Interactive effect of indole-3-acetic acid and diethyl aminoethyl hexanoate on the growth and fatty acid content of some microalgae for biodiesel production. (1st December 2017)

• Record Type: Journal Article
• Authors: Salama, El-Sayed; Jeon, Byong-Hun; Chang, Soon Woong; Lee, Sang-hun; Roh, Hyun-Seog; Yang, Il-Seung; Kurade, Mayur B.; El-Dalatony, Marwa M.; Kim, Do-Hyeon; Kim, Ki-Hyun; Kim, Sunjoon
• Is Part Of: Journal of cleaner production. Volume 168(2017)
• Page Start: 1017
• Page End: 1024
• Publication Date: 2017-12-01
• Subjects: Microalgae -- Indole-3-acetic acid -- Diethyl aminoethyl hexanoate -- Fatty acids -- Biodiesel -- Phytohormone; Factory and trade waste -- Management -- Periodicals; Manufactures -- Environmental aspects -- Periodicals; Déchets industriels -- Gestion -- Périodiques; Usines -- Aspect de l'environnement -- Périodiques; 628.5
• DOI: 10.1016/j.jclepro.2017.09.057
• Languages: English
• ISSNs: 0959-6526

Abstract

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 10 −8 −10 −4 M. Combined phytohormones (10 −8 to 10 −5 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 × 10 6 cells mL −1 ) at 10 −8 M, O . multisporus (85.89 × 10 6 cells mL −1 ) at 10 −6 M, and C. vulgaris (4.09 × 10 6 cells mL −1 ) at 10 −5 M. Addition of 10 −7 M IAA and DAH also assisted the removal of Zn 2+ (97%), K + (88%) and Mg 2+ (99%) from the media by S . obliquus . The highest removal of Zn 2+, K +, and Mg 2+ by C . vulgaris was achieved at 10 −5 M IAA and DAH. Under all experimental conditions (10 −8 −10 −4 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. Highlights: IAA and DAH in the range of 10 −8 −10 −5 M enhanced the growth of algae. PUFAs was increased by growth in medium containing both IAA and DAH. Accumulated fatty acids in algae are suitable for production of high quality biodiesel.