41,000
Population equivalent
CLEAN WATER AND SANITATION
Ensure access to water and sanitation for all
Over 2,000 million people in the world live without access to a basic drinking water service, and 3,6 billionhave no access to a basic sanitation service, resulting in avoidable deaths, chronic disease, fewer hours of education and low productivity.
ACCIONA has positioned itself as a key player in the water treatment sector. Its innovative management seeks to resolve the challenges with respect to the shortage of water resources.
CLIMATE ACTION
Take urgent action to combat climate change and its impacts
The generation and use of energy accounts for 35 % of total greenhouse gas emissions in the world. This activity is the largest contributor to global warming. Investment in renewable energy, energy efficiency and other low-carbon technologies will continue to be essential to meet the emerging needs of humanity and to minimize their negative impact on the environment.
ACCIONA considers the fight against climate change and its effects to be a strategic priority. The company works to mitigate greenhouse gas emissions in order to contribute to the progress of society and respond to the main challenges of sustainable development in the areas of infrastructure, water and energy, leading the transition to a low-carbon economy.
Among the new features included in the contract is the implementation of a photovoltaic plant that will cover around 30% of the energy consumption of the facilities with renewable energy, as well as the installation of a new centrifugal decanter and an overflow control system equipped with a screening system. In addition, among other efficiency improvements, ACCIONA has included in its bid the implementation of an intelligent system, developed in-house, to control the aeration of the biological process called Biocontrol-Carr®. Its use will result in additional savings in the supply of oxygen to the biological treatment.
General Information
- Project: WWTP Mairena and Viso.
- Entity: EMASESA.
- Location: Mairena and Viso del Alcor, Seville. Spain.
- Design flow: 9,220 m3/day.
- Population: 41,000 inhabitants
Key points - treatment
Pre-treatment:
Large particle screens, sifting, desander, sand classifier, deoiler and influent flow metre
Secondary treatment:
Biological treatment of active sludge with nitrification-denitrification and stabilisation of sludge. O2 input / Mud recirculation / Sedimentation
Mud treatment:
Thickener
Miscellaneous:
Deodorising