Overgrowth of water primrose (Ludwigia grandiflora) causes environmental problems worldwide. Anaerobic digestion of L. grandiflora is a low-cost treatment. However, lignin in the lignocellulose matrix of the biomass limits the anaerobic digestion process. Therefore, steam explosion was performed at 11 different severity factors with different combinations of temperature and retention time before anaerobic digestion to enhance the microbiological conversion of the lignocellulosic biomass. Increasing severity of the pre-treatment caused biomass solubilisation, which resulted in the production of inhibitors such as dissolved lignin and phenolic compounds. The maximum methane yield was 272.4 mL g-VS⁻¹ at 165 °C for 30 min at a severity factor of 3.3, achieving a 3.2-fold increase compared to that of untreated biomass. At SF higher than 3.3 and temperature higher than 165 °C, the methane yield started decreasing, indicating the effect of inhibitors. Thus, steam explosion pre-treatment effectively enhanced the methane production of L. grandiflora despite its high lignin content and woody structure.

月见草（Ludwigia grandiflora）的过度生长引起了全世界的环境问题。大花乳杆菌的厌氧消化是一种低成本的治疗方法。然而，生物质的木质纤维素基质中的木质素限制了厌氧消化过程。因此，在厌氧消化之前，以11种不同的严重程度因子，不同的温度和保留时间组合进行蒸汽爆炸，以增强木质纤维素生物质的微生物转化率。预处理的严重性提高导致生物质溶解，从而导致产生抑制剂，例如溶解的木质素和酚类化合物。最高甲烷产量为272.4 mL g-VS ^-1 在165°C下30分钟，强度因子为3.3，与未处理生物质相比，增加了3.2倍。在SF高于3.3和温度高于165°C时，甲烷产量开始下降，表明了抑制剂的作用。因此，蒸汽爆炸预处理有效地提高了甲烷生产L.玉兰尽管其高木质素含量和木质结构。