In 1997, the landfilling of biodegradable waste was banned in Denmark, and currently Danish landfills receive mostly non-combustible waste with a low-organic content. This study aimed to investigate trace gas composition in landfill gas (LFG) at modern Danish landfills. Landfill gas samples were taken from waste cells containing shredder, mixed and aged waste from four Danish landfills. The highest trace gas concentrations were found in shredder waste cells (average concentration of 10³ mg m⁻³), which were comparable with conventional municipal solid waste landfills receiving organic waste. Aliphatic hydrocarbons and aromatics were dominant in the shredder waste cells, most likely released through direct volatilisation from disposed waste products. Abundant oxygenated compounds were found in the shredder waste cell in one of the landfills, thereby indicating a higher level of organic fraction biodegradation. Benzene, toluene, ethylbenzene and xylenes (BTEXs) were measured in high concentrations in all shredder waste cells, contributing to more than 75% of total aromatics. Considerably lower concentrations of trace gases were measured in the mixed and aged waste cells, which were dominated by hydrogen sulphide and several aliphatic hydrocarbons. A constant concentration ratio was established between aliphatic hydrocarbons together with aromatics and methane in shredder waste cells, which was then used in an LFG generation model to estimate trace gas production. The production rates of BTEXs from two landfills were estimated at 272 and 73 kg yr⁻¹ in 2020, which were not considered to pose a significant risk to the environment or to human health.

1997年，丹麦禁止对可生物降解废物进行填埋，目前丹麦的垃圾填埋场接收的大部分都是有机含量低的不燃废物。这项研究旨在调查现代丹麦垃圾填埋场中垃圾填埋气（LFG）中的微量气体成分。垃圾填埋气样品来自包含碎纸机的废料池，来自四个丹麦垃圾填埋场的混合垃圾和老化垃圾。在粉碎废料池中发现最高的痕量气体浓度（平均浓度为10 ³ mg m ^-3），可与接受有机废物的传统市政固体垃圾填埋场相提并论。脂肪烃和芳烃在粉碎机废料池中占主导地位，最有可能通过直接挥发从处置的废品中释放出来。在其中一个垃圾填埋场的切碎机废料池中发现了丰富的含氧化合物，从而表明有机部分的生物降解水平更高。在所有切碎机废料池中均以高浓度测量了苯，甲苯，乙苯和二甲苯（BTEX），占芳烃总量的75％以上。在混合和老化的废电池中测得的痕量气体浓度要低得多，这些废电池主要由硫化氢和几种脂肪烃组成。在粉碎废料池中，脂肪烃与芳烃和甲烷之间建立了恒定的浓度比，然后将其用于LFG生成模型中以估算痕量气体的产生。估计两个垃圾填埋场的BTEX生产率分别为272和73千克/年2020年^-1，这被认为不会对环境或人类健康构成重大风险。