Microalgae to biofuels: Life cycle impacts of methane production of anaerobically digested lipid extracted algae

作者：Quinn Jason C^*; Hanif Asma; Sharvelle Sybil; Bradley Thomas H

来源：Bioresource Technology, 2014, 171: 37-43.

DOI：10.1016/j.biortech.2014.08.037

• Anaerobic digestion
• Biofuel
• Life cycle assessment
• Lipid extracted algae
• Nannochloropsis salina

This study presents experimental measurements of the biochemical methane production for whole and lipid extracted Nannochloropsis salina. Results show whole microalgae produced 430 cm(3)-CH4 g-volatile solids(-1) (g-VS) (sigma = 60), 3 times more methane than was produced by the LEA, 140 cm(3)-CH4 g-VS-1 (sigma = 30). Results illustrate current anaerobic modeling efforts in microalgae to biofuel assessments are not reflecting the impact of lipid removal. On a systems level, the overestimation of methane production is shown to positively skew the environmental impact of the microalgae to biofuels process. Discussion focuses on a comparison results to those of previous anaerobic digestion studies and quantifies the corresponding change in greenhouse gas emissions of the microalgae to biofuels process based on results from this study.

• 出版日期2014-11