorporates City’s green initiatives– Water Conservation– Waste Recovery
• Delays costs associated with future expansions
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Project Schedule
• Work Order issued for design: September 2011
• Award construction contract: May 2012• Substantial completion and Administrative
Order compliance: April 2013
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Questions