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Electronic Journal of Biotechnology
Universidad Católica de Valparaíso
ISSN: 0717-3458
Vol. 18, No. 1, 2015, pp. 46-50
Bioline Code: ej15009
Full paper language: English
Document type: Research Article
Document available free of charge

Electronic Journal of Biotechnology, Vol. 18, No. 1, 2015, pp. 46-50

 en Cultivation of Scenedesmus dimorphus for C/N/P removal and lipid production
Xu, Xinmiao; Shen, Ying & Chen, Jiacheng

Abstract

Background: CO2 emission,water pollution and petroleumshortage are the issues comingwith the development of industry. A cost effective system was constructed to fix the CO2 in flue gas (15% CO2), remove nitrogen and phosphorus from manure wastewater and produce biofuels at the same time. The significant cultivation conditions were selected by Plackett–Burman design, and then optimized with central composite design.
Results: Optimum culture condition was predicted at light intensity of 238 μmol·m-2·s-1, TN of 152 mg·L-1, inoculum density of 0.3 g·L-1, under which the measured CO2 fixation rate, total nitrogen and phosphorus removing rate, and lipid content were 638.13 mg·L-1·d-1, 88.16%, 73.98% and 11.9%, respectively. The lipid content was then enhanced to 24.2% by a nitrogen starvation strategy.
Conclusion: A cultivation strategy was suggested to achieve effective C/N/P removal from flue gas and manure wastewater, and meanwhile obtained high lipid content from microalgal biomass.

Keywords
CO2 fixation rate; Flue gas; Lipid content; Scenedesmus dimorphus; Wastewater

 
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