Economic assessment of microbial biodiesel production using heterotrophic yeasts
Economic assessment of microbial biodiesel production using heterotrophic yeasts
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DOI：
10.1080/15435075.2014.940957
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发表时间：
2016-01-01
影响因子：
3.3
通讯作者：
Graeff-Hoenninger, Simone
中科院分区：
文献类型：
--
作者：
Braunwald, Teresa;French, William Todd;Graeff-Hoenninger, Simone
利用产油微生物生产生物柴油被认为是生产真正可持续和可再生交通燃料的有前途的替代品。虽然这种方法的可行性已在实验室规模上得到证明，但由于经济限制，商业规模的实施迄今为止受到抑制。为了评估目前的成本状况，并制定建议，以减少生产相关的成本，一个简单的成本分析，建议的微生物石油生产过程中进行了。对于大规模发酵罐中的封闭发酵，计算出微生物油的盈亏平衡价格为2，350美元/吨。在敏感性分析的背景下，它表明，特别是资本成本的变化可以导致整体成本的降低。因此，设计了一种开放式池塘养殖方法，将设备成本降低了近一半，并将盈亏平衡价格降至1 723美元/吨。然而，这些减少是唯一可行的，当稳定的生物量和脂质产量可以确保在开放的池塘系统，因为敏感性分析确定这些产量参数的主要因素影响的盈亏平衡价格。即使在非常乐观的假设下，也不可能将盈亏平衡价格降低到传统植物油作为竞争产品的价格以下。因此，该方法的经济可行性可能只有在一方面进行相当大的技术开发和生产方法的效率改进，而另一方面设备和原油价格不断提高的情况下才可能出现。
The production of biodiesel using oleaginous microorganisms is investigated as promising alternative to produce a truly sustainable and renewable transportation fuel. While the feasibility of this approach has been shown on the laboratory scale, a commercial scale implementation is to date inhibited due to economic restraints. In order to evaluate the current cost situation and to develop suggestions to reduce production related costs, a simple cost analysis of the proposed microbial oil production process has been carried out. For closed fermentation in large-scale fermenters a break-even price of 2,350 US$ t(-1) for microbial oil was calculated. In the context of a sensitivity analysis it was shown that especially alterations in capital cost can lead to overall cost reductions. Accordingly, an open pond cultivation approach was designed, cutting the cost for equipment almost in half and decreasing the break-even price to 1,723 US$ t(-1). However, these reductions are only feasible when stable biomass and lipid yields can be ensured in open-pond systems, because the sensitivity analysis identified these yield parameters as leading factors influencing the break-even price. Even under very optimistic assumptions, it was not possible to reduce the break-even price below that of conventional plant oils as competitive products. Therefore, economic feasibility of the process will probably only occur if on one hand considerable technical development and efficiency improvements of the production process are made while on the other hand plant and crude oil prices are continuously increasing.