Global building solutions company, CEMEX, has published detailed test results from a trial using chipped tyres as part-replacement for coal to fuel the cement kiln at Rugby Works in Warwickshire.
Data show a marked reduction in certain emissions from the chimney during the trial. Most notably, oxides of nitrogen which affect air quality, decreased by 30%. A preliminary report with results from the 1,000 hour trial completed last December describes the Work's successful performance against each of seven critical success factors identified in the Work's permit (IPPC Permit BL7248).
A copy of the preliminary tyre trial report is available on the CEMEX website, see www.cemex.co.uk. Copies of the report are also being sent to key local stakeholder bodies. CEMEX is inviting all interested parties to consider the report and provide comment by 30 September.
Following the three and a half month consultation period, a final copy of the report will be presented to the plant's regulator, the Environment Agency, requesting permission to use tyres permanently.
Increasing the use of alternative fuels is key to improving environmental performance. The company therefore also recently announced that it intends to apply to the Environment Agency, for permission to trial a further alternative fuel, Climafuel. Climafuel is a shredded, dry waste material that would typically consist of household refuse, screened paper, cardboard, wood, carpet, textiles and plastics.
All recoverable materials are removed for recycling purposes, while the remaining waste is subjected to a rapid drying and composting process to produce a solid, clean and non-hazardous fuel. In addition to the direct environmental benefits of reduced emissions, using alternative fuels, like tyres and Climafuel, have indirect benefits, such as recovering energy from what would otherwise be considered a waste material.
Each year 40 million tyres are scrapped in the UK, and over 215,000 tonnes of other waste is sent to landfill in Warwickshire. Using alternative fuels at Rugby Works could help to minimise illegal dumping, reduce landfilling and preserve fossil fuels for future generations.
Notes to editors:
Tyre substitution: During the trial tyres constituted an energy replacement of 12%. Critical success factors: The tyre trial report demonstrates that all of the critical success factors as listed in Section 10 of the Permit have been met with regard to: Compliance with emission limit values Process efficiency Improved overall environmental impact Acceptable assessment by Environment Agency Officers Stable operations Stability between fuel changes Quality assured data Rugby Works: CEMEX's Rugby Works is one of the most modern plants in the world and represents a total investment of £200 million. It has the largest kiln in the UK and has a production capacity of 1.8 million tonnes of cement per annum. CEMEX supports 730 local jobs in Rugby (183 at the works), contributes £25.5 million per annum to the local economy and provides a product that is essential locally and nationally, for housing, hospitals, schools and roads. Every year Rugby produces enough cement for the construction of more than 72,000 houses (assuming that an average house contains approximately 18 tonnes of cement). For more information, please see www.cemex.co.uk.