Cyanobacterial extract as a source of nutrients for mixotrophic growth of Chlorella vulgaris and Nannochloropsis oculata

2019 ◽  
Vol 39 ◽  
pp. 101480
Author(s):  
Samira Rezasoltani ◽  
Farzaneh Vahabzadeh ◽  
Zeinab Shariatmadari ◽  
Faezeh Ghanati
2017 ◽  
Vol 26 ◽  
pp. 153-160 ◽  
Author(s):  
Sandra Milena Rincon ◽  
Hernan Mauricio Romero ◽  
Wrya Moh Aframehr ◽  
Haluk Beyenal

2018 ◽  
Vol 154 ◽  
pp. 01009
Author(s):  
Dianursanti ◽  
Zenitha Lintang Agustin ◽  
Dwini Normayulisa Putri

Chlorella vulgaris and Nannochloropsis oculata are a highly potential microalgae to be used in pilot-scale of biodiesel synthesis. The essential content from these microalgae is the fatty acid of lipid which is the main target for the feed and biodiesel industries. One of the key factor in improving lipid microalgae are the arrangemment of nutrients in the growth medium. Research on the regulation of nutrients using bicarbonate (HCO3-) as an additional inorganic carbon source has been done by many studies, but the yield of lipids obtained has not been much. The aim of the study was to improve the lipid yield of Chlorella vulgaris and Nannochloropsis oculata. Variation of [HCO3-] which added to Walne medium were 25 ppm and 75 ppm, while the Walne medium without the addition of bicarbonate acts as control. The results showed that [HCO3-] 75 ppm could increase Chlorella vulgaris biomass by 0.9162 g/l with 17.0% wt, while Nannochloropsis oculata produced the greatest lipid content in [HCO3-] 25 ppm of 20.3% wt and the largest biomass on [HCO3-] 75 ppm of 1.7233 g/l.


2009 ◽  
Vol 39 (6) ◽  
pp. 1760-1767 ◽  
Author(s):  
Silvana Ohse ◽  
Roberto Bianchini Derner ◽  
Renata Ávila Ozório ◽  
Maurício Villela Da Costa Braga ◽  
Paulo Cunha ◽  
...  

O aumento da emissão de CO2 e de outros gases efeito estufa tem gerado debates em nível mundial sobre alterações climáticas e estimulado o desenvolvimento de estratégias mitigadoras. Trabalhos nessa área incluem sequestro de CO2 por meio da produção de microalgas aquáticas. Por essa razão, desenvolveu-se um estudo visando determinar os teores de carbono, hidrogênio, nitrogênio e proteína e a produção de biomassa seca de nove espécies de microalgas marinhas (Nannochloropsis oculata, Thalassiosira pseudonana, Phaeodactylum tricornutum, Isochrysis galbana, Tetraselmis suecica, Tetraselmis chuii Chaetoceros muelleri, Thalassiosira fluviatilis e Isochrysis sp.) e uma de água doce (Chlorella vulgaris), em cultivo autotrófico estacionário com objetivo de identificar as mais produtivas e com maior capacidade de fixação de carbono. O experimento foi desenvolvido em sala de cultivo, na Universidade Federal de Santa Catarina, com iluminação contínua e radiação em torno de 150µmol m-2 s-1, temperatura de 25±2°C, suplementação de ar constante, sendo utilizados erlenmeyers com 800mL de meio de cultura. O delineamento experimental foi de blocos casualizados no tempo com três repetições. As espécies C. vulgaris e T. suecica são menos produtivas. Quando se visa à suplementação alimentar, as espécies C. vulgaris e T. Chuii são consideradas interessantes, uma vez que apresentam altos teores de C, N, H e proteína. As espécies N. Oculata, T. pseudonana e C. vulgaris apresentam altos teores de C, demonstrando alta capacidade de fixação de carbono.


2016 ◽  
Vol 144 ◽  
pp. 132-138 ◽  
Author(s):  
M.P. Caporgno ◽  
M. Olkiewicz ◽  
A. Fortuny ◽  
F. Stüber ◽  
A. Fabregat ◽  
...  

2014 ◽  
Vol 14 (2) ◽  
pp. 43-48
Author(s):  
U Rai ◽  
G Deshar ◽  
B Rai ◽  
K Bhattarai ◽  
RP Dhakal ◽  
...  

Chlorella vulgaris Beyerinck (Beijerinck) is one of the fast growing planktonic microalgae predominantly found in lentic habitats. It was isolated from water samples using BG 11 medium and identified and screened for mixotrophic growth using glucose as carbon source in the medium. The growth of this algae was also studied for autotrophic and mixotrophic regimen. It showed higher growth in a medium of pH 7 containing glucose rather than in autotrophic condition. Similarly, its growth was also studied in media containing different nitrogen sources in which NaNO3 gave the best result. A pilot scale culture of C. vulgaris was performed in 5 l fermenter illuminated with fluorescent tube of 36 W maintaining 16:8 hrs of light and dark period with pH 7, temperature at 25°C, stirrer rate at 75 rpm, air flow rate at 30 L/hr. The specific growth rate was found to be 6.879 cells/ ml/ day whereas doubling time was found to be 2 hrs and 9 mins. The cells were harvested by sedimentation and centrifugation followed by drying at 50°- 80°C. The dried biomass was treated with dichloromethane: methanol (2:1) v/v solution in Soxhlet extractor for 3 DOI: http://dx.doi.org/10.3126/njst.v14i2.10414   Nepal Journal of Science and Technology Vol. 14, No. 2 (2013) 43-48


2014 ◽  
Vol 152 ◽  
pp. 471-476 ◽  
Author(s):  
Yan Ji ◽  
Wenrong Hu ◽  
Xiuqing Li ◽  
Guixia Ma ◽  
Mingming Song ◽  
...  

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