Supplying the Roussillon chemical platform with local, green, sustainable and competitive energy
To cut CO2 emissions and to use at least 20% of renewable energy to supply the platform
The 150-hectare site, which was created in 1915, is dedicated to the production of chemicals and consumes the equivalent of a town with 150,000 inhabitants every year. Until 2014, the site’s energy resources were made up mainly of gas (1.2 TWh/year), coal (100,000 tonnes/year) and 0.5 TWh of electricity.
In 1999, the site created the Osiris GIE (economic interest group) and set some ambitious objectives: to cut the site’s CO2 emissions by 20% by 2020 and to consume at least 20% of renewable energy, including biomass, to produce steam for the industrial companies.
As part of its bid to protect resources, the GIE called on a number of environmental specialists, including SUEZ, which had already be active on the platform for several years.
In an effort to reach its objective of diversifying its energy resources and cutting its consumption of fossil energies, in 2014 the GIE formally asked SUEZ to support its energy transition by signing a 15-year contract.
Reduce the proportion of fossil energies by recovering previously unused biomass
Produce energy from unused local biomass
Recovery of non-recyclable resources from woodland biomass, non-recyclable paper or waste wood (non-hazardous wood and treated wood), which was previously buried or unused. Based on a circular economic model, the recovery unit can transform 50,000 tonnes/year of biomass made up of several families of unused waste into a resource:
- +/- 15,000 tonnes of non-recyclable paper
- +/- 15,000 tonnes of end-of-life non-hazardous wood
- +/- 15,000 tonnes of impregnated waste wood
- +/- 10,000 tonnes of solid waste containing biomass
This biomass waste is collected mainly in the Auvergne Rhône Alpes region, in a 150 km radius around the site, thereby increasing the environmental benefits of the process.
Improve the energy efficiency of steam production with the fluid bed technology
This technological option optimises the efficiency of the steam production. More than 85% of the energy contained in the fuels is transformed into clean steam, representing a power of production of more than 21 MW. By producing 30 tonnes/hour, the plant covers 15% of the energy needs of the platform, which consumes 180 tonnes/hour.
Treat the plant’s fumes to improve emissions into the atmosphere
Since the fumes produced by incineration are acid and loaded with polluting agents, they are treated in two steps:
- in the boiler, to treat the nitrogen oxides,
- by a bag filter that purifies, neutralises and captures the polluting agents. The activated carbon treats heavy metals and dioxins, while the lime neutralises the acid gases and captures the sulphur oxides.
A sustainable and competitive partnership
A sharp improvement in energy and environmental performance
SUEZ has helped the platform to increase the proportion of renewable energy it consumes, while rising to the challenge of protecting resources. This contract has boosted industrial companies’ competitive performance, because the unit now also contributes to the achievement of the environmental performance objectives:
- for 1 tonne of waste destroyed, the process recovers 2 tonnes of waste,
- for 1 tonne of CO2 produced by the platform’s activities, 2 tonnes of CO2 are avoided.
- the plant makes savings of 15,000 tonnes of oil equivalent per year and avoids 56,000 tonnes of CO2 emissions, which is equivalent to the CO2 emitted by 10,000 inhabitants of France per year.
- on the scale of the Rhône Alpes region, the Robin Roussillon project saves one thousandth of the greenhouse gases produced by all the sectors in the region.
The project has also created 12 direct jobs and several indirect jobs.