The Pearl Qatar is an iconic and innovative mixed-use urban development in Doha, Qatar. The Pearl is owned and developed by United Development Company (UDC), a Qatari shareholding company with a mission to identify and invest in long-term projects contributing to Qatar’s growth. The island spans over four million square-meters of land that was meticulously developed into a masterpiece of private and modern living. The Pearl offers residents and visitors a complete lifestyle experience that includes residential units built to the highest international standards, a fantastic choice of retail, dining and hospitality outlets and a host of other amenities and facilities.
The Pearl’s first phase and gateway to the island also houses the world’s longest waterfront luxury retail walkway, the 3.5km marina-front pedestrian boardwalk called ‘La Croisette’. UDC awarded Metito the project to construct a Seawater Reverse Osmosis (SWRO) desalination plant to supply water for potable purposes, district cooling and irrigation with a flow capacity of 40,000 m3/day.
Due to the reclaimed nature of the land and its prime value, it was not permitted to construct a plant with conventional horizontal layout and this constituted a major challenge. To overcome this challenge, Metito adopted an effective, sustainable and practical solution; building a multi story structure comprising 4 levels:
- Basement floor: This stands at below seawater level where the filter feed pumps, pressure filters, product water pumps, irrigation transfer pumps, filter backwash pumps and air scouring blowers, are all housed
- Ground floor: Home to the cartridge filters, chemical conditioning systems, and carbon dioxide storage and injection system
- Mezzanine Floor: Houses the MCCs and LV systems
- First floor: This houses the high pressure pumps for 1st and 2nd passes, energy recovery turbochargers, 1st and 2nd pass membrane racks, control systems and 3.3 KV HV MCC for the huge 1st pass high pressure pumps
Another challenge was ensuring the treated water permeate salinity is less than 400ppm, in compliance with the local water quality standards. To overcome this challenge, Metito utilised the 2 pass RO system.