Journal
APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
Volume 190, Issue 4, Pages 1304-1318Publisher
SPRINGER
DOI: 10.1007/s12010-019-03167-y
Keywords
Astaxanthin; Nano-dispersion; Oil partitioning; Acetone extraction; Carbon dioxide reduction
Funding
- Global Infrastructure Program through the National Research Foundation of Korea (NRF) - Ministry of Science and ICT [NRF-2018K1A3A1A61024274]
- Energy Efficiency and Resources R&D project through the Korea Institute of Energy Technology Evaluation and Planning (KETEP)
- Ministry of Knowledge Economy (MKE) of Korea [20152010201900]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20152010201900] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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The feasibilities of cell disruption by homogenization-assisted high-pressure nano-dispersion and recovery of astaxanthin-containing oil by oil partitioning in oil-acetone-water solution were examined. The total fatty acid content of Haematococcus pluvialis was 414.6 mg/g cell, and the astaxanthin content was 4.4% of oil. Extra oil was added to the solution in order to recover oil through instability of dispersion status instead of solvent evaporation. A total amount of energy of 0.34 kWh/L was consumed for acetone evaporation at 50 degrees C, whereas fully 1.86 kWh/L of energy for water evaporation was consumed. When soybean oil was added to the solution after partial acetone evaporation, the oil-recovery yield was 97.8%, while the yield after full evaporation was 97.6% in 10-g/L solution. However, the energy consumed for partial evaporation (0.29 kWh/L) was much lower than that for full evaporation (0.40 kWh/L). When H. pluvialis oil was added to the solution after partial evaporation, the oil-recovery yield decreased to 90.6% due to the impurity of crude H. pluvialis oil in 10-g/L solution. Methods such as refining of H. pluvialis oil, increase of microalgae dosage for cell disruption, and increase of the injection amount of extra oil can help to enhance oil recovery.
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