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Improvement of the potential of Dunaliella tertiolecta as a source of biodiesel by auxin treatment coupled to salt stress

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  • El Arroussi, Hicham
  • Benhima, Redouane
  • Bennis, Iman
  • El Mernissi, Najib
  • Wahby, Imane

Abstract

Increased world demand for energy and decrease of petroleum reserves have focused worldwide efforts to develop new and renewable energy sources. Liquid microalgal biofuels such as biodiesel represent a sustainable alternative to fossil energy besides being environmentally friendly. However, optimization of culture conditions to maximize productivity (biomass and lipid) is still a great challenge for a commercial biodiesel production. This is due to the difference between optimal culture conditions required for biomass and lipid accumulation. The current study proposes a two-phase method allowing both biomass and lipid increase in Dunaliella tertiolecta. The used this method consists of a first phase when microalgae were cultivated in presence of 2,4-Dichlorophenoxyacetic acid (2,4-D) to enhance algal division and growth. Later, at the end of log-phase, culture conditions were modified by adding NaCl to suddenly increase the salinity from 0.5 M to 2 M. Results showed that combination of auxin with salt stress resulted in a considerable improvement both in growth and lipid production in D. tertiolecta. During the first phase auxin addition improved biomass accumulation by 40% and salt stress in the second phase led to lipid increase from 24% to 70% with the optimal concentrations combination of auxin and NaCl.

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  • El Arroussi, Hicham & Benhima, Redouane & Bennis, Iman & El Mernissi, Najib & Wahby, Imane, 2015. "Improvement of the potential of Dunaliella tertiolecta as a source of biodiesel by auxin treatment coupled to salt stress," Renewable Energy, Elsevier, vol. 77(C), pages 15-19.
    • Handle: RePEc:eee:renene:v:77:y:2015:i:c:p:15-19
    DOI: 10.1016/j.renene.2014.12.010
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    References listed on IDEAS

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    1. Das, Probir & Aziz, Siti Sarah & Obbard, Jeffrey Philip, 2011. "Two phase microalgae growth in the open system for enhanced lipid productivity," Renewable Energy, Elsevier, vol. 36(9), pages 2524-2528.
    2. Gao, Chunfang & Zhai, Yan & Ding, Yi & Wu, Qingyu, 2010. "Application of sweet sorghum for biodiesel production by heterotrophic microalga Chlorella protothecoides," Applied Energy, Elsevier, vol. 87(3), pages 756-761, March.
    3. Tang, Haiying & Abunasser, Nadia & Garcia, M.E.D. & Chen, Meng & Simon Ng, K.Y. & Salley, Steven O., 2011. "Potential of microalgae oil from Dunaliella tertiolecta as a feedstock for biodiesel," Applied Energy, Elsevier, vol. 88(10), pages 3324-3330.
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    2. Jawaharraj, Kalimuthu & Karpagam, Rathinasamy & Ashokkumar, Balasubramaniem & Pratheeba, Chanda Nagarajan & Varalakshmi, Perumal, 2016. "Enhancement of biodiesel potential in cyanobacteria: using agro-industrial wastes for fuel production, properties and acetyl CoA carboxylase D (accD) gene expression of Synechocystis sp.NN," Renewable Energy, Elsevier, vol. 98(C), pages 72-77.
    3. Sajjadi, Baharak & Chen, Wei-Yin & Raman, Abdul. Aziz. Abdul & Ibrahim, Shaliza, 2018. "Microalgae lipid and biomass for biofuel production: A comprehensive review on lipid enhancement strategies and their effects on fatty acid composition," Renewable and Sustainable Energy Reviews, Elsevier, vol. 97(C), pages 200-232.
    4. Małgorzata Hawrot-Paw & Patryk Ratomski & Adam Koniuszy & Wojciech Golimowski & Mirosława Teleszko & Anna Grygier, 2021. "Fatty Acid Profile of Microalgal Oils as a Criterion for Selection of the Best Feedstock for Biodiesel Production," Energies, MDPI, vol. 14(21), pages 1-14, November.
    5. El Arroussi, Hicham & Benhima, Redouane & El Mernissi, Najib & Bouhfid, Rachid & Tilsaghani, Chakib & Bennis, Iman & Wahby, Imane, 2017. "Screening of marine microalgae strains from Moroccan coasts for biodiesel production," Renewable Energy, Elsevier, vol. 113(C), pages 1515-1522.
    6. Hao Chen & Yuye Jiang & Kai Zhu & Jingwen Yang & Yanxia Fu & Shuang Wang, 2023. "A Review on Industrial CO 2 Capture through Microalgae Regulated by Phytohormones and Cultivation Processes," Energies, MDPI, vol. 16(2), pages 1-17, January.
    7. Anahas, Antonyraj Matharasi Perianaika & Muralitharan, Gangatharan, 2019. "Central composite design (CCD) optimization of phytohormones supplementation for enhanced cyanobacterial biodiesel production," Renewable Energy, Elsevier, vol. 130(C), pages 749-761.

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