Use of resources

Efficiency, in water consumption.

The sustainable use of resources is the fundamental principle of ACCIONA Agua’s environmental policy. It is present in the company’s strategic approach and constitutes an aspect of the business model that clearly differentiates it from its competitors.

Thanks to the implementation of the Environmental Meter tool, the levels of consumption, of the generation of residuals and waste are measured with precision in each centre. These indicators are referred to by the centre management models and used in the decision making processes of the company.

Water Managed by ACCIONA Agua

The diversity of sources and the difficulties of measuring it are the main challenges when it comes to improving the management of water consumption.

 20072006
 unitconsumptionefficiencyconsumption efficiency
Sulphuric acid l 462,029 1.68 754,536 3.33
Ferric sulphate kg 454,707 1.65 473,490 2.09
Sodium hydroxide l 128,971 0.47 92,142 0.41
Sodium bisulphite l 176,373 0.64 480,176 2.12
Sodium hypochlorite kg 938,777 3.41 2,411.803 10.65
Polyelectrolytes kg 256,660 0.93 276,390 1.22
Calcium hydroxide kg 2,096,446 7.62 1,358,583 6.00
Carbon dioxide kg 707,575 2.57 1,049.962 4.64
Phosphoric acid l 6,744 0.02 12,750 0.06
Aluminium sulphate kg 749,728 2.73 20,000 0.09
Scale inhibitors kg 42,228 0.15    
Activated carbon kg 30,438 0.11    
  Hm3
 20072006
Desalinated water 52.86 51.7
Treated wastewater 203.85 166.6
Drinking water produced 49.73 43.6

Note: ACCIONA Agua has made progress in collecting and using rainwater and in using tertiary-treated water. Examples of best practices include activities at the Cehegin, Ceutí and Lorqui (Spain) wastewater treatment plants.

Non-hazardous waste unit20072006
Metals t 48 215
Earth m3 22,529 15,674
Pre-Treatment residues t 5,890 3,395
Sand from de-sanding processes t 5,180 1,894
Dehydrated sludge t 117,627 87,763
Timber t 48 2
Rubble t 6,764  
Grease from de-greasing processes t 3,572 334

Note: The total volume of waste generated is directly related to the type of activity: if there are more activities involving construction, the volume of earth (resulting from low – pressure water distribution) is higher but this does not necessary mean worse enviromental behaviour. The increase in the total volume of waste is directy related to the increase in production at ACCIONA Agua.

Hazardous waste20072006
Oil (kg) 10,916 6,944
Laboratory chemicals (kg) 771 372
Contaminated packaging (kg) 2,652 1,351
Absorbents and rags (kg) 947 492
Fluorescent tubes (kg) 406 145
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