Department of Agricultural and Biological Engineering, University of Illinois at Urbana-Champaign, 376C Agricultural Engineering Sciences Building, MC-644, 1304 West Pennsylvania Avenue, Urbana, IL 61801, United States.
Bioresour Technol. 2010 Jul;101(14):5282-9. doi: 10.1016/j.biortech.2010.01.140. Epub 2010 Mar 6.
An engineering economic model, which is mass balanced and compositionally driven, was developed to compare the conventional corn dry-grind process and the pre-fractionation process called quick germ-quick fiber (QQ). In this model, documented in a companion article, the distillers dried grains with solubles (DDGS) price was linked with its protein and fiber content as well as with the long-term average relationship with the corn price. The detailed economic analysis showed that the QQ plant retrofitted from conventional dry-grind ethanol plant reduces the manufacturing cost of ethanol by 13.5 cent/gallon and has net present value of nearly $4 million greater than the conventional dry-grind plant at an interest rate of 4% in 15years. Ethanol and feedstock price sensitivity analysis showed that the QQ plant gains more profits when ethanol price increases than conventional dry-grind ethanol plant. An optimistic analysis of the QQ process suggests that the greater value of the modified DDGS would provide greater resistance to fluctuations in corn price for QQ facilities. This model can be used to provide decision support for ethanol producers.
建立了一个工程经济模型，该模型基于质量平衡和组成驱动，用于比较传统的玉米干法磨浆工艺和称为快速胚芽-快速纤维（QQ）的预分离工艺。在这个模型中，如一篇相关文章中所记录的，酒糟蛋白饲料（DDGS）的价格与其蛋白质和纤维含量以及与玉米价格的长期平均关系有关。详细的经济分析表明，从传统干法磨浆乙醇工厂改造的 QQ 工厂每加仑乙醇的制造成本降低了 13.5 美分，并且在 15 年内以 4%的利率计算，其净现值比传统干法磨浆工厂高出近 400 万美元。乙醇和原料价格敏感性分析表明，QQ 工厂在乙醇价格上涨时获得的利润高于传统的干法磨浆乙醇工厂。对 QQ 工艺的乐观分析表明，改良的 DDGS 的更高价值将为 QQ 工厂提供更大的玉米价格波动抵抗力。该模型可用于为乙醇生产商提供决策支持。
