Waste burning study suggests need for wider dioxin controls

Studies of emissions from waste burning processes by Warren Spring Laboratory (WSL) have shown that major improvements in combustion control and abatement techniques will be needed to comply with the requirements of the Environmental Protection Act 1990. The findings suggest that new controls on dioxin emissions may be needed for the combustion of tyres, wood and straw - and perhaps coal.

The study, commissioned in 1990 by the Energy Technology Support Unit (ETSU), assessed the basic combustion characteristics of various waste fuels. For comparison, coal combustion was also studied. Emission samples were taken before the flue gases entered any abatement equipment other than a simple grit arrestor.

Results for five waste fuels were presented by WSL's John Barton at a recent conference in Glasgow.1 They make an in

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