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Evaluation of indigenous fresh water microalga Scenedesmus obtusus for feed and fuel applications: Effect of carbon dioxide, light and nutrient sources on growth and biochemical characteristics
- Source :
- Bioresource technology. 207
- Publication Year :
- 2015
-
Abstract
- Scenedesmus obtusus, a freshwater microalga, was evaluated for its growth and biochemical characteristics under various culture conditions. S. obtusus was tolerant at all tested CO2 concentrations up to 20%. Among the different nitrogen sources, urea showed enhanced biomass productivities up to 2-fold compared to control, where the nitrogen source was sodium nitrate. Light intensity and photoperiod had a significant effect on growth rate and biomass productivity. The growth rate was observed maximum under continuous light exposure at the light intensities, 30μmolm(-2)sec(-1) and 60μmolm(-2)sec(-1) The species was able to tolerate the salinity levels up to 25mM NaCl, where, the increase in the concentration of NaCl suppressed the growth. Ammonium acetate and glycine showed better growth rate and biomass productivity indicating mixotrophic ability of S. obtusus. Supplementation of acetate and bicarbonate significantly enhanced the biomass productivity. Biodiesel properties of S. obtusus cultivated at various culture conditions were estimated.
- Subjects :
- 0106 biological sciences
Salinity
Environmental Engineering
Light
Nitrogen
Photoperiod
Glycine
Biomass
Bioengineering
010501 environmental sciences
Acetates
01 natural sciences
chemistry.chemical_compound
Nutrient
010608 biotechnology
Botany
Microalgae
Food science
Waste Management and Disposal
Scenedesmus
0105 earth and related environmental sciences
biology
Renewable Energy, Sustainability and the Environment
food and beverages
General Medicine
Carbon Dioxide
biology.organism_classification
Culture Media
Light intensity
Bicarbonates
chemistry
Productivity (ecology)
Biofuels
Carbon dioxide
Mixotroph
Subjects
Details
- ISSN :
- 18732976
- Volume :
- 207
- Database :
- OpenAIRE
- Journal :
- Bioresource technology
- Accession number :
- edsair.doi.dedup.....160c65fbc098ea51ce668fced640a598