Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5479865 | Journal of Cleaner Production | 2017 | 26 Pages |
Abstract
Enhancement of microalgal growth and fatty acid production is essential for development of a microalgae-based biodiesel production platform. Three different microalgal species (Scenedesmus obliquus GU732418, Ourococcus multisporus GU732424 and Chlorella vulgaris FR751187) were individually cultivated in media containing both indole-3-acetic acid (IAA) and diethyl aminoethyl hexanoate (DAH) at concentrations of 10â8â10â4 M. Combined phytohormones (10â8 to 10â5 M) increased the growth of all three species compared to growth in media without phytohormones. IAA and DAH supported the maximum growth of S. obliquusi (38.12 Ã 106 cells mLâ1) at 10â8 M, O. multisporus (85.89 Ã 106 cells mLâ1) at 10â6 M, and C. vulgaris (4.09 Ã 106 cells mLâ1) at 10â5 M. Addition of 10â7 M IAA and DAH also assisted the removal of Zn2+ (97%), K+ (88%) and Mg2+ (99%) from the media by S. obliquus. The highest removal of Zn2+, K+, and Mg2+ by C. vulgaris was achieved at 10â5 M IAA and DAH. Under all experimental conditions (10â8â10â4 M IAA and DAH) the amounts of poly-unsaturated fatty acids were significantly increased. Palmitic acid, linoleic acid and γ-linolenic acid were the major fatty acids, accounting for 11.75-21.55%, 2.55-6.73%, and 52.93-75.89% of the total fatty acid content, respectively. The fatty acids that accumulated in O. multisporus and C. vulgaris were found to be suitable for production of high quality biodiesel with characteristics equivalent to crop seed oil-derived biodiesel.
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Authors
El-Sayed Salama, Byong-Hun Jeon, Soon Woong Chang, Sang-hun Lee, Hyun-Seog Roh, Il-Seung Yang, Mayur B. Kurade, Marwa M. El-Dalatony, Do-Hyeon Kim, Ki-Hyun Kim, Sunjoon Kim,