Step 2: Improve our environmental impacts


Air PollutionThe aim is to gradually reduce air emissions, which mainly come from the glass-melting furnaces. The primary measures (optimization of the combustion and/or glass batch) are applied as a priority by Saint-Gobain Glass. In this way, the direct emissions of NOx nitrogen oxides released during the melting of 1 ton of SGG PLANILUX glass were reduced by 28% over a worldwide perimeter, between 2007 and 2010, thanks to the implementation of these primary measures.

In addition, systems for treating gas emitted at the chimney stacks have been installed to reduce dust,SOx sulfur oxides, heavy metals and acid gas (HF and HCl) emissions. 8 new gas filtration systems have been installed since 2007, bringing the total number of sites equipped to 19 in 2010. In this way, the amount of dust emitted during the melting of one ton of glass was reduced by 40% in 2011 compared to 2007, over a worldwide perimeter.

In 2012, all Saint-Gobain Glass floats in Europe will be equipped with filtering systems to reduce the dust contained in the exhaust gas. 80% of the furnaces will be equipped in the same way worldwide.

The glass-making process is not the cause of VOC (volatile organic compounds) emissions due to the high temperature maintained in the melting furnaces. On the other hand, the manufacturing of mirrors or lacquered glass may cause VOC emissions, due to the solvents contained in the paint (lacquer). 95% of the facilities manufacturing mirrors and lacquered glass are equipped with thermal oxidizers enabling a drastic reduction of VOC emissions. The sites still unequipped will be by 2014.

  © Saint-Gobain Glass