Purification of urban and industrial wastewater
CLEAN WATER AND SANITATION
Ensure access to water and sanitation for all
Over 844 million people in the world live without access to a basic drinking water service, and 2.3 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.
Take urgent action to combat climate change and its impacts
The generation and use of energy accounts for 74 % 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.
ACCIONA was commissioned to design and build the Lugo WWTP. The plant has a water line and a sludge line.
Additionally, odour treatment has been provided and the facility has been equipped with a network of water services, airing network and with all the auxiliary equipment for the correct operation of the same (laboratory, workshop, maintenance equipment, etc).
The Lugo WWTP has the capacity to treat the water of a population of 200,000 inhabitants. After a series of treatments and processes, it is returned to the receiving waterway with all the guarantees of not altering the ecosystem and contributing to the improvement of living conditions in the aquatic environment of the river Miño.
The valuable natural enclave in which the Lugo treatment plant is located has led to the drawing up of an environmental protection plan to eliminate any possible negative effects that the construction of these facilities might have on the privileged environment in which they are located, while at the same time preserving their integration into the landscape.
- Client: Ministry of the Environment. Confederación Hidrográfica del Norte.
- Location: Lugo (Galicia). Spain.
- Capacity: 76,500 m3/day.
- Population equivalent: 200,000 inhabitants.
Design and construction of WWTP in Lugo. The facility is composed of a water line and a sludge line.
The water line includes:
- General bypass for maximum flow.
- Two prefilter wells with screens.
- Two channels equipped with rotating and disintegrating sifters.
- Two pumping wells for the elevation of raw water.
- Four discharge canals.
- Four desanding-deoiling canals.
- Six primary decanters.
- Measurement and regulation of the flow into the biological treatment stage.
- Biological treatment in four lines.
- Recirculation of sludge.
The sludge line is made up of:
- Primary sludge purge.
- Excess sludge purge.
- Sludge thickening process.
- Excess sludge thickening.
- Anaerobic digestion.
- Storage of digested sludge.
- Dehydration and thermal drying
The environment plays an important role in all areas of the construction of the new plant by applying the following measures:
- Confinement of all odour-producing points and installation of deodorisation systems.
- Reduction of noise levels by acoustic insulation of equipment likely to cause nuisance.
- Incorporation of a thermal sludge drying system to ensure that no ash or polluting gases are emitted.
- Reduction of the visual impact of the new facilities by integrating the buildings into the landscape.
- Inclusion of an environmental recovery project that guarantees the appropriate integration of the plant into the landscape: planting of autochthonous species, creation of vegetation screens and minimisation of the visual impact of the projected facilities.