微藻生物柴油生产的生命周期评估：采用混合培养系统。
Life cycle assessment on microalgal biodiesel production using a hybrid cultivation system.
机构信息
Department of Engineering, University of Cambridge, Trumpington Street, Cambridge CB2 1PZ, United Kingdom.
Department of Hydraulic, Maritime and Environmental Engineering, Universitat Politècnica de Catalunya, BarcelonaTech, E-08034 Barcelona, Spain.
出版信息
Bioresour Technol. 2014 Jul;163:343-55. doi: 10.1016/j.biortech.2014.04.051. Epub 2014 Apr 26.
A life cycle assessment (LCA) was performed on a putative biodiesel production plant in which the freshwater alga Chlorella vulgaris, was grown using an existing system similar to a published commercial-scale hybrid cultivation. The hybrid system couples airlift tubular photobioreactors with raceway ponds in a two-stage process for high biomass growth and lipid accumulation. The results show that microalgal biodiesel production would have a significantly lower environmental impact than fossil-derived diesel. Based on the functional unit of 1 ton of biodiesel produced, the hybrid cultivation system and hypothetical downstream process (base case) would have 42% and 38% savings in global warming potential (GWP) and fossil-energy requirements (FER) when compared to fossil-derived diesel, respectively. Sensitivity analysis was performed to identify the most influential process parameters on the LCA results. The maximum reduction in GWP and FER was observed under mixotrophic growth conditions with savings of 76% and 75% when compared to conventional diesel, respectively.
对一个假定的生物柴油生产工厂进行了生命周期评估（LCA），其中使用类似于已发表的商业规模混合培养的现有系统来培养淡水藻类小球藻。混合系统将气升式管式光生物反应器与跑道池耦合在一个两阶段过程中，以实现高生物质生长和脂质积累。结果表明，微藻生物柴油的生产将比化石衍生的柴油具有显著更低的环境影响。基于生产 1 吨生物柴油的功能单位，与化石衍生的柴油相比，混合培养系统和假设的下游工艺（基础情况）在全球变暖潜力（GWP）和化石能源需求（FER）方面分别节省 42%和 38%。进行了敏感性分析以确定对 LCA 结果影响最大的过程参数。在混合营养生长条件下，GWP 和 FER 的最大减少量分别为 76%和 75%，与传统柴油相比。
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