Reusing mine water Water stress is a major issue in France and in the Île-de-France region.Mine water is collected from rainwater infiltration, flood and groundwater tables during underground works. To this day, the majority of mine water is poured into the sewer system, canals in Paris or natural environments (the Seine river, Canal Saint-Martin and Canal Saint-Denis).As the first mine water collector in the Île-de-France region with over 8 million m3 collected annually in dewatering stations across the network, RATP Group has already set up a number of optimisation measures.Over the last three years, the Group has contributed approximately 400,000 m3 to the non-potable water network to water green spaces (such as tram line T3’s platform grass), clean streets and supply the City of Paris cooling network. In May 2023, RATP Group and its partners launched the first scientific consortium dedicated to mine water reuse. The main objective is to identify reuse opportunities for mine water, thus taking another step towards resilient and concerted water management.
Reusing residual heat Our server cooling system consumes approximately a third of the energy of a data centre, regardless of the chosen cooling method. Residual heat produced by cooling systems is recovered and turned into energy resources.
Repurpose unused real estate properties Repurposing RATP Group’s industrial sites presents an opportunity to integrate temporary use of its real estate into its project plans. The Group has signed the Charter for the temporary use of buildings (Charte pour l’occupation temporaire et transitoire) a Mairie de Paris initiative. In line with this commitment, the Group makes its unused real estate properties available to host social and inclusive projects, or projects related to arts and entertainment. Doing so brings neighbourhoods to life and encourages diversity for both people and practices.
The OPEN tool (a tool to monitor water and energy consumption) Deployed in 2020, the OPEN tool is an innovative digital solution to monitor all fluid resources consumption (water and energy) across the company’s 115 industrial and office sites, and its 369 stations. It now has 450 users, with over 1,400 meters registered. Using this tool contributes to maintaining RATP Group assets’ environmental and energy performance by providing better consumption monitoring and improved responsiveness in the event of discrepancy.It also provides an opportunity for operational teams to implement practical measures that are instantly measurable and relevant, notably in accordance with ISO 50001-standard tracking.