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Soon green energy boats on the Seine

2021-06-15T06:24:01.692Z


River navigation must also be virtuous in terms of the environment. Two projects using clean gas from anaerobic digestion v


After cars, buses and urban heating networks, green gas is entering the river sector. Two projects, led by GRDF, have just been presented. The first plans to equip 150 boats of the Port Community of Paris with new engines that are much more respectful of the environment. The second, in which the region, Voies navigables de France and Ademe (the environment and energy management agency) are associated, consists of equipping a freight barge with a hybrid biogas / electric engine. in order to dedicate it to the evacuation of urban waste to treatment and recovery centers during its journeys between Paris and Mantes-la-Jolie (Yvelines).

Logic would have wanted the presentation of the project to take place on the banks of the Seine, on the pontoon of a barge or a freight boat.

But it is in the South-Essonne, on the Bioenergie De Dhuilet methanization site that the appointment is given.

"It is quite unusual to talk about boats in the middle of the fields," laughs Olivier Jamey, president of the Port Community of Paris.

We are working on the energy transition of the fleet, a study was carried out to replace the engines of 150 boats.

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"Reduce greenhouse gas emissions by six"

In about two years, the first twelve "green" boats should sail on the Seine. Some will be equipped with hybrid biogas / electric engines and others will be “100% BioNGV”. “Transport by barge is already two to four times less emitting than road transport per tonne transported,” specifies Bertrand de Singly, Director of Customers Territories Île-de-France for GRDF. By re-engineering the boats with biogas, we are going much further by reducing greenhouse gases by six. "

To back up its argument, GRDF is based on studies carried out on two boats.

“Studies show that 100% biogas engines reduce CO2 emissions by 80%, fine particles by 95% and gas from the combustion of fossil fuels by half,” adds Corinne Cacheux of GRDF.

For hybrid engines, CO2 emissions fall by 90% and fine particles such as combustion gases by 98%.

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Read alsoSeine-et-Marne: Sénart will have the first fuel station of the future

To enable this revolution, GRDF is banking on the production of biogas from methanization plants in the Ile-de-France region.

Like the Essonne site on which the presentation is organized, these factories transform organic materials from agricultural production and agrifood by-products by storing them in semi-underground tanks.

In the absence of oxygen, these materials are degraded by bacteria at a temperature of 38 ° C.

It is the methane and carbon dioxide thus created that constitute the biogas used in town gas or new generation engines.

The residue from this transformation, called digestate, is used as a natural fertilizer, thus replacing farmers' chemical fertilizers.

Already eleven stations dedicated to BioNGV along the Seine

Once equipped with their new engines, the boats should be able to refuel easily. To date, 11 stations can already supply the river fleets of the Seine, from the ports of Paris to the Normandy seafront, with NGV / BioNGV. "Today we have 100 BioNGV stations in Île-de-France, including 11 dedicated to river," continues Bertrand de Singly. The annual growth rate is 30%. According to a study by the Parisian urban planning workshop, half of the 400 service stations to come will be able to move towards clean mobility in the decade. "

The cost remains ... Changing the engine of 150 boats is expensive. “This represents around one hundred million euros,” underlines the president of the Paris Port Community. But thanks to this innovation, the operating cost will drop. We are also going to receive aid from the European Union, the region, the State, the Ademe… It will take at least ten years to equip the 150 boats. "

Source: leparis

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