本文运用TRIZ理论矛盾分离原理对酒精发酵CO2气纯化回收工艺系统进行分析,利用条件分离方法和系统分离方法解决系统中存在的物理矛盾,再根据技术系统进化法则构造回收系统进化方案,优化集成"复合精洗+再生吸附+节能干燥+低温精馏"工艺组合,创新设计酒精发酵气二氧化碳回收纯化工艺系统,简化工艺流程,大幅降低工艺系统能耗的同时提高二氧化碳产品的性能指标,实现除杂后的CO2体积分数达到99.99％,获得高纯度食品级CO2,从而提高发酵气CO2回收利用的经济效益.

【Objective】The industrial scale of ethanol production from cassava by high ethanol producing strain of Saccharomyces cerevisiae Ygxas-49 was studied in this paper.【Methods】First,the batch fermentation tests were performed in 200 tfermentor to assess the variousfermentation indicators of the strain.Then a viable option was further enlarge in the annual120,000 tethanol production line to investigate the stability of the strain.Finally,the highconcentration ethanol production were performed in 200 tfermentor to assess the potential industrialization of the strain.【Results】Compared with control strain in 200 tfermentor,ethanol concentration of Ygxas-49 increased 8.92% with over 12 hdecrease on the fermentation time and same other fermented index.If the strain was used in the ethanol production,it can increase the ethanol concentration,reduce the fermentation time and increase the equipment utilization.Thereby,the cost of ethanol production could significantly reduce.The strain has stable operation of 30 din 120,000 tof ethanol production line.The results show that the ethanol concentration increased 5.35% and the fermentation time reduced more than 10 h.The ethanol concentration could reach 14.7%(V/V)after 52 hfermentation in 200 tfermenor.However,the current highest ethanol production from cassava reported in the literature was 13.5%(V/V)with 69 hof fermentation time.The ethanol concentration increased8.89% and the fermentation time reduced 17 hthan the report.【Conclusion】The strain of Ygxas-49 has the ability to be applied to industrial production,the fermented index was significantly better than the current domestic fermentation level.So it has a good prospects for industrial application in future.