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2. Liming waste
Adding lime to organic waste is a simple stabilization technique, particularly suited to organic waste. The resulting residue is so dry, biologically stable and workable that it can be used for agricultural purposes. In some cases, the aim of stabilizing waste by liming is to achieve the limits set by regulations for landfill acceptance, i.e. a dryness of over 30%, a pH of over 6 and a limited TOC content.
2.1 Liming principle
Liming waste consists of mixing it with quicklime. During mixing, the lime reacts with the water contained in the waste (or added jointly), according to the following hydration reaction:
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Liming waste
Stabilization with hydraulic binders
Bibliography
Events
Congress
WASCON (Waste materials in construction). These conferences are held every three years and provide an update on stabilization techniques, with particular emphasis on the possibilities for recycling the resulting materials. Proceedings are published by Elsevier (Pergamon).
Two conferences have been held in France on stabilization-solidification processes, in Nancy in 1995 and Lyon in 1999....
Standards and norms
French Standards Association (AFNOR)
- Waste – Guidance for the selection of a waste leaching test. - XP X 30-417 - Mai 2002
- Waste – Determination of massive solid character. - XP X 31-212 - Juillet 1995
- Waste – Leaching test on a solid waste initially massive or generated...
Regulations
Below is a reminder of the main legislation on waste disposal cited in this article.
European Union
Directive no. 2008/98/EC of November 19, 2008 on waste and repealing certain directives.
Directive no. 1999/31/EC of April 26, 1999 on the landfill of waste.
Directive no. 1999/45/EC of May 31, 1999 concerning the approximation...
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