Gupta, Suvidha and Pawar, Sanjay B. and Pandey, R. A. and Kanade, Gajanan S. and Lokhande, Satish K. (2019) Outdoor microalgae cultivation in airlift photobioreactor at high irradiance and temperature conditions: effect of batch and fed-batch strategies, photoinhibition, and temperature stress. Bioprocess and Biosystems Engineering, 42 (2). pp. 331-344. ISSN 1615-7591, ESSN: 1615-7605

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Abstract

The microalgae Scenedesmus abundans cultivated in five identical airlift photobioreactors (PBRs) in batch and fed-batch modes at the outdoor tropical condition. The microalgae strain S. abundans was found to tolerate high temperature (35–45 °C) and high light intensity (770–1690 μmol m− 2 s− 1). The highest biomass productivities were 152.5–162.5 mg L− 1 day− 1 for fed-batch strategy. The biomass productivity was drastically reduced due to photoinhibition effect at a culture temperature of > 45 °C. The lipid compositions showed fatty acids mainly in the form of saturated and monounsaturated fatty acids (> 80%) in all PBRs with Cetane number more than 51. The fed-batch strategies efficiently produced higher biomass and lipid productivities at harsh outdoor conditions. Furthermore, the microalgae also accumulated omega-3 fatty acid (C18:3) up to 14% (w/w) of total fatty acid at given outdoor condition.

Item Type:	Article
Uncontrolled Keywords:	Dark Respiration; Biodiesel; Mixotrophic Cultivation; Airlift Photobioreactor; Fed-batch Strategy
Subjects:	Microbiology
Divisions:	UNSPECIFIED
Depositing User:	Mr. RK Lohiya
Date Deposited:	03 Apr 2019 05:09
Last Modified:	03 Apr 2019 05:09
URI:	http://neeri.csircentral.net/id/eprint/1223

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