CO2 fixation and oil production using micro-algae

Kishimoto, Michimasa; Okakura, Toru; Nagashima, Hideyuki; Minowa, Tomoaki; Yokoyama, Shoko; Yamaberi, Keiko

doi:10.1016/0922-338x(94)90052-3

Cited by 90 publications

(20 citation statements)

References 10 publications

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“…In addition Spirulina is considered one of the most concentrated natural sources for nutrition to both terrestrial and aquatic animals. Therefore, Spirulina could be an excellent source of useful nutrients (Glombitza and Koh, 1989) as well as a good energy source that can be used as crucial component for animal feeding (Kishimoto et al, 1994;Kim et al, 2013). FAO fisheries statistics showed a clear increase in production of Spirulina species over the recent years.…”

Section: Introductionmentioning

confidence: 99%

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El‐Sheekh¹,

El-Shourbagy²,

Shalaby³

et al. 2014

Turk. J. Fish. Aquat. Sci.

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The present study was designed to evaluate the use of Spirulina, Arthrospir platensis as a protein source for hybrid red tilapia fries (Oreochromis niloticus x Oreochromis mossambicus) with average weights of 206±11 mg. Spirulina was incorporated into diets at 0, 50, 75, and 100% of the fishmeal-based diet. The test diets were fed to the fish at 12% body weight three times a day for consecutive 65 days at 24±2°C. The final weight gain, specific growth rate, feed conversion ratio (FCR) and survival rate of fish were evaluated. The present study suggests that up to 75% of Spirulina can be substituted for fishmeal in a fishmeal-based diet for hybrid red tilapia with increased feed conversion ratio and protein productive value in carcass proximate composition. Also higher immunity can be observed than other treatments, where white blood cells were 4.08 x10 3 mm. In conclusion, the results of this study indicate the possibility of using Arthrospira platensis as commercial nutrient source for large scale culture of fish in general and tilapia in particular.

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Section: Introductionmentioning

confidence: 99%

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El‐Sheekh¹,

El-Shourbagy²,

Shalaby³

et al. 2014

Turk. J. Fish. Aquat. Sci.

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“…Microalgae require CO 2 as the one of the main utilizable element for aggrandizing its growth [39]. Microalgae have the capability to take CO 2 from many sources such as industries with simultaneously abating its wicked effects [40].…”

Section: Lipid-rich Algal Biomass Production Harvesting and Dryingmentioning

confidence: 99%

Microalgae: An emerging source of energy based bio-products and a solution for environmental issues

Katiyar

Gurjar

Biswas

et al. 2017

Renewable and Sustainable Energy Reviews

128

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“…The other is the conversion of algal biomass into liquid fuel oil by thermochemical liquefaction reactions at a high temperature and pressure (1). The latter process is expected to stimulate CO 2 circulation on earth, and is considered to be a simpler and more appropriate process for worldwide implementation than the former.…”

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confidence: 99%

Effect of salt concentration on intracellular accumulation of lipids and triacylglyceride in marine microalgae Dunaliella cells

Takagi

Karseno

Yoshida

2006

Journal of Bioscience and Bioengineering

559

254

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Running title: SALT STRESS FOR ACCUMULATION OF LIPIDSIn order to get the high liquefaction yield from marine algae cell mass to fuel oil, the effect of salt stress on the accumulation of lipids and triacylglyceride in Dunaliella cells was investigated. Although initial NaCl concentration higher than 1.5 M markedly inhibited cell growth, increase of initial NaCl concentration from 0.5 (equal to sea water) to 1.0 M resulted in a higher intracellular lipid content (67%) in comparison with 60% for the salt concentration of 0.5 M. Addition of 0.5 or 1.0 M NaCl at mid-log phase or the end of log phase during cultivation with initial NaCl concentration of 1.0 M further increased the lipid content (70%). Since atmospheric CO 2 accumulation has a serious effect on the global environment, the control of total CO 2 emission into the atmosphere is considered to be an important issue related to the biosphere. Marine microalgae are expected to play an important role in resolving this problem because they have a high capability for photosynthesis and grow well in the sea which solubilizes a high amount of CO 2 and which accounts for 70% of the surface area of the earth. There are two major approaches to large-scale CO 2 fixation by marine microalgae.One is the production of non-carbon energy sources such as hydrogen gas from the algal biomass. The other is the conversion of algal biomass into liquid fuel oil by thermochemical liquefaction reactions at a high temperature and pressure (1). The latter process is expected to stimulate CO 2 circulation on earth, and is considered to be a simpler and more appropriate process for worldwide implementation than the former.One of the most important criteria in assessing the performance of thermochemical liquefaction is the oil yield from the organic materials in the algal biomass. A report on liquefaction using various model substrates revealed that a high liquefaction yield was obtained from cell components containing hydrophobic compounds such as lipids, fatty acids and fatty acid esters (2). Among marine microalgae species, cells of the genus Nannochloris are known to contain a large amount of intracellular lipids (3, 4). It was reported that the intracellular triacylglyceride content increased after nitrate depletion during a cultivation of Nannochloris sp. UTEX LB1999 cells 2 3 in modified NORO medium containing 9.9 mM KNO 3 even though the intracellular lipid content did not increase and the oil yield following liquefaction of the cells increased in proportion to the intracellular triacylglyceride content (5). When 0.9 mM nitrate was intermittently fed 10 times during the log phase in addition to initial nitrate feed (0.9 mM), the concentration of Nannochloris sp. UTEX LB1999 reached almost the same (2.16 g/l) and the contents of intracellular lipids and the percentage of triacylglycerides in the lipids were respectively increased from 31.0% to 50.9% and 26.0% to 47.6%, compared with those of cells cultured in a modified NORO medium containing 9.9 mM KNO 3 without additional nitra...

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CO2 fixation and oil production using micro-algae

Cited by 90 publications

References 10 publications

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Microalgae: An emerging source of energy based bio-products and a solution for environmental issues

Effect of salt concentration on intracellular accumulation of lipids and triacylglyceride in marine microalgae Dunaliella cells

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