Biofuel for Brittany DMUs

Brittany's initiative to convert its diesel multiple units (DMUs) and bi-mode trains to B100 biofuel represents a significant shift towards sustainable rail operations in France. The project targets a fleet of 30 trains, including 12 four-car AGC bi-mode class B 82500 units from 2008 and 18 X 73500 single cars built in 1999. The first converted AGCs began service on June 13, 2023, operating on the summer-only route from Auray to Quiberon.

The conversion to B100 biofuel, derived from rapeseed oil, is expected to yield a substantial environmental benefit by eliminating approximately 3,775 tonnes of CO2 emissions annually. This aligns with broader European goals for reducing greenhouse gas emissions in the transport sector. However, the project will also lead to an increase in annual operating costs by €580,000, which may impact the financial sustainability of the service.

Modifications to fuelling infrastructure at key locations, including Saint Brieuc, Quimper, Carhaix, and Rennes, were necessary to accommodate the new biofuel. This logistical adjustment highlights the complexities involved in transitioning to alternative fuels within existing rail networks.

France has previously seen the introduction of biofuels in rail operations, with the first trains using biofuel being 15 six-car Régiolis bi-mode units on the Paris - Granville service in Normandy. Brittany's project marks a continuation of this trend, potentially setting a precedent for other regions in France and beyond to follow suit.

As the rail industry increasingly focuses on sustainability, Brittany's conversion project may influence other operators to explore similar initiatives, balancing environmental goals with operational costs.