In the fight against climate change, gas, which is currently mainly produced from fossil fuels, must go green. Faced with the emergency, the distribution network manager GRDF has therefore established its own decarbonization plan, choosing to “join the trajectory of the Paris Agreement”, underlines David Colin, Territories Director at GRDF Bretagne.
In the region, the roadmap plans, in particular, to increase the share of green gas injected into the networks from 6% to 30%. At the same time, gas consumption must fall by 30%. According to GRDF forecasts, future green gas will mainly come from methanization (4.6 TWh) and, more marginally, from new pyrogasification and hydrothermal gasification techniques (0.5 TWh).
Around 90 methane digesters connected
In Brittany, the 2030 objective is 10% higher than the national target, mainly due to the dynamism of agricultural methanisation. “We have gone from 0 TWh produced in 2015 to 1 TWh today,” says David Colin. Of the approximately 240 methanisers in operation, 91 are connected to the network. And “five to six” others will be by the end of the year.
Despite these good figures, not everything is rosy. Contested by environmental associations and faced with acceptability issues, Breton methanization has also had to face economic difficulties, leading to a 15% price increase in June 2023. “It created a call for air. There are 170 projects in the pipeline today,” says David Colin. By 2030, GRDF Bretagne aims to double the number of methanizers connected to the network, before reaching 100% green gas in 2050. Objectives that will depend, in part, on a study by the regional council on the development of methanization. Its conclusions are expected by the end of the year.
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