Sugarcane bagasse pith is generated as waste from bagasse-based paper industries which is still underutilized and mostly burnt as fuel in boilers. Therefore, an integrated pathway for the value-addition of the pith is explored. In the present study, hydrothermal pre-treatment of pith through response surface methodology and C/N was optimized for enhanced biogas production. At optimized conditions, a maximum biogas yield of 474.3 mL/gVS with ∼55% methane was attained with cellulose and reducing sugar of 59.2% and 3.68 g/L respectively. A severity factor of 3.8–4 was found suitable for cellulose enrichment, reducing sugar and biogas production, and at higher severity, a reduction in the above parameters was observed. Moreover, the digestate-based biochar delivered the highest biochar yield and surface area of 75.8 wt% and 254.47 m²/g respectively. This study is the first of its kind where the bagasse pith has been explored in a biorefinery approach to achieve circularity.

甘蔗渣髓是来自以甘蔗渣为基础的造纸工业产生的废物，这些工业仍未得到充分利用，并且大部分作为锅炉燃料燃烧。因此，探索了髓髓增值的综合途径。在本研究中，通过响应面法和 C/N 对髓的水热预处理进行了优化，以提高沼气产量。在优化条件下，最大沼气产量为 474.3 mL/gVS，甲烷含量约为 55%纤维素和还原糖分别为 59.2% 和 3.68 g/L。发现 3.8-4 的严重性因子适用于纤维素富集、还原糖和沼气生产，并且在更高的严重性下，观察到上述参数的减少。此外，基于消化物的生物炭提供了最高的生物炭产量和表面积，分别为 75.8 wt% 和 254.47 m ² /g。这项研究是同类研究中的第一项，其中以生物精炼方法探索甘蔗渣髓以实现循环。