Department of Energy Technology, Aalborg University, DK-9220 Aalborg, Denmark.
Bioresour Technol. 2013 Mar;131:413-9. doi: 10.1016/j.biortech.2012.12.144. Epub 2013 Jan 10.
Six hydrothermal liquefaction experiments on Nannochloropsis salina and Spirulina platensis at subcritical and supercritical water conditions (220–375 °C, 20–255 bar) were carried out to explore the feasibility of extracting lipids from wet algae, preserving nutrients in lipid-extracted algae solid residue, and recycling process water for algae cultivation. GC–MS, elemental analyzer, FT-IR, calorimeter and nutrient analysis were used to analyze bio-crude, lipid-extracted algae and water samples produced in the hydrothermal liquefaction process. The highest bio-crude yield of 46% was obtained on N. salina at 350 °C and 175 bar. For S. platensis algae sample, the optimal hydrothermal liquefaction condition appears to be at 310 °C and 115 bar, while the optimal condition for N. salina is at 350 °C and 175 bar. Preliminary data also indicate that a lipid-extracted algae solid residue sample obtained in the hydrothermal liquefaction process contains a high level of proteins.
进行了六次在亚临界和超临界水条件（220-375°C，20-255 巴）下对盐藻和螺旋藻的水热液化实验，以探索从湿藻中提取脂质、在提取脂质后的藻固体残渣中保存营养物质以及回收工艺水用于藻类培养的可行性。GC-MS、元素分析仪、FT-IR、量热仪和营养分析用于分析水热液化过程中产生的生物原油、提取脂质后的藻类和水样。在 350°C 和 175 巴下，盐藻的生物原油产率最高，达到 46%。对于螺旋藻藻类样品，水热液化的最佳条件似乎在 310°C 和 115 巴，而盐藻的最佳条件在 350°C 和 175 巴。初步数据还表明，水热液化过程中获得的提取脂质后的藻固体残渣样品含有高水平的蛋白质。
