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ENVIRONMENT<br />

Reducing volatile organic<br />

compounds in can making<br />

In the beverage can making process,<br />

aluminium and steel coils are converted into<br />

cans via a draw wall iron process, with<br />

subsequent coating, decoration and lacquering.<br />

Since 1996, our beverage can operations in<br />

Europe and the Middle East have implemented<br />

progressive environmental management systems<br />

(EMS) in accordance with the requirements of<br />

ISO 14001 in their manufacturing locations.<br />

This has allowed us to adopt a continuous<br />

improvement philosophy in minimizing<br />

environmental impacts.<br />

The work done to reduce the level of volatile<br />

organic compounds (VOCs) used during our<br />

production process (by switching to water-<br />

based coatings and lacquers) is one example<br />

that demonstrates our commitment to resource<br />

efficiency.<br />

The switch has allowed us to reduce the level<br />

of VOCs emitted to atmosphere by 50% over<br />

the last ten years. It has also further reduced<br />

the level of VOCs present within manufacturing<br />

locations as well as the VOC content of any<br />

waste coatings and lacquers not used in the<br />

process. Water-based materials also provide<br />

options for compliance with the EU Directive<br />

13/99/EC.<br />

Thermal oxidisers<br />

Typically thermal oxidisers are required to<br />

allow compliance with VOC emission<br />

concentration limits, but the move away from<br />

high solvent materials means that abatement<br />

is not always required to meet legal<br />

responsibility<br />

<strong>case</strong> study<br />

compliance. As a result, CO2 emissions are<br />

significantly reduced through a reduction in<br />

the use of gas fired incinerators. In addition,<br />

moving up the supply chain, the drive for<br />

water-based materials has also reduced<br />

suppliers’ VOC emissions.<br />

Collaborative working<br />

The reduction in VOC’s has been achieved<br />

by working collaboratively with key direct<br />

material suppliers. Suppliers are allocated<br />

projects and targets to develop reduced VOC<br />

products e.g. water-based materials. Their<br />

progress is then measured through our formal<br />

supplier development programme, which<br />

includes regular reviews and support when<br />

and where required. By making this a part of<br />

the Rexam Supplier Development Programme,<br />

suppliers are motivated to continually<br />

improve their products to help meet our<br />

environmental requirements. Subsequently a<br />

partnership approach is adopted to enable<br />

continual improvements in VOC reductions.<br />

In addition to asking our suppliers to reduce<br />

VOC’s, the business actively encourages<br />

direct material suppliers to consider the<br />

development of a ‘step-change’ technology<br />

that could potentially eliminate VOC<br />

emissions entirely from their products.<br />

The development of such coatings incurs<br />

research and development costs. However,<br />

the environmental benefits, together with the<br />

cost savings in avoiding purchase of<br />

abatement equipment and their associated<br />

running costs, are significant, specifically a<br />

reduction in hazardous waste quantities and<br />

improved coating and print quality.<br />

EMISSIONS<br />

“Adopting a<br />

continuous<br />

improvement<br />

philosophy in<br />

minimizing our<br />

Environmental<br />

impacts”

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