In this study, the effects of alkaline pretreatment (2% NaOH) of water primrose on its biogas production efficiency and anaerobic co-digestion of cow dung were investigated. A scanning electron microscope (SEM) was used to analyze the changes in main compositions and physico-chemical structure of water primrose after pretreatment and untreated biomass. Furthermore, the experiments evaluate the efficiency and optimization mixing ratio of co-digestion using water primrose and cow dung. The pretreatment of water primrose at different periods for the examination of the biodegradability matters in the substrate and biogas production. Among the three mixing ratios of co-substrate tested, the best performance in this study was achieved at mixing ratio 2:1 (water primrose to cow dung, w/w) for 2 weeks’ pretreatment time on grass, including all measurements as biogas production (8610 mL), methane concentration (68.2%), and percentage of total solids (70.84%), volatile solids (64.76%), and chemical oxygen demand (66.55%) removal efficiency.

在这项研究中，研究了报春水碱预处理（2％NaOH）对其沼气生产效率和牛粪厌氧消化的影响。扫描电子显微镜（SEM）用于分析预处理和未处理生物质后樱草的主要成分和理化结构的变化。此外，实验评估了使用樱草水和牛粪共消化的效率和最佳混合比例。在不同时期对报春水进行预处理，以检查底物和沼气中的生物降解性。在测试的三种共底物混合比例中，本研究中的最佳性能是在草地上进行2周的预处理，混合比例为2：1（月见草与牛粪的重量比，w / w），