Department of Environmental Engineering, Technical University of Denmark, DK-2800 Kgs Lyngby, Denmark.
Bioresour Technol. 2011 Jan;102(2):1433-9. doi: 10.1016/j.biortech.2010.09.071. Epub 2010 Sep 22.
The present study investigated the utilization of the whole rapeseed plant (seed and straw) for multi-biofuels production in a biorefinery concept. Results showed that bioethanol production from straw was technically feasible with ethanol yield of 0.15 g ethanol/g dry straw after combined alkaline peroxide and stream pretreatment. The byproducts (rapeseed cake, glycerol, hydrolysate and stillage) were evaluated for hydrogen and methane production. In batch experiments, the energy yields from each feedstock for, either methane production alone or for both hydrogen and methane, were similar. However, results from continuous experiments demonstrated that the two-stage hydrogen and methane fermentation process could work stably at organic loading rate up to 4.5 gVS/(Ld), while the single-stage methane production process failed. The energy recovery efficiency from rapeseed plant increased from 20% in the conventional biodiesel process to 60% in the biorefinery concept, by utilization of the whole rapeseed plant for biodiesel, bioethanol, biohydrogen and methane production.
本研究探讨了在生物炼制概念下，利用整株油菜籽（种子和秸秆）生产多种生物燃料的方法。结果表明，通过联合碱过氧化和流态化预处理，从秸秆中生产生物乙醇在技术上是可行的，乙醇得率为 0.15 g 乙醇/g 干秸秆。对副产物（菜籽饼、甘油、水解物和酒糟）进行了氢气和甲烷生产评估。在分批实验中，来自每种原料的能量产率，无论是单独用于甲烷生产还是同时用于氢气和甲烷生产，都相似。然而，连续实验的结果表明，两级氢气和甲烷发酵过程可以在有机负荷率高达 4.5 gVS/（Ld）的情况下稳定运行，而单级甲烷生产过程则无法运行。通过将整株油菜籽用于生物柴油、生物乙醇、生物氢气和甲烷生产，从油菜籽植物中回收的能源效率从传统生物柴油工艺的 20%提高到生物炼制概念的 60%。
