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IDENTIFICATION OF IN-SITU PROCESSES CONTROLLING EMISSIONS OF A STABILISED WASTE LANDFILL BY FIELD MEASUREMENTS AND GEOCHEMICAL MODELLING

Stabilisation/solidification is a technology aimed at changing the physical/chemical properties of (hazardous) waste materials in order to reduce the release of contaminants in the environment. The technology aims at changing the release process from a percolation dominated to a diffusion or surface-dissolution dominated regime. For this form of treatment of hazardous waste for disposal in non-hazardous waste sites, the regulatory framework is still in development. In setting criteria for landfill classes in Annex II of the EU Landfill Directive (1999) it proved to be impossible to derive such values for stabilised monolithic waste due to lack of information on release and release controlling factors in stabilised waste monofills.

The stabilisation of waste for disposal is one of the major routes for treatment of hazardous waste materials. However, the regulatory framework for treatment of hazardous waste disposal in non-hazardous waste sites is still in development. For the time being, regulatory controls are referred to the Member States. Several Member States are currently working on the development of criteria. One of the major problems is the general lack of understanding of the chemical/physical processes in a stabilised waste landfill under field conditions.

Copyright:	© IWWG International Waste Working Group
Quelle:	Specialized Session E (Oktober 2007)
Seiten:	10
Autor:	Andre Van Zomeren P. Van den Berg Rob Bleijerveld Dr Hans A. Van der Sloot
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