Towards a sharing of expertise between Syctom and GRTgaz...
Syctom and GRTgaz will share their expertise on the transformation of sewage sludge and household waste into renewable gas, and on the coupling of renewable gas sectors (anaerobic digestion and pyro-gasification). The long-term goal is to recover part of the 7,500 tonnes per day of household waste from the Île-de-France region managed by Syctom and transform it into sustainable, transportable energy in the gas networks, in a way that aligns with the principles of the circular economy.
This partnership is part of the Cométha project, which brings together Syctom, the metropolitan household waste agency, and SIAAP, the Paris regional wastewater authority, to improve the recovery of household waste and domestic, industrial and rainwater waste in the Île-de-France region. The aim is to reduce the residual volumes resulting from the treatment of this waste, while maximising energy production.
Initially, the cooperation between Syctom and GRTgaz will involve providing expertise relating to the pyro-gasification sector, including its anaerobic digestion component. The aim is to analyse the technical feasibility of using pyro-gasification as a way of recovering digestates from co-anaerobic digestion, linked to the assumption that digestate will not be returned to the ground.
GRTgaz will provide Syctom with its expertise in the various renewable gas production technologies and in the quality of gas obtained. In particular, the company will call on the skills of its Research & Innovation Center for Energy (RICE).
Renewable gas sectors
- Anaerobic digestion involves the degradation of organic matter in the absence of oxygen. This process produces biogas. Once purified, it becomes biomethane, which can be injected into existing gas networks, and an organic residue, digestate.
- Pyro-gasification is based on a thermochemical process. Waste is heated to a temperature between 800 and 1,500°C in the absence of oxygen, and therefore without combustion. Its purpose is to break down the material into different gaseous molecules, which will then be recombined by anaerobic digestion to produce a gas that can be injected into the existing networks and meet the needs of different uses (domestic, industrial, mobility, etc.).