DEVELOPMENT OF THE SLUDGE VITRIFICATION PROCESS AT THE KAPITI COAST SEWAGE TREATMENT WORKS IN NEW ZEALAND

Proceedings

DEVELOPMENT OF THE SLUDGE VITRIFICATION PROCESS AT THE KAPITI COAST SEWAGE TREATMENT WORKS IN NEW ZEALAND

Keith A. Denham 1, Chris Wilson2, Rick Dobbs3and John A. Hudson4
1, 2,3 Lemar Environmental Ltd, New Zealand.
Independent Consultant
(free)

Vitrification of sewage sludge ash has been of interest as a final stage in the incineration process, to “lock up” the metals and prevent leaching when the disposal of the final product takes place. The current paper outlines the efforts of Lemar International Ltd to construct a vitrification plant for the treatment of sludge for the Kapiti District Council in New Zealand. The plant consists of dewatering and drying stages upstream of a vitrification plant, which destroys the organic matter as well as vitrifying the ash.

KEY WORDS Dewatering, Drying, Sewage Sludge, Vitrification

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Proceedings