Emirate of Ajman – Towards 100% wastewater reuse
Posted on April, 3rd 2018.
The Ajman Sewerage treatment plant recycles 50% of the city’s wastewater for reuse and targets to reuse 100% in order to avoid discharging TSE (Treated Sewage Effluent) in the sea.
100 million of liters of wastewater produced daily by homes, businesses and industries are collected through the sewage system.
In the United Arab Emirates (UAE), the risk of widespread reduction of desalination investment and environmental stress is ever present. With mass immigration, the population continues to grow – which not only increases the need for drinking water but also the demand for water for agriculture and industry.
The UAE’s water consumption is estimated to be about 390 liters per day per capita compared to 250 liters in France!
The result is that water table levels are dropping rapidly. The Emirates are therefore looking for long term solutions to preserve resources and emerge from the constant threat of shortage – like the solution set up with the support of Veolia in the city of Ajman, named after one of the seven emirates in the United Arab Emirates federation.
As part of the Moalajah joint venture, Veolia signed a 27-year contract in 2006 to manage the city’s wastewater services including the entire sewerage system – a contract unique in the Middle East. The system developed includes a 400-kilometer sewer system, 22 pumping stations and the “Ajman Sewerage” treatment plant. The goal is to meet demand for water by providing high-quality recycled water and reuse 100% of the water that arrives to the site, to avoid discharging anything in the natural environment.
The sewage network collects 100 million liters of effluent from homes, businesses and industry every day. The effluent collected undergoes treatment: the suspended solids are removed, biological treatment eliminates pollution, and finally a tertiary treatment process removes bacteria. Once recycled, the water is reused for irrigation in resorts complexes, golf courses and fountains, or for industrials.
This local circular economy loop helps Ajman to preserve much of its water resources. The process also avoids the annual emission of 6,000 tons of CO2.
The solution developed in the city of Ajman will be deployed throughout the emirate by 2020 with the installation of a 600-kilometer sewerage network and 10 additional pumping stations.
New contracts have also been signed in three other emirates: Ras Al Khaimah and Dubai in 2012. Wastewater recycling could well become the gold standard for preserving the Gulf’s precious blue resource!
Self-sustainable in energy
Beside its objectives in wastewater reuse, another project is also being developed to reuse the gas generated by sludge digestion and by the wastewater treatment process and convert it into energy used on site, in order to reduce the use of fossil fuels.
To be even more self-sustainable in terms of energy and the generation of green & clean energy, a feasibility study is on-going to install solar panels on site.
After collecting, transporting wastewater through its network and treating it thanks to a state-of-the-art treatment plant, Ajman Sewerage makes available high quality recycled water for re-use. Currently, 50% of this recycled water is re-used to irrigate various areas in the city of Ajman or is treated further to be utilized for commercial and industrial applications. Ajman Sewerage strives to make recycled water the norm now and for the generations to come, in view of environmental sustainability and the preservation of strategic water resources . من خلال جمع و نقل المياه العادمة إلى محطة المعالجة من خلال شبكتها, و معالجتها بفضل محطة معالجة متطورة، توفر شركة عجمان للصرف الصحي مياها معالجة ذات جودة عالية لإعادة إستخدامها. في الوقت الحالي, يتم إعادة إستخدام نصف المياه المعالجة في ري مناطق مختلفة في مدينة عجمان أو تعالج هذه المياه أكثر لإستخدامات تجارية أو صناعية. تطمح عجمان للصرف الصحي جعل إعادة إستخدام المياه المعالجة هي القاعدة فالآن وللأجيال القادمة، في ضوء الاستدامة البيئية والمحافظة على الموارد المائية الاستراتيجية. #ajman #ajmansewerage #ecoajman #عجمان #عجمان_للصرف_الصحي #بيئة_عجمان
Credit : © Photothèque Veolia-Stéphane Lavoue