Second wet air oxidation plant enters liquid disposal market

Wet air oxidation technology has made further inroads into the UK hazardous waste disposal business with the announcement of a new unit for Yorkshire Water's Knostrop sewage works near Leeds. But the growing interest in the process is raising questions about whether it should be regulated.

The wet air oxidation process degrades aqueous organic wastes by exposing them to high temperatures and pressures. It is of particular interest for the disposal of toxic or intractable materials which may not respond well to biological treatment.

The £1.2 million Knostrop plant will be the third in the UK. A similar unit is nearing completion at Sterling Organics' site in Dudley, North Tyneside (ENDS Report 192, pp 3-4), as is Leigh

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