CO2 fixation by Chlorella sp. HA-1 and its utilization

Yanagi, Miyoko

doi:10.1016/0140-6701(96)89348-9

Cited by 11 publications

(16 citation statements)

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“…Em cultivo de Chlorella sp. HA-1 realizado com ar enriquecido com 10% de CO 2 o conteúdo lipídico alcançou 18,4% (YANAGI et al, 1995). As microalgas apresentaram menor conteúdo lipídico nos ensaios com 0,038% de CO 2 , com exceção da S. obliquus.…”

Section: Resultsunclassified

Perfil de ácidos graxos de microalgas cultivadas com dióxido de carbono

Morais

Costa

2008

Ciênc. agrotec.

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RESUMOAs microalgas são consideradas fontes potenciais de diversos compostos químicos. Os ácidos graxos obtidos da biomassa podem apresentar efeitos terapêuticos em humanos e podem ser usados para produção de biodiesel. Objetivou-se, neste trabalho verificar o conteúdo lipídico e o perfil dos ácidos graxos das microalgas Spirulina sp., Scenedesmus obliquus, Chlorella kessleri e Chlorella vulgaris cultivadas em diferentes concentrações de dióxido de carbono e bicarbonato de sódio. A microalga Chlorella kessleri cultivada com 12% de CO 2 apresentou a maior concentração de lipídios na biomassa seca (9,7% p/p). A máxima concentração de ácidos graxos insaturados foi 72,0% (p/p) para C. vulgaris cultivada com 12% de CO 2 . Para os ácidos graxos saturados o maior valor encontrado foi 81,6% (p/p), quando a microalga Spirulina sp. foi cultivada com 18% de CO 2 e 16,8 g.L -1 de bicarbonato de sódio. Termos para indexação:Ácidos graxos, Chlorella, lipídios, Scenedesmus, Spirulina. ABSTRACTMicroalgae have a great potential as a source of several chemical compounds. The fatty acids have shown therapeutic effects and used to produce biodiesel. The aim of this work was to verify the lipid contents and the fatty acids profile of the microalga Spirulina sp., Scenedesmus obliquus, Chlorella kessleri and Chlorella vulgaris cultived in different carbon dioxide and sodium bicarbonate concentrations. The microalgae Chlorella kessleri cultived with 12% CO 2 showed the highest lipid content in the dry biomass (9.7% p/p). The maximum unsaturated fatty acids concentration was 72.0% (p/p) to C. vulgaris in the culture with 12% CO 2 . The highest saturated fatty acids value was 81.6% (p/p) when microalga Spirulina sp. was cultived with 18% CO 2 and 16.8 g.L -1 sodium bicarbonate.

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Section: Resultsunclassified

Perfil de ácidos graxos de microalgas cultivadas com dióxido de carbono

Morais

Costa

2008

Ciênc. agrotec.

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“…It was found that 10-20% of protein can by replaced by SCP from Chlorella (Anupama 2000). Literature reports that the biomass of Chlorella contains 55-67% protein 18% lipids, 9-18 dietary fiber, ashes 11.3%, starch 0.7%, sugars 10.4%, salts 42 mg/100 g 1-4% chlorophylls, calorific value 5.38 kcal/g dry cells (Yanagi et al 1995). The artificial digestibility (with pepsin) was 85.9% and for this reason it is a valuable material to be used as fodder for livestock (Yanagi et al 1995;Hasegawa et al 2000).…”

Section: Introductionmentioning

confidence: 98%

Using biosorption to enrich the biomass of Chlorella vulgaris with microelements to be used as mineral feed supplement

Chojnacka

2007

World J Microbiol Biotechnol

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The paper discusses biosorption of Cr(III), Cu(II), Mn(II), Zn(II) and Co(II) to the biomass of Chlorella vulgaris, to produce a biologically bound, concentrated form of microelements. The kinetics of biosorption was described with a pseudo-second order equation and equilibrium with the Langmuir isotherm. The mechanism of biosorption was identified as cationexchange with alkaline metals. Cation-exchange capacity was evaluated as 4.07 meq g -1 . The effect of operation conditions, pH and temperature, on biosorption performance was investigated and the best operation conditions for biosorption were selected (pH 5, temperature 25°C). The maximum sorption capacity of microelements was determined in single-metal system at pH 5 and 25°C: Zn(II) 3.30 meq g -1 , Cu(II) 1.77 meq g -1 , Co(II) 1.75 meq g -1 , Cr(III) 1.74 meq g -1 , Mn(II) 0.764 meq g -1 . Biosorption experiments were also carried out in multi-metal system. The biomass of C. vulgaris enriched with microelements via the process of biosorption in both single-and multi-metal system was discussed in terms of preparation of feed supplement for laying hens and piglets. The experiments showed that 1 kg of conventional feed for laying hens can be supplemented with 0.20 g of the biomass enriched with microelements and for piglets with 0.15 g of the preparation.

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“…that was cultivated without difficulty while subjected to flue gas containing 14.1% CO 2 , 1.3% O 2 , 185 ppm SO x , and 125 ppm NO x . Other strains of microalgae have shown similar tolerances to carbon dioxide and NO x , but less tolerance to the sulfur oxides Yanagi et al, 1995).…”

Section: Effects Of Flue Gas On Microalgaementioning

confidence: 99%

“…Products derived from microalgae include extraction products such as fatty acids, glycerol, protein, pigments, and sugars; bioconversion products such as alcohols, organic acids, and methane; and catalytic conversion products such as paraffins, olefins, and aromatics (Chelf et al, 1993;Michiki, 1995). Other products might include colorants, perfumes, vitamins, hydrogen production, and fodder for livestock (Michiki, 1995;Yanagi et al, 1995;Miura et al, 1995). In one experiment, algae added to a wood pulp, along with a polyacrylamide, improved density of the paper by filling void spaces (Hon-Nami et al, 1997).…”

Section: Beneficial Uses Of Harvested Algaementioning

confidence: 99%