Department of Civil Engineering, Federal University of Pernambuco, Recife, Brazil.
Department of Chemical and Food Engineering, Federal University of Santa Catarina (UFSC), Brazil Florianópolis, Brazil.
Sci Total Environ. 2022 Jun 1;823:153613. doi: 10.1016/j.scitotenv.2022.153613. Epub 2022 Feb 4.
Among the various methods of pre-treatment of lignocellulosic waste with the objective of optimizing the production of methane, silage stands out as a promising alternative due to its operational simplicity, low cost and effective results. In this work, the silage of orange waste (Citrus cinensis) with 14 and 21 days and its influence on the potential of methane generation was evaluated, also evaluating the impacts of silage on the kinetics of the process. Among several configurations of substrate and inoculum studied, the best configuration observed was using the ensiled residue with 21 days and granular anaerobic sludge (ENS21 + GS), reaching a methane generation potential of about 171 N mL·g VS, increasing by 119% in terms of methane generation potential without silage pre-treatment (WENS+GS), obtaining biogas with 70% in CH. In relation to the kinetics, the silage process drastically interfered in the kinetic behavior of the methane production, being the Cone model the one that obtained the best adjustments, among those studied, for the orange bagasse residue in the evaluated experimental conditions. Silage is an attractive alternative to increase the production of methane for lignocellulosic waste, as a pre-treatment, without significantly increasing operating costs, and it can also be associated with other sequential processes to take advantage of the maximum energy potential of lignocellulosic waste.
在预处理木质纤维素废物以优化甲烷生产的各种方法中，青贮作为一种有前途的替代方法脱颖而出，因为其操作简单、成本低且效果显著。在这项工作中，评估了橙皮废物（Citrus cinensis）的青贮（14 天和 21 天）及其对甲烷生成潜力的影响，并评估了青贮对工艺动力学的影响。在所研究的几种底物和接种物配置中，观察到的最佳配置是使用经过 21 天青贮的残渣和颗粒厌氧污泥（ENS21+GS），达到约 171 N mL·g VS 的甲烷生成潜力，与未经青贮预处理的 WENS+GS 相比，甲烷生成潜力提高了 119%，得到了 70%CH 的沼气。关于动力学，青贮过程严重干扰了甲烷生产的动力学行为，在研究的 Cone 模型中，在评估的实验条件下，该模型最适合用于评估的橙皮渣。青贮是增加木质纤维素废物甲烷产量的一种有吸引力的替代预处理方法，因为它不会显著增加运营成本，并且还可以与其他连续过程结合使用，以充分利用木质纤维素废物的最大能源潜力。
