CEA, Direction de la Recherche Technologique, Laboratoire des Technologies de la Biomasse, CEA Cadarache, Saint-Paul-lez-Durance F-13108, France.
Bioresour Technol. 2013 May;136:205-12. doi: 10.1016/j.biortech.2013.02.091. Epub 2013 Mar 4.
In view of the increasing demand for bioenergy, in this study, the techno-economic viabilities for three emerging pathways to microalgal biofuel production have been evaluated. The three processes evaluated are the hydrothermal liquefaction (HTL), oil secretion and alkane secretion. These three routes differ in their lipid extraction procedure and the end-products produced. This analysis showed that these three processes showed various advantages: possibility to convert the defatted microalgae into bio-crude via HTL thus increasing the total biodiesel yield; better energetic and environmental performance for oil secretion and an even increased net energy ratio (NER) for alkane secretion. However, great technological breakthroughs are needed before planning any scale-up strategy such as continuous wet biomass processing and heat exchange optimization for the HTL pathway and effective and sustainable excretion for both secretion pathways.
鉴于生物能源需求的不断增长，本研究评估了三种新兴微藻生物燃料生产途径的技术经济可行性。评估的三个过程是水热液化（HTL）、油脂分泌和烷烃分泌。这三种途径在其脂质提取过程和产生的最终产物上有所不同。分析表明，这三种工艺具有各自的优势：通过 HTL 将脱脂微藻转化为生物原油，从而提高总生物柴油产量；油脂分泌具有更好的能量和环境性能，烷烃分泌的净能量比（NER）甚至更高。然而，在规划任何规模化战略之前，例如连续的湿生物质处理和 HTL 途径的热交换优化，以及两种分泌途径的有效和可持续排泄，都需要重大的技术突破。
