Advancement of Abiotic Stresses for Microalgal Lipid Production and Its Bioprospecting into Sustainable Biofuels

Rahul Prasad Singh, Priya Yadav, Indrajeet Kumar, Manoj Kumar Solanki, Rajib Roychowdhury, Ajay Kumar () and Rajan Kumar Gupta ()
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Rahul Prasad Singh: Laboratory of Algal Research, Centre of Advanced Study in Botany Institute of Science, Banaras Hindu University, Varanasi 221005, India
Priya Yadav: Laboratory of Algal Research, Centre of Advanced Study in Botany Institute of Science, Banaras Hindu University, Varanasi 221005, India
Indrajeet Kumar: Department of Botany, Government Degree College Pawanikala, Sonbhadra 231213, India
Manoj Kumar Solanki: Department of Life Sciences and Biological Sciences, I.E.S. University, Bhopal 462044, India
Rajib Roychowdhury: Department of Plant Pathology and Weed Research, Institute of Plant Protection, Agricultural Research Organization (ARO)—The Volcani Institute, Rishon Lezion 7505101, Israel
Ajay Kumar: Amity Institute of Biotechnology, Amity University, Noida 201303, India
Rajan Kumar Gupta: Laboratory of Algal Research, Centre of Advanced Study in Botany Institute of Science, Banaras Hindu University, Varanasi 221005, India

Sustainability, 2023, vol. 15, issue 18, 1-36

Abstract: The world is currently facing global energy crises and escalating environmental pollution, which are caused by the extensive exploitation of conventional energy sources. The limited availability of conventional energy sources has opened the door to the search for alternative energy sources. In this regard, microalgae have emerged as a promising substitute for conventional energy sources due to their high photosynthetic rate, high carbohydrate and lipid content, efficient CO 2 fixation capacity, and ability to thrive in adverse environments. The research and development of microalgal-based biofuel as a clean and sustainable alternative energy source has been ongoing for many years, but it has not yet been widely adopted commercially. However, it is currently gaining greater attention due to the integrated biorefinery concept. This study provides an in-depth review of recent advances in microalgae cultivation techniques and explores methods for increasing lipid production by manipulating environmental factors. Furthermore, our discussions have covered high lipid content microalgal species, harvesting methods, biorefinery concepts, process optimizing software tools, and the accumulation of triglycerides in lipid droplets. The study additionally explores the influence of abiotic stresses on the response of biosynthetic genes involved in lipid synthesis and metabolism. In conclusion, algae-based biofuels offer a viable alternative to traditional fuels for meeting the growing demand for energy.

Keywords: microalgae; cultivation systems; biomass; environmental stresses; biorefinery; biofuels (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
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