2. The challenge
Canal de Isabel II began an ambitious plan to reuse the water of Madrid, with an investment of over 200 million euros and which affected more than 30 wastewater treatment plants, in these plants two separate tertiary treatment would be built for the regeneration of part of its effluents. The water will help to water parks and to clean the streets of more than 50 municipalities of the 179 available in the region. In addition, the water will serve to irrigate more than 20 golf courses, and some industries will benefit also from this resource because the price of reclaimed water would be less than the one destined for human consumption.
The ultimate goal, which was to put on the market around 40 hm3 annually of reclaimed water, will help to reduce the increasing consumption of water from our scarce resources and thus increase the security of supply of a city as important as Madrid.
Molecor took part in this project and here it is detailed a small part of the project, the one that implies the city of Coslada, in Madrid. This city has a population of nearly 90,000 inhabitants and an area of 12 km2.
The goal of the project for this city was to substitute the ductile iron water network by a PVC-O one that could be able to provide a maximum flow of 147.5 l/s solving, at the same time, gravity and pumping deficiencies. Regarding gravity the PVC-O conveyance system should provide a proper service to 21 consumption points distributed in 20 different sections in four axes.
On the other part, related to the pumping conveyance system, 25 consumption points were implied, distributed in 31 different sections in eight axes.
With this substitution of Ductile Iron for PVC-O the pipeline leakages and water losses had to be solved which would lead to a relevant decrease of the water cost.
Gravity conveyance system:
- 21 water consumption points
- Max. flow 147,5 l/s
- 20 sections in 4 axes
- 7.665 m DN110-200-250-315-400
Pumping conveyance system:
- 25 water consumption points
- Max. flow 121,5 l/s
- 31 sections in 8 axes
- 7.612 m DN110-160-200-250-315-400