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Recycling 100% of the wastewater in Doha, Qatar, to support its international development

Water requirements in Doha are continously growing and the capital has very low rainfall levels. From 2005, the Qatar National Public Works Authority (Ashghal), signed three successive contracts with SUEZ to cope with the demographic pressure coupled with hydric stress. The challenge: satisfy water needs and protect the resource. With this aim in mind, SUEZ set up future-proof infrastructures and innovative treatments to achieve up to 100% wastewater recycling.

The mission

Support Doha's demographic and international growth while securing its water resources

Water resource management has become a critical issue for Qatar. Tucked between the sea and the desert, this small kingdom is subject to high demographic and climate stress with scarce, minimal rainfall. The city of Doha in particular, which houses 80% of the country's population, must meet ever-increasing water requirements. 

Starting in 2005 and as part of three successive contracts, the Qatar state public works authority (Ashghal) brought in SUEZ to meet its resource preservation challenges. These missions were in part conducted in partnership with Japanese firm Marubeni Corporation. 

460 litres

Daily quantity of water consumed per inhabitant in Qatar,

650,000

inhabitants served by the Doha West plant under the 2011 contract.

Our solution

Preserve the resource by recycling wastewater

The SUEZ solution? Propose efficient and scalable infrastructures to protect the water resources while meeting the growing needs of the capital. We built a new wastewater treatment and recycling plant on the Doha West site; and extend the facility capacity to meet the needs of Doha.
 
Scalable solutions to increase the water treatment capacity
In 2005, the city of Doha signed an agreement with SUEZ for the design, build and operation of a new wastewater treatment and recycling plant located west of Doha. The new wastewater plant came into operation in March 2010, supplementing the production of the existing plant on the Doha West site. The following year, State authority Ashghal entrusted SUEZ with the extension of the Doha West wastewater plant, as the needs of the population already exceeded the capacity of the plant. The objective: raise daily production from 135,000 to 175,000 m3 using the same technology. The extension was brought online in July 2012, three months ahead of schedule. 
 
Ensure sufficient water supply for the FIFA 2022 world cup infrastructures
In 2015, SUEZ was again assigned to extend the Doha West wastewater treatment and recycling plant by 2017. This time, the intended capacity amounted to 280,000 m3 per day. The same year, the management authority of the Aspire Zone contracted SUEZ to design and build a post-treatment plant. The idea is to reuse a part of the wastewater recycled by the Doha West site for the needs of the 250-hectare sports complex, including the FIFA 2022 world cup stadium. We adjusted the quality of recycled wastewater to the specific requirements of the Aspire Zone and guarantee plant performance in terms of quantity. 
 
Increase the volumes of water available without reducing natural resources
Through advanced technologies, such as ultrafiltration membranes, the Doha West plant can reuse 100% of treated wastewater. The wastewater is reused for agriculture in the desert (55%), gardens (42%), and recharging aquifers (3%).
 
The results
Innovative treatments to preserve water resources in Doha by recycling wastewater, which saves drinking water and recharge of aquifers.

Using this additional treated wastewater of very high quality, containing nutrients, crop growers have produced better yields and lowered their use of artificial fertilisers. 

15,000 m3

Daily production capacity of the reuse plant dedicated to the Aspire Zone. 

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