Comparative economic assessment of ABE fermentation based on cellulosic and non-cellulosic feedstocks
Comparative economic assessment of ABE fermentation based on cellulosic and non-cellulosic feedstocks
复制标题
DOI：
10.1016/j.apenergy.2011.12.079
复制
发表时间：
2012-05-01
期刊：
影响因子：
11.2
通讯作者：
Gayen, Kalyan
中科院分区：
文献类型：
--
作者：
Kumar, Manish;Goyal, Yogesh;Gayen, Kalyan
在不久的将来，生物丁醇有可能成为石油汽油的替代品。然而，由于无法获得廉价的原料，生产抑制和低效的产品回收过程，从ABE发酵生产生物丁醇的经济可行性受到影响。在这里，基于纤维素（甘蔗渣、大麦秸秆、小麦秸秆、玉米秸秆和柳枝稷）和非纤维素（葡萄糖、甘蔗、玉米和西米）原料进行了ABE发酵的经济分析，这些原料在以农业为基础的国家广泛而廉价地获得。分析表明，每年生产1万吨丁醇，利用葡萄糖所需的总固定资本成本比其他纤维素和非纤维素原料低37%。然而，由于葡萄糖成本高，从葡萄糖中生产丁醇的成本比甘蔗和纤维素材料高出四倍。西米的成本对丁醇生产成本的影响是其他原料的三倍。因此，这两种底物使得生物丁醇生产在经济上远远不可行。有趣的是，甘蔗和纤维素材料显示适合经济可行的丁醇生产，生产成本范围为每公斤丁醇0.59- 0.75美元。因此，设计和工艺参数的定量变化，即发酵罐尺寸、工厂产能、以甘蔗和纤维素材料为原料的产量，可以显著降低丁醇的单位成本，分别可降低53%、19%和31%。因此，这些参数将在从更便宜的原料（甘蔗和纤维素材料）生产丁醇方面发挥重要作用。此外，产品产量对生产成本的高敏感性要求对丁醇生产细菌的基因组进行重大操作，以提高ABE发酵的产量。(c) 2012 Elsevier Ltd.版权所有。
Biobutanol can become the replacement of petroleum gasoline in near future. However, economic feasibility of biobutanol production from ABE fermentation is suffering due to the unavailability of cheap feedstocks, production inhibition and inefficient product recovery processes. Here, economic analysis of ABE fermentation has been performed based on cellulosic (bagasse, barley straw, wheat straw, corn stover, and switchgrass) and non-cellulosic (glucose, sugarcane, corn, and sago) feedstocks, which are widely and cheaply available in agriculture based countries. Analysis shows that utilization of glucose required 37% lesser total fixed capital cost than the other cellulosic and non-cellulosic feedstocks for the per year production of 10,000 tonnes of butanol. However, the production cost of butanol from glucose was fourfold higher than sugarcane and cellulosic materials because of its (glucose) high cost. The cost of sago also affected threefold production cost of butanol comparative to other feedstocks. Therefore, these two substrates turned the biobutanol production far from being economically feasible. Interestingly, sugarcane and cellulosic materials showed suitability for economically feasible production of butanol with the production cost range of $0.59-$0.75 per kg butanol. Consequently, quantitative variation in the design and process parameters namely fermentor size, plant capacity, production yield using sugarcane and cellulosic materials as raw materials, trigger significant reduction in unitary cost of butanol up to 53%, 19%, and 31% respectively. Therefore, these parameters will play significant role in making the butanol production economical from cheaper feedstocks (sugarcane and cellulosic materials). Further, high sensitivity of production cost from the product yield postulates significant manipulation in genome of butanol producing bacteria for improving the yield of ABE fermentation. (c) 2012 Elsevier Ltd. All rights reserved.