QUA FEDI Solution for South Coast Steam Power in Puerto Rico

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Project Background

Puerto Rico Electric Power Authority (PREPA) is the owner of South Coast Steam Power Plant located at Guayanilla in the island of Puerto Rico, about 150 KM south of San Juan. This power station is one of PREPA’s oldest units and uses an oil red boiler as part of its generation process.

The plant decided to replace an old, antiquated ion exchange-based demineralization plant with a membrane-based demineralization system. This would avoid chemical regeneration and waste as well as allow the plant to be more environmentally friendly. The membrane process also would allow easier environmental permitting for the client.

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Location: Puerto Rico
FEDI Model: FEDI-2 HF 30X
No. of Streams: 3 x 400 gpm (3 x 91 m3/hr)
No. of Stacks: 45
Silica as SiO2: < 0.02 ppb
Conductivity: < 0.1 mS/cm

QUA Solution

QUA’s Fractional Electrodeionization FEDI-2 HF stacks were chosen for the electrodeionization polishing step of the process due to their capability to handle variable feed conditions with a patented two-stage design. Additionally, the FEDI stacks provided a high-quality, compact solution due to their high flow capacities.