Selection of microalgae for high CO₂ fixation efficiency and lipid accumulation from ten Chlorella strains using municipal wastewater

详细信息    查看全文

• 作者：Xia Hu ^{huxia.86@163.com" class="auth_mail" title="E-mail the corresponding author} ; Jiti Zhou ; ^{jitizhou502@163.com" class="auth_mail" title="E-mail the corresponding author} ; Guangfei Liu ; Bing Gui
• 关键词：Chlorella strains ; CO2 fixation ; Lipid accumulation ; Municipal wastewater influent
• 刊名：Journal of Environmental Sciences
• 出版年：2016
• 出版时间：August 2016
• 年：2016
• 卷：46
• 期：Complete
• 页码：83-91
• 全文大小：1391 K

文摘

As significant differences in cellular physiology, metabolic potential and genetics occur among strains with morphological similarity, the screening of appropriate microalgae species for effective CO₂ fixation and biodiesel production is extremely critical. In this study, ten strains of Chlorella were cultivated in municipal wastewater influent (MWI) and their tolerance for MWI, CO₂ fixation efficiency and lipid productivity were assessed. The results showed that the biomass concentrations of four strains (Chlorella vulgaris, Chlorella 64.01, Chlorella regularis var. minima and Chlorella sp.) were significantly higher than other strains. When the cultivation systems were aerated with 10% CO₂, Chlorella sp. showed the highest CO₂ fixation efficiency (35.51%), while the highest lipid accumulation (58.48%) was observed with C. vulgaris. Scanning electron microscopy images revealed that the cells of both Chlorella sp. and C. vulgaris kept their normal morphologies after 15 day batch culture. These findings indicated that Chlorella sp. and C. vulgaris have fairly good tolerance for MWI, and moreover, Chlorella sp. was appropriate for CO₂ fixation while C. vulgaris represented the highest potential for producing biodiesel.