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Title

Growth and lipid accumulation in response to different cultivation temperatures in Nannochloropsis oculata for biodiesel production

مجله مدیریت ومهندسی بهداشت محیط، دوره: 3، شماره: 1
Year: 1394
COI: JR_EHEM-3-1_005
Language: EnglishView: 446
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Authors

Mohammad Malakootian - Professor, Environmental Health Engineering Research Center and Department of Environmental Health, Kerman University of Medical Sciences, Kerman, Iran
Behnam Hatami - MSc, Department of Environmental Health, Kerman University of Medical Sciences, Kerman, Iran
Shidwash Dowlatshahi - Instructure, Environmental Health Engineering Research Center, Department of Environmental Health, Kerman University of Medical Sciences, Kerman, Iran
Ahmad Rajabizadeh - Instructure, Environmental Health Engineering Research Center, Department of Environmental Health, Kerman University of Medical Sciences, Kerman, Iran

Abstract:

Background: Microalgal lipid is a promising feedstock for biodiesel production. The aim of the present study was to investigate the effects of cultivation temperature on the growth and lipid accumulation properties of Nannochloropsis oculata microalgae.Methods: Nannochloropsis oculatacan grow in a wide range of temperatures (5 ~ 35°C). Late in the stationary growth phase of microalgae, biomass production and lipid accumulation were measured. The methanol-chloroform extraction method was used to extract total lipids from dried cells. The direct esterification method was used to measure fatty acids. Constituents were identified by gas chromatography.Results: The results show that the maximum specific growth rate at 20°C was 0.1569 day-1, and the maximum biomass production of microalgae at 25°C was 2.2667 g/L. The highest percentage of biomass conversion into lipid (35.71%) occurred at 30°C. Maximum lipid productivity was seen at temperatures of 15°C, 20°C, and 25°C, but the analysis of fatty acids in the three temperatures shownare maximum accumulations of triglycerides in the microalgae cells at 20°C and 25°C.Conclusion: In the cultivation of Nannochloropsis oculata, the optimal temperature range for maximum efficiency in biodiesel production from lipids is 20°C to 25°C.

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Malakootian, Mohammad and Hatami, Behnam and Dowlatshahi, Shidwash and Rajabizadeh, Ahmad,1394,Growth and lipid accumulation in response to different cultivation temperatures in Nannochloropsis oculata for biodiesel production,https://civilica.com/doc/488027

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Type of center: علوم پزشکی
Paper count: 2,100
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