School of Engineering, University of Borås, SE-501 90 Borås, Sweden.
Bioresour Technol. 2011 Sep;102(17):7879-86. doi: 10.1016/j.biortech.2011.05.071. Epub 2011 May 31.
Given that N-methylmorpholine-N-oxide (NMMO) is a promising alternative for the pretreatment of lignocelluloses, a novel process for ethanol and biogas production from wood was developed. The solvent, NMMO, is concentrated by multistage evaporation, and the wood is pretreated with the concentrated NMMO. Thereafter, ethanol is produced by the non-isothermal simultaneous saccharification and fermentation (NSSF) method, which is a rapid and efficient process. The wastewater is treated by upflow anaerobic sludge blanket (UASB) digester for rapid production of biogas. The process was simulated by Aspen plus®. Using mechanical vapor recompression for evaporators in the pretreatment and multi-pressure distillation columns, the energy requirements for the process were minimized. The economical feasibility of the developed biorefinery for five different plant capacities was studied by Aspen Icarus Process Evaluator. The base case was designed to utilize 200,000 tons of spruce wood per year and required M€ 58.3 as the total capital investment, while the production cost of ethanol is calculated to be €/l 0.44.
鉴于 N-甲基吗啉-N-氧化物（NMMO）是预处理木质纤维素的一种很有前途的替代品，因此开发了一种从木材中生产乙醇和沼气的新工艺。溶剂 NMMO 通过多效蒸发浓缩，浓缩后的 NMMO 预处理木材。此后，通过非等温同步糖化发酵（NSSF）法生产乙醇，该方法是一种快速高效的工艺。废水通过上流式厌氧污泥床（UASB）消化器处理，以快速生产沼气。该工艺通过 Aspen plus®进行模拟。在预处理和多压蒸馏塔中使用机械蒸汽再压缩蒸发器，使工艺的能源需求最小化。Aspen Icarus Process Evaluator 研究了用于五种不同工厂产能的开发生物炼制厂的经济可行性。基础案例设计为每年利用 20 万吨云杉木材，总资本投资需要 5830 万欧元，而乙醇的生产成本预计为每升 0.44 欧元。
