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Studies on Microalgae for Biodiesel production

KrishiKosh

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Title Studies on Microalgae for Biodiesel production
 
Creator VarshaRani.H.
 
Contributor Geeta.G.Shirnalli
 
Subject Agribusiness Management
 
Description The increase in air pollution, depletion in the fossil fuels and ever increase in their
price have led to search for alternate fuels. Among the renewable sources, microalgae could
be one of the best alternates. Microalgae have higher potential to produce biodiesel. Hence,
the present study was conducted. Seventeen isolates of microalgae were isolated from various
water samples from lakes and tested for lipid production under fluorescent microscope using
Nile red stain. The reference strains used in the study were Botryococcus braunii and
Neochloris oleoabundans. Among the isolates Botryococcus sp. (B6) and Scenedesmus
dimorphus (SD7) showed maximum fluorescence indicating potential strains for lipid
production.
The highest biomass was produced by Botryococcus braunii (7.90 mg ml-1) followed
by Scenedesmus dimorphus (SD7) (4.53 mg ml-1), Botryococcus sp. (B6) (3.56 mg ml-1) and
Neochloris oleoabundans (3.46 mg ml-1). The lipid production was 5.33 mg ml-1, 2.53 mg ml-
1, 2.26 mg ml-1 and 1.42 mg ml-1respectively.
These strains were grown in the different concentrations of Ferric ammonium citrate
(FAC) and Sodium nitrate to study their effect on biomass and lipid production. Different
FAC levels tested were 10.7 μM, 21.4 μM and 42.8 μM. Sodium nitrate used in the study
were 8.5 mM L-1, 17 mM L-1 and 34 mM L-1. FAC level of 42.8 μM and Sodium nitrate level
of 8.5 mM L-1 were optimum for biomass and lipid production. The combined effect of the
FAC at 42.8 μM and Sodium nitrate at 8.5 mM L-1 showed maximum biomass and lipid
production by the microalgal strains as compared to that of standard medium. From this
study, B6 and SD7 isolate of microalgae were potential and can be further used for large
scale production and lipid extraction for converting to biodiesel.
 
Date 2016-11-07T19:00:25Z
2016-11-07T19:00:25Z
2010
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/84316
 
Format application/pdf
 
Publisher UAS, Dharwad