project overview > project details
Phase 1 work on a proposed desalination plant resulted in a recommendations for a land-based seawater desalination facility as follows:
| Capacity & timing: | 10-15 million gallons per day in approximately 2020 |
| Location: | Flagler County |
| Land required: | 25-50 acres |
| Desalting process: | Reverse osmosis (RO) – uses high pressure pumps to force seawater through a semi-permeable membrane to remove salt from seawater. |
| Intake options: | • Screened intake with pipeline • Off-shore infiltration gallery • Radial collector wells |
| Pretreatment options: | • Clarification
• Dissolved air flotation
• Conventional sedimentation
• Actiflo™ • Filtration • Gravity filters
• Pressure filters
• Membrane filtration
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| Discharge options: | • Subsurface dispersion field • Pipeline with dispersion • Deep injection well |
| Transmission system: | Up to 140 miles of 8- to 64-inch piping |
| Estimated cost*: | Initial cost for a 10 mgd facility estimated between $6.74 and $7.44 per 1000 gallons for treated water, including intake and concentrate discharge, net present value. Future expansion would result in costs as low as approximately $4.89 per 1000 gallons.
Cost for transmission system pipelines and pumping is approximately $1.72 per 1000 gallons, net present value. |
| Recommended intake, pretreatment and discharge options will be further evaluated in Phase 2B to determine a recommended plant configuration. Additionally, energy recovery devices will be analyzed in Phase 2B to improve the plant’s efficiency and save operating costs. Options to be evaluated further include energy recovery turbines and pressure exchange arrays. | |
| *Estimated costs are engineer’s opinion of probable construction costs based on a number of assumptions, including intake pipeline length, finished water quality, transmission system length, pipe diameter and so on. The estimated cost includes capital costs, operations and maintenance as well as financing costs. These estimates are expected to be refined as the project is better defined in Phase 2B. | |
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