期刊
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
卷 16, 期 4, 页码 7707-7722出版社
MDPI
DOI: 10.3390/ijms16047707
关键词
microalga; cell disruption; ultrasonication; high pressure homogenization; enzymatic lyses
资金
- National Key Technology R&D Program of the 12th Five-year Plan of China [2011BAD14B03-06]
- Provincial International Science and Technology Cooperation Project of Guangdong Province, China [2011B050400027]
Microalgal biodiesel is one of the most promising renewable fuels. The wet technique for lipids extraction has advantages over the dry method, such as energy-saving and shorter procedure. The cell disruption is a key factor in wet oil extraction to facilitate the intracellular oil release. Ultrasonication, high-pressure homogenization, enzymatic hydrolysis and the combination of enzymatic hydrolysis with high-pressure homogenization and ultrasonication were employed in this study to disrupt the cells of the microalga Neochloris oleoabundans. The cell disruption degree was investigated. The cell morphology before and after disruption was assessed with scanning and transmission electron microscopy. The energy requirements and the operation cost for wet cell disruption were also estimated. The highest disruption degree, up to 95.41%, assessed by accounting method was achieved by the combination of enzymatic hydrolysis and high-pressure homogenization. A lipid recovery of 92.6% was also obtained by the combined process. The combined process was found to be more efficient and economical compared with the individual process.
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