The Arana (Saudi Arabia) wastewater treatment plant had a capacity to supply water to a population equivalent of 1,250,000 inhabitants. This capacity was easily surpassed at certain times of the year due to the arrival of pilgrims in the city of Mecca.
The purpose of the Ayesa's project was to develop the basic engineering of the expansion and a solution to enable its rapid implementation, without affecting the operation of the facilities. For this purpose, actions were taken at two levels. On the one hand, the expansion and optimization of the unit processes making up the current treatment line, pumping of raw water and pretreatment, improvement of aeration facilities, and expansion of secondary settling. And on the other hand, the design of a physical-chemical treatment line with lamellar settling, an optimal process for immediate start-up according to needs. In parallel, the sludge line has been extended.
Through these actions, the capacity of the Arana wastewater treatment plant has been increased to supply water to a population equivalent to 2,508,333 inhabitants in mid season and 4,443,333 inhabitants in high season.
The main activities carried out were:
- Collection, analysis and updating of information.
- Basic studies. Analysis and selection of alternatives.
- Documents of the basic project developing the designs and specifications of all the disciplines.