France: Emissions-processing system
Since March 2009, a new emissions-processing system has helped improve the ecological and economic performance of the French roof-tile site at Pargny sur Saulx (Marne).
The new emissions-processing system at the Pargny sur Saulx (France) roof-tile plant involves treating emissions by the injection of sodium bicarbonate. Rapidly, the new setup has cut all pollutant concentrations by a factor of 35 and, more particularly, by a factor of 40 in the case of sulfur dioxide. Given that emissions are now below the threshold for the TGAP(1) air pollution tax, the site is no longer classified as polluting.
The process also allows the plant to inject emissions back into the energy recovery network in order to decrease consumption. At constant production volumes, the gain corresponds to 12.5% of gas consumption.
The treatment of emissions as it is now practiced in Pargny results in a residual waste that the Group seeks to exploit. Tests were performed in the laboratory for this waste to be reused as flux in the bricks. A semi-industrial test was conducted on the Mably (Loire) site.
(1) General tax on polluting activities.