Fuelled by further planet degradation concerns, the circular economy concept spreads worldwide, incorporating the need for the closing of material loops. This can be done not only by waste prevention and recycling but also by excavating old landfill sites. In line with this need, the Enhanced Landfill Mining concept was developed, which covers mining of old landfills combined with material and energy recovery from the excavated material. Site-specific investigations of excavated material are required because the way of excavated material utilisation has to be individually tailored to the material features. In this article, the valorisation options for the excavated waste from the old part of the landfill located in Mont-Saint-Guibert (Belgium) are preliminarily assessed. Seven separated waste fractions were analysed regarding their thermal decomposition pattern (TGA), pyrolysis potential (Py-GC/MS), and elemental composition (ICP-OES). Most of the analysed fractions are characterised by a highly heterogeneous composition, which excludes their primary or secondary recycling. The fractions are also characterised by high calorific value, which indicates the potential for thermochemical utilisation (i.e., pyrolysis). The presence of a significant amount of heavy metals (especially Hg and Pb) and chlorine may, however, pose a considerable risk of the contamination of pyrolysis products. It may require costly washing of the feedstock prior to the utilisation or cleaning of the process products prior to their use. Therefore, in order to limit additional costs, collective pyrolysis of all fractions seems to be a feasible way of their utilisation.

在人们对行星退化的进一步担忧的推动下，循环经济概念在全球范围内广泛传播，其中包括关闭物质循环的需要。这不仅可以通过废物预防和回收利用来实现，还可以通过挖掘旧的垃圾填埋场来实现。为满足这一需求，开发了增强型垃圾填埋场采矿概念，该概念涵盖了对旧垃圾填埋场的开采以及从挖掘出的物料中回收物料和能源的过程。需要对挖掘的材料进行特定位置的调查，因为挖掘的材料利用方式必须针对材料特征进行个性化定制。在本文中，对位于Mont-Saint-Guibert（比利时）的垃圾填埋场旧部分中挖掘出的废物进行了评估。分析了七个分离的废物级分的热分解模式（TGA），热解势（Py-GC / MS）和元素组成（ICP-OES）。大部分分析馏分的特征是组成高度异质，不包括其一级或二级回收。馏分的特征还在于高热值，这表明热化学利用（即热解）的潜力。但是，大量重金属（尤其是汞和铅）和氯的存在可能会造成热解产物污染的巨大风险。可能需要在使用原料之前先对原料进行昂贵的清洗，或者在使用之前清洗原料。因此，为了限制额外费用，