The aim of this study was to investigate the effect of a soft hydrothermal pre-treatment (SHP) on olive mill solid waste (OMSW) and its subsequent anaerobic digestion (AD). OMSW was pre-treated in an autoclave at temperatures of 121 °C and 133 °C and excess pressures of 1.1 and 2.1 bars, respectively at heating times of 15, 20, and 30 min. The digestibility of pre-treated and untreated OMSW was determined in terms of methane potential through using biochemical methane potentials tests (BMP). Important solubilization of high-valuable compounds such as hydroxytyrosol and 3,4-dihydroxyphenylglycol was observed after pre-treatments. SHP showed a significant reduction in fiber length and width (p < 0.05). A higher polysaccharides solubilization was observed in treatment at 121 °C compared with that observed at 133 °C. SHP carried out at 121 °C, 1.1 bar (30 min) (pre-treatment A1), allowed obtaining the highest methane yield (380 ± 5 mL CH₄/g VS), which was 12.3% higher than that obtained for untreated OMSW. Pearson correlation (PEC) and principal component analysis (PCA) were carried out. PEC showed a positive correlation with phenol vanillic acid and PCA grouped pre-treatment A1 with polysaccharides solubilization. The influence of the SHP conditions on the AD of OMSW was assessed through the monitoring of process performance and calculation of kinetic parameters by using the transference function model.

这项研究的目的是研究软水热预处理（SHP）对橄榄磨坊固体废物（OMSW）及其后续厌氧消化（AD）的影响。OMSW在高压釜中分别在15、20和30分钟的加热时间，分别在121°C和133°C的温度以及1.1和2.1 bar的过压下进行了预处理。通过使用生物化学甲烷势测试（BMP），根据甲烷势确定了预处理和未处理的OMSW的消化率。预处理后观察到重要的高价化合物（例如羟基酪醇和3,4-二羟基苯基乙二醇）的溶解。SHP显示纤维长度和宽度显着减少（p <0.05）。与在133°C观察到的相比，在121°C的处理中观察到了更高的多糖增溶作用。SHP在121°C，1.1巴（30分钟）下进行（预处理A1），可获得最高的甲烷产率（380±5 mL CH ₄ / g VS），比未处理的OMSW高12.3％。 。进行了皮尔逊相关（PEC）和主成分分析（PCA）。PEC与苯酚香草酸呈正相关，而PCA分组的预处理A1与多糖增溶。SHP条件对OMSW AD的影响是通过监测过程性能和使用传递函数模型计算动力学参数来评估的。