Bora-Bora, an island in French Polynesia, has been facing increasing pressure in terms of drinking water consumption and wastewater discharge for three decades. This is explained by:
In 1990, the municipality launched a major project for sustainable, durable water management. Through public-private partnerships, the island wished to create a drinking water service, followed by a sewerage system and water treatment, and lastly recycling of treated wastewater.
What is the SUEZ road map? Manage all the services linked to drinking water and wastewater, with a concern for environmental excellence to preserve the stunning natural paradise that is Bora Bora.
As part of two water management contracts, the Polynésienne des Eaux subsidiary of SUEZ undertakes to:
Preserve the natural fresh water supply thanks to desalination
The production of drinking water is supplied by 16 boreholes around the island. To preserve the fresh water of the watertable, the Polynésienne des Eaux built three additional desalination plants in 2001, 2006 and 2007. Important means have also been deployed to optimise the performance of the distribution networks and thus avoid any wastage.
Recycling treated water in a circular economy approach
Water filtered by ultrafiltration membrane technology is in high demand for watering parks and gardens, fire-fighting and preparing concrete. This avoids using drinking water for these purposes. La Polynésienne des Eaux also recycles the sludge produced by the wastewater treatment plants thanks to rhizocomposting. The compost obtained is entirely used for fertilising the soil.
For 25 years, Bora Bora has been implementing a development policy focused on technological innovation enabling it to offer its population and tourists from all over the world quality water in a healthy environment in line with sustainable development. For the last 15 years, these efforts have been rewarded by the award of the prestigious “Pavillon Bleu”, a label recognising excellent environmental quality and sustainable tourism development.
The distribution performance standards have significantly increased at Bora Bora thanks to remote management, a segmentation of the network and systematic leak detection (130,000 m3 / year saved thanks to the measures set up (leak detection, etc.).
The high quality of the water recycling by ultrafiltration membranes has led to a rise in demand for it from 60 m3/day to 300 m3/day:
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