School of Energy and Power Engineering, Energy and Environment International Centre, Beihang University, 37 Xueyuan Road, Haidian District, Beijing 100191, PR China.
School of Energy and Power Engineering, Energy and Environment International Centre, Beihang University, 37 Xueyuan Road, Haidian District, Beijing 100191, PR China.
Bioresour Technol. 2016 Dec;221:350-357. doi: 10.1016/j.biortech.2016.09.044. Epub 2016 Sep 13.
The aim of this work is to compare the life cycle assessments of low-N and normal culture conditions for a balance between the lipid content and specific productivity. In order to achieve the potential contribution of lipid content to the life cycle assessment, this study established relationships between lipid content (nitrogen effect) and specific productivity based on three microalgae strains including Chlorella, Isochrysis and Nannochloropsis. For microalgae-based aviation fuel, the effects of the lipid content on fossil fuel consumption and greenhouse gas (GHG) emissions are similar. The fossil fuel consumption (0.32-0.68MJ·MJMBAF) and GHG emissions (17.23-51.04gCOe·MJMBAF) increase (59.70-192.22%) with the increased lipid content. The total energy input decreases (2.13-3.08MJ·MJMBAF, 14.91-27.95%) with the increased lipid content. The LCA indicators increased (0-47.10%) with the decreased nitrogen recovery efficiency (75-50%).
本工作旨在比较低氮和正常培养条件下的生命周期评估，以平衡脂质含量和比生产力。为了实现脂质含量对生命周期评估的潜在贡献，本研究基于三种微藻（包括小球藻、等鞭金藻和盐藻）建立了脂质含量（氮效应）和比生产力之间的关系。对于基于微藻的航空燃料，脂质含量对化石燃料消耗和温室气体（GHG）排放的影响相似。随着脂质含量的增加，化石燃料消耗（0.32-0.68MJ·MJMBAF）和 GHG 排放（17.23-51.04gCOe·MJMBAF）增加（59.70-192.22%）。总能量投入随着脂质含量的增加而减少（2.13-3.08MJ·MJMBAF，14.91-27.95%）。随着氮回收效率（75-50%）的降低，LCA 指标增加（0-47.10%）。
