TY - JOUR
T1 - Hydrothermal liquefaction of Spirulina and Nannochloropsis Salina under subcritical and supercritical water conditions
AU - Toor, Saqib
AU - Reddy, H.
AU - Deng, S.
AU - Hoffmann, Jessica
AU - Spangsmark, D.
AU - Madsen, L. B.
AU - Holm-Nielsen, Jens Bo
AU - Rosendahl, Lasse
PY - 2013
Y1 - 2013
N2 - 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 Nannochloropsis salina at 350 °C and 175 bar. For Spirulina platensis algae sample, the optimal hydrothermal liquefaction condition appears to be at 310 °C and 115 bar, while the optimal condition for Nannochloropsis 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.
AB - 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 Nannochloropsis salina at 350 °C and 175 bar. For Spirulina platensis algae sample, the optimal hydrothermal liquefaction condition appears to be at 310 °C and 115 bar, while the optimal condition for Nannochloropsis 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.
KW - Hydrothermal liquefaction
KW - Subcritical water
KW - Algal biofuel
KW - Nannochloropsis salina
KW - Spirulina
U2 - 10.1016/j.biortech.2012.12.144
DO - 10.1016/j.biortech.2012.12.144
M3 - Journal article
SN - 0960-8524
VL - 131
SP - 413
EP - 419
JO - Bioresource Technology
JF - Bioresource Technology
ER -