Incineration bottom ashes of non-hazardous waste including household garbage / Site of the motorway

Non-hazardous waste incineration bottom ash (NHWI) is the solid residue resulting from the combustion of the unsorted fraction of household waste in incineration plant furnaces (grate, roller or oscillating furnaces). This fraction collected by the public service is generally mixed to a greater or lesser extent with commercial waste.

Annual bottom ash production in France can be estimated at around 3 million tonnes, representing between 20 and 25% by gross weight of incinerated waste.

Bottom ash is mainly used in road-building techniques in certain parts of structures.

The previous article [C 5 380] defines the conditions for using MIDND from an environmental point of view, based in particular on the ministerial decree of November 18, 2011 and the recommendations of the SETRA guide "Environmental acceptability of alternative materials in road techniques – Les MIDND" published in October 2012.

The feedback presented in this article clearly illustrates the process from the incineration plant to the bottom ash storage and treatment facility, for the manufacture of the products to be used on site.

In the last paragraph, readers will find a table summarizing the acronyms and abbreviations used in this article.