Journal
BIORESOURCE TECHNOLOGY
Volume 169, Issue -, Pages 328-335Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2014.06.017
Keywords
Microalgae; Biodiesel; Nisargruna biogas effluent; 18S-23S rRNA; Lipids
Funding
- Department of Atomic Energy, Gov. of India
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Increasing energy demand and depleting fossil fuel sources have intensified the focus on biofuel production. Microalgae have emerged as a desirable source for biofuel production because of high biomass and lipid production from waste water source. In this study, five microalgae were isolated from effluents of Nisargruna biogas plants. These isolates were identified based on morphology and partial 18S and 23S rRNA gene sequences. Growth and lipid accumulation potential of these microalgae were investigated. One isolate, Chlorella sp. KMN3, accumulated high biomass (1.59 +/- 0.05 g L-1) with moderate lipid content (20%), while another isolate Monoraphidium sp. KMN5 showed moderate biomass accumulation of 0.65 +/- 0.05 g L-1 with a very high (35%) lipid content. The fatty acid methyl esters mainly composed of C-16:0, C-18:0, C-18:1 and C-18:2. This observation makes these microalgae immensely potential candidate for biodiesel production using the effluent of a biogas plant as feed stock. (C) 2014 Elsevier Ltd. All rights reserved.
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