The environmental sustainability of the microalgae Nannochloropsis oceanica cultivation for total fatty acid (TFA) production was analyzed using life cycle assessment (LCA). Pilot data provided by the plant operator from cultivation in Italy using Green Wall Panel (GWP®) photobioreactors were upscaled to a 20-ha production process, and an LCA was conducted and assessed for the Italian regions of Tuscany and Sicily. Two additional scenarios were modelled to analyze the influence of more sustainable framework conditions, respectively nutrient recycling and renewable energy supply. The results show that environmental impacts per functional unit are around 15% less at the site with optimal growth conditions. Between 60 and 80% of the impacts are due to the energy demand during plant operation, infrastructure, and nutrient demand. Nutrient recycling and the gain of an energy credit from the separated biocrude with the hydrothermal liquefaction (HTL) process reduce the environmental impacts in all six International Reference Life Cycle Data System (ILCD) impact categories by an average of 11% compared to a scenario without nutrient recycling. The additional consideration of a renewable energy supply allows for an average reduction of 36% and together with the nutrient recycling of an average of 45% for the global warming potential (GWP) and most of the other impact categories.

微藻Nannochloropsis Oceanica的环境可持续性使用生命周期评估 (LCA) 分析了总脂肪酸 (TFA) 产量的培养。工厂运营商提供的使用绿墙板 (GWP®) 光生物反应器在意大利种植的试点数据被放大到 20 公顷的生产过程，并对意大利托斯卡纳和西西里地区进行了 LCA 评估。对两个额外的场景进行了建模，以分析更可持续的框架条件的影响，分别是养分循环和可再生能源供应。结果表明，在具有最佳生长条件的地点，每个功能单元的环境影响减少了约 15%。60% 到 80% 的影响是由工厂运营期间的能源需求、基础设施和养分需求引起的。与不使用水热液化 (HTL) 过程的分离生物原油的营养回收和能源信用相比，所有六个国际参考生命周期数据系统 (ILCD) 影响类别中的环境影响平均减少 11%。养分循环。对可再生能源供应的额外考虑使得全球变暖潜能值 (GWP) 和大多数其他影响类别平均减少 36%，同时养分循环平均减少 45%。