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LIST
OF CONTENTS
Introduction
Process Description
Typical
Contactor
Design
Criteria
Photos, Plans & Specs
Treatment
Performance
Operational
Skills
Automation
Potential
Advantages
Limitations
& Concerns
Pilot
Plant Objectives
Costs
References
Contacts & Facilities
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PHOTOS, PLANS AND SPECIFICATIONS
- CONTINUED
iv. Photos of Limestone Contactor in the Canary
Islands, Spain
The following photos show examples of the limestone contactors
designed by the Canary Islands Water Center. It is used to
treat desalinated water from the reverse osmosis plants in
the Canary Islands. The salinity and CO2
content of the desalinated water vary from one reverse osmosis
plant to another but the typical characteristics are pH =
5.6 to 6, CO2 = 30-45 ppm and EC=600-1500
µS/cm (Hernández, 2003). The limestone contactors
use 98% calcium carbonate with media size of 3 mm (Hernández,
2003). Due to variation in desalinated water quality from
plant to plant, recommendations are to carry out pilot test
to define accurate design parameters. The contactor may be
easily added to an existing plant or custom-built for each
installation and type of water (Centro Canario del Agua, 2003).
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