Through its subsidiary SERAMM in Marseille, SUEZ officially began the construction of a biomethane production and injection plant, generated from wastewater treatment process. Aix-Marseille-Provence metropolitan area, SUEZ, the French Water Agency, the French Environment and Energy Management Agency (ADEME) and Provence Alpes Côte d’Azur region invest €9.2 millions in the conversion of part of Marseille’s Géolide wastewater treatment plant.
As the company manages the wastewater treatment system for Marseille urban area and four other municipalities in the Aix-Marseille-Provence metropolitan area, SUEZ provides local solutions to improve its customers’ economic and environmental performance. Thus, in Marseille, SUEZ invested in the conversion of its sewage sludge treatment plant, located in Sormiou quarry since 1987, to launch the biggest biomethane production project ever seen in France.
From 1 January 2019, the biogas produced in the sludge digestion process will be collected, converted into biomethane and injected into the public natural gas network at a rate of 2.3 million Nm3 a year. The facility has been designed with a future extension in mind of 3.8 million Nm3/year, making it the largest in France. The new biomethane plant will also offer several environmental benefits: the proportion of recoverable biogas will increase by 35% while CO2 emissions should drop by 30%.
Aix-Marseille-Provence metropolitan area will be able to produce enough green energy to supply about 2,500 households. Moreover, the biomethane will be used, in the longer term, as a biofuel for public transport running on natural gas. “This facility will enable our metropolitan area to produce a more environmentally friendly energy. We take action in a wide range of areas including transport, economic development, the energy transition and a better quality of life for our residents,” said Jean-Claude Gaudin, President of Aix-Marseille-Provence metropolitan area and Mayor of Marseille.