Composting is recognized as a sustainable waste management strategy. However, little is known about green waste, and specifically rose waste, degradation patterns during composting. This study aimed (1) to gain insight in the underlying decomposition patterns during rose waste composting and (2) to identify co-metabolisms of ligneous material. Five different compost mixtures were tested ranging from pure rose waste to mixtures with tomato waste, kalanchoe waste or mature compost added. Samples were taken during a six-month experiment and analyzed by pyrolysis-GC/MS. The temporal trends in the relative abundance of 10 different compound groups were measured. Lignin and aliphatic compounds together accounted for ≥ 50% of the quantified pyrolysis products, but with changing contributions during composting. The relative abundance of polysaccharides and terpenes strongly decreased with more than 60% in the first 2 months. The simultaneous decrease in relative abundance of lignin and polysaccharides during initial composting phase indicated co-metabolism of lignin. The results from this study showed that while the presence of lignin is commonly regarded as a challenge in composting, it actually undergoes degradation through distinct mechanisms at the various composting stages.

堆肥被认为是一种可持续的废物管理策略。然而，人们对绿色废物，特别是玫瑰废物，堆肥过程中的降解模式知之甚少。这项研究的目的是（1）深入了解玫瑰废物堆肥过程中的潜在分解模式，以及（2）识别木质材料的共同代谢。测试了五种不同的堆肥混合物，从纯玫瑰废物到添加番茄废物、长寿花废物或成熟堆肥的混合物。在为期六个月的实验中采集样品并通过热解-GC/MS 进行分析。测量了 10 个不同化合物组的相对丰度的时间趋势。木质素和脂肪族化合物合计占量化热解产物的 ≥ 50%，但在堆肥过程中贡献发生变化。多糖和萜烯的相对丰度在前两个月大幅下降超过60%。在堆肥初始阶段，木质素和多糖的相对丰度同时下降表明木质素的共代谢。这项研究的结果表明，虽然木质素的存在通常被认为是堆肥中的一个挑战，但它实际上在各个堆肥阶段通过不同的机制发生降解。