The biogas thus produced will be transformed into biomethane, a green gas that will be injected into the Grdf network to be used as heating fuel or biofuel. Sludge from the wastewater treatment plant is also incinerated in the neighbouring household waste-to-energy plant. Heat recovered from the incineration of household waste and sludge will be used to heat the digesters, thus improving the energy efficiency of the waste-to-energy plant whilst eliminating the need for biogas self-consumption and allowing more biomethane to be injected into the network.
This wastewater treatment plant will also be the first in France to produce phosphorated fertilisers from wastewater as a substitute to imported mineral fertilisers. This smart coupling of a waste-to-energy plant and a wastewater treatment plant is a first in France, a virtuous model that contributes to the local energy transition and a fine example of circular economy.
- Jean Rottner, President of SIVOM de Mulhouse, President of the Grand Est Regional Council
- Régis Ochsenbein, Director of SIVOM de Mulhouse
Christelle Metral,Energy and Circular Economy market manager, SUEZ