The NIMBUS project aims to transform the current Baix Llobregat treatment plant into an ecofactory, a facility that generates valuable resources. Its objective is to promote the circular economy between the ecofactory and the city of Barcelona by demonstrating power-to-gas technology based on biological processes for more sustainable transport.
NIMBUS uses power-to-gas technology to transform excess renewable energy into hydrogen gas for easy storage. Two technologies are being investigated for the production of hydrogen, one is the electrolysis of regenerated water and the other is a bioelectrochemical system for obtaining hydrogen from the organic matter of urban wastewater. By combining the hydrogen generated and the biogas produced in the ecofactory, biomethane, a quality renewable fuel in the form of gas, can be generated. To achieve this, biological methanation technology is used to convert the CO2 contained in the biogas to biomethane with sufficient quality to be injected into the natural gas network or used as fuel for transportation.
NIMBUS is a European project co-financed by the LIFE Program with the participation of CETAQUA, Aigües de Barcelona, LABAQUA, UAB and TMB, which aims to promote the circular economy through the generation of biomethane from sewage sludge and power-to technologies. -gas and its use as a sustainable fuel for public transport.
The transport sector demands around 30% of the 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 more than 30% of energy consumption for transport from renewable sources by 2030.
NIMBUS, which has been presented for the first innovation prize at the #RenewableGas Show, will promote more sustainable transport through the circular economy. To do this, the project will use biomethane, a renewable and unlimited fuel generated from sewage sludge and surplus renewable energy, as fuel for a public bus in Barcelona that will travel about 100 km per day.
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