Laboratory of Optimization, Design, and Advanced Control - Fermentation Division (LOPCA-Ferm), School of Chemical Engineering, University of Campinas (UNICAMP), Campinas, SP, Brazil.
Laboratory of Optimization, Design, and Advanced Control - Fermentation Division (LOPCA-Ferm), School of Chemical Engineering, University of Campinas (UNICAMP), Campinas, SP, Brazil.
Bioresour Technol. 2020 Oct;314:123712. doi: 10.1016/j.biortech.2020.123712. Epub 2020 Jun 24.
This work presents a techno-economic analysis of the production of isopropanol, butanol, and ethanol (IBE) from sugarcane bagasse using clostridia and compares IBE with cellulosic ethanol for the minimum selling price (MSP) and sustainability aspects. The MSPs of the fuels are similar (15 USD/GJ) provided that glucose and xylose are effectively utilized in both processes, and the IBE process is equipped with a genetically-modified Clostridium species with enhanced IBE yield and a highly productive continuous bioreactor with integrated product recovery. Notably, these technologies can reduce the size (from 23 × 3785-m to 3 × 3027-m fermentation tanks) and the wastewater footprint (from 50 to 10 m/m IBE) of the IBE plant. Furthermore, given that the production of either fuel results in a similar increase in the value created by the sugarcane biorefinery and its energy efficiency, the alcohol mixture produced by clostridia is a promising alternative to the less energy-dense ethanol fuel.
这项工作对利用梭菌从甘蔗渣生产异丙醇、丁醇和乙醇（IBE）进行了技术经济分析，并对 IBE 与纤维素乙醇进行了比较，从最低销售价格（MSP）和可持续性方面进行了比较。如果两种工艺都能有效地利用葡萄糖和木糖，并且 IBE 工艺配备了具有增强 IBE 产量的基因改良梭菌物种和具有集成产品回收功能的高产连续生物反应器，则燃料的 MSP 相似（15 美元/GJ）。值得注意的是，这些技术可以减小 IBE 工厂的规模（从 23×3785-m 发酵罐减小到 3×3027-m 发酵罐）并减少废水足迹（从 50 减少到 10m/mIBE）。此外，鉴于生产任何一种燃料都会使甘蔗生物炼制厂及其能源效率创造的价值增加，因此梭菌生产的酒精混合物是一种很有前途的替代能源，替代能量密度较低的乙醇燃料。
