The Siaap and Suez introduce Biognval, an unprecedented solution to convert wastewater into liquid biofuel

At the Valenton plant (Val-de-Marne), Belaïde Bedreddine, the President of the inter-departmental syndicate for the sanitation of the Paris conurbation (SIAAP) with the administrators and Jean-Louis Chaussade, CEO of SUEZ, presented BioGNVAL, the innovation that transforms a part of the wastewater in the Paris region into liquid biofuel.

Valenton’s plant is one of the largest water treatments plants in Europe, dealing with the wastewater produced every day by almost 9 million inhabitants of the Paris region.

The BioGNVAL industrial demonstrator is the first of its kind in France to reuse the biogas from the treatment of wastewater as liquid biofuel (bioLNG), a renewable energy that is easy to store and transport.

This innovation is made possible by the cryogenic process developed by Cryo Pur that purifies the biogas by separating its components – methane and CO2 – to produce biomethane, which is then transformed into liquid biofuel.

With the support of the “Investissements for the Future” Programme organised by the French Environment and Energy Management Agency (ADEME), the SIAPP and SUEZ, which operates the Valenton plant (800,000 m3 of water/day), launched the project in February 2013 to demonstrate the technical and economic feasibility of producing liquid methane gas from biogas, with a view to developing the process on an international scale.

The BioGNVAL project has now demonstrated that we can produce from our wastewater a clean fuel that does not emit any fine particles, make 50% less noise and cuts CO2 emissions by 90% compared with a diesel engine. The BioGNVAL industrial demonstrator can treat almost 120 Nm3/h of biogas, to produce one tonne/day of bioLNG, or two full tanks for a heavy good vehicle. Tests have shown that the wastewater produced by 100,000 inhabitants could produce enough bioLNG to fuel 20 buses or 20 trucks.

BioLNG has numerous applications, because the liquefaction process reduces its volume by a factor of 600, making it easy to store and transport. It can be used to transport people and goods over long distances (HGVs, vans and buses) or can be supplied to stations services or industrials, who then use it instead of fossil fuels. It represents an alternative solution for the reuse of the biogas produced in purification stations, when it cannot be easily re-injected back into the natural gas distribution network, particularly for distance-related reasons.

The European directive 2009/28/CE set the target of incorporating 10% of renewable energies in the transport sector by 2020. The production and distribution of bioLNG as an alternative to fossil fuels therefore continues the drive to develop renewable energies that is encouraged by French, European and global authorities.

The SIAAP is actively encouraging the development of this biofuel. It also offers some major advantages to the regions: it is both a lever to achieve regional energy independence and a solution to combat climate change.


Source: SUEZ