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Isolation and Characterization of a Marine Microalga for Biofuel Production with Astaxanthin as a Co-Product
College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China
Tianjin Key Laboratory for Industrial Biological Systems and Bioprocess Engineering, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China
* Author to whom correspondence should be addressed.
Received: 6 February 2013; in revised form: 17 May 2013 / Accepted: 18 May 2013 / Published: 29 May 2013
Abstract: Microalgae have been considered as a promising biomass for biofuel production, but freshwater resource consumption during the scaled-up cultivation are still a challenge. Obtaining robust marine strains capable of producing triacylglycerols and high value-added metabolites are critical for overcoming the limitations of water resources and economical feasibility. In this study, a marine microalga with lipid and astaxanthin accumulation capability was isolated from Bohai Bay, China. The alga was named as Coelastrum sp. HA-1 based on its morphological and molecular identification. The major characteristics of HA-1 and the effects of nitrogen on its lipid and astaxanthin accumulations were investigated. Results indicated that the highest biomass, lipid and astaxanthin yields achieved were 50.9 g m−2 day−1, 18.0 g m−2 day−1 and 168.9 mg m−2 day−1, respectively, after cultivation for 24 days. The fatty acids of HA-1, identified in their majority as oleic acid (56.6%) and palmitic acid (25.9%), are desirable biofuel feedstocks. In addition, this alga can be harvested with simple sedimentation, achieving 98.2% removal efficiency after settling for 24 h. These results suggest that Coelastrum sp. HA-1 has several desirable key features that make it a potential candidate for biofuel production.
Keywords: astaxanthin; biofuel; Coelastrum sp. HA-1; marine microalgae; microalgae removal efficiency
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MDPI and ACS Style
Liu, Z.; Liu, C.; Hou, Y.; Chen, S.; Xiao, D.; Zhang, J.; Chen, F. Isolation and Characterization of a Marine Microalga for Biofuel Production with Astaxanthin as a Co-Product. Energies 2013, 6, 2759-2772.
Liu Z, Liu C, Hou Y, Chen S, Xiao D, Zhang J, Chen F. Isolation and Characterization of a Marine Microalga for Biofuel Production with Astaxanthin as a Co-Product. Energies. 2013; 6(6):2759-2772.
Liu, Zhiyong; Liu, Chenfeng; Hou, Yuyong; Chen, Shulin; Xiao, Dongguang; Zhang, Juankun; Chen, Fangjian. 2013. "Isolation and Characterization of a Marine Microalga for Biofuel Production with Astaxanthin as a Co-Product." Energies 6, no. 6: 2759-2772.