Boosting circular economy in public transport

Fossil fuels, a thing of the past

The transport sector demands around 30% of total primary energy consumption in Europe, but only less than 10% of the fuels used for transport are renewable. In this context, the European Union aims to achieve over 30% of energy consumption for transport from renewable sources by 2030.

Boosting circular economy in public transport

In this sense, NIMBUS will foster a more sustainable transport through circular economy. To do this, the project will use biomethane, a renewable and unlimited fuel generated from sewage sludge and the surplus of renewable energies, as fuel for one bus in Barcelona.


A step towards carbon neutrality

As a result, NIMBUS will reduce the public bus’ carbon footprint by over 85% by using biomethane as fuel. Besides, the amount of energy obtained from biogas due to the storage of renewables through biological methanation will be almost a 70% more than the current use of biogas in the Baix Llobregat WWTP.

Circular economy for a more sustainable transport

The NIMBUS project is committed to green transport with biomethane as a sustainable fuel to replace fossil fuels in public transport in the city of Barcelona.

Turning Wastewater Treatment Plants into Ecofactories

The NIMBUS project transforms the current Llobregat WWTP into an ecofactory, a facility that generates valuable resources. NIMBUS is committed to the circular economy by revaluing the waste generated in the treatment plant to produce biogas.

Power-to-gas: Transforming renewable energy surplus into Hydrogen

NIMBUS uses Power-to-Gas technologies to transform surplus renewable energy into hydrogen gas for easy storage.

Using biomethane to reduce public transport’s carbon footprint

By combining the hydrogen generated with Power-To-Gas technologies and the biogas produced in the ecofactory, biomethane, high-quality renewable gas fuel will be generated. Biomethane can be injected into the natural gas network or used as a fuel for transportation.