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The Avenue Coke Works Processed coal to produce coke Coke used as a smokeless fuel and in the steel-making industry Wastes from the process left behind when the works closed in 1992 The Avenue Coking works was built in the 1950's. Its main purpose was to treat coal to produce coke. This is a form of solid coal. Coke can be used as a smokeless fuel to heat houses or in the steel-making industry. The site also produced tar, benzole and sulphuric acid as by products of the process. This was a heavy, industrial process and it produced a lot of waste materials. Some were dumped on the site and others just contaminated the ground that the buildings stood on. The works closed in the 1992 and the clean-up process started in 1999.
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Cleaning oil-contaminated soil at the Avenue
The Avenue Coke Works
• Processed coal to produce coke• Coke used as a smokeless fuel and in the
steel-making industry• Wastes from the process left behind
when the works closed in 1992
Treating oily waste
• Oily waste was just dumped into big ponds or lagoons
• The waste needs to be dug out and treated
Thermal treatment plant
• Treat soil contaminated with oily substances• Burns them off to leave mostly water and carbon dioxide
Thermal treatment
• Heavily contaminated soil is mixed with processed soil
• Gives soil of the correct ‘stickiness’ to go into the thermal treatment plant
Thermal treatment plant
• Soil enters a rotary kiln (rotating oven)• Heated to 600oC• Contaminants driven off as gases• Cleaned soil is cooled for re-use
Thermal treatment plant
• Gases are collected• Particulates filtered out• Gases burned at 1,200oC• Products are mostly carbon dioxide and
water
Thermal treatment plant
• 24 hours a day, 7 days a week• 270,000m3 of soil• Cover football pitch with a pile 54m high
