A vertical integration simplified model for straw recovery as feedstock in sugarcane biorefineries
A vertical integration simplified model for straw recovery as feedstock in sugarcane biorefineries
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DOI：
10.1016/j.biombioe.2015.07.003
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发表时间：
2015-10-01
影响因子：
6
通讯作者：
Bonomi, A.
中科院分区：
文献类型：
--
作者：
Cardoso, T. F.;Chagas, M. F.;Bonomi, A.
机械化甘蔗绿色收获在巴西越来越多地被采用，增加了田间秸秆的可获得性。计算机辅助工具被用来预测秸秆回收系统的最佳条件。本研究旨在开发一种基于模型的甘蔗秸秆回收成本和内部收益率(IRR)的优化方法，该方法是甘蔗生产力、秸秆回收率和运输距离的函数，考虑了两个回收系统：整体收割(IS)和打包系统(BS)。本研究使用虚拟甘蔗生物精炼厂(VSB)的模拟程序，根据中央合成设计(CCD)。这些情景是基于一家自治的乙醇厂，该厂的碾磨能力为每年400万吨。通过这种方法评估了这些农业参数对甘蔗秸秆回收成本和内部收益率的影响，其中利用CCD建立了优化的经验模型，并对结果进行了统计评估。整体系统获得了最优的内部收益率(26.3%)、较低的运输距离(20公里)、最大的甘蔗秸秆生产力(100 t ha(-1))和最大的回收率(70%)。在相同条件下，打包系统的内部收益率较高(26.2%)。结果表明，信息系统能最大程度地降低秸秆回收成本中的农业成分，采用该系统可获得考虑甘蔗生物精炼厂垂直一体化的最优内部收益率。(C)2015爱思唯尔有限公司。保留所有权利。
Mechanized sugarcane green harvesting has been increasingly adopted in Brazil, rising straw availability at the field. Computer-aided tools are used to predict the optimum conditions for straw recovery systems. This study aims at developing a model-based method for optimization of sugarcane straw recovery costs and internal rate of return (IRR), as a function of sugarcane productivity, straw recovery fractions and transport distances considering two recovery systems: integral harvesting (IS) and baling system (BS). A simulation procedure using the Virtual Sugarcane Biorefinery (VSB), according to a Central Composite Design (CCD) is used in this study. The scenarios were based on an autonomous ethanol plant, with milling capacity of four million tons per year. The influence of these agricultural parameters on the sugarcane straw recovery costs and internal rate of return was evaluated through this approach, where the CCD was used for the development of an empirical model for optimization as well as a statistical evaluation of results. An optimized IRR (26.3%) was obtained for integral system, with low transport distance (20 km), maximum sugarcane stalk productivity (100 t ha(-1)) and maximum recovery fraction (70%). The same conditions lead to higher IRR (26.2%) for baling system. Results showed that the IS promotes the highest reduction of the agricultural components of straw recovery cost and the optimum IRR considering the vertical integration of sugarcane biorefineries was observed by adopting this system. (c) 2015 Elsevier Ltd. All rights reserved.