Feasibility of CO2 mitigation and carbohydrate production by microalga Scenedesmus obliquus CNW-N used for bioethanol fermentation under outdoor conditions: Effects of seasonal changes

Shih Hsin Ho, Yi Di Chen, Ching Yu Chang, Yen Ying Lai, Chun Yen Chen, Akihiko Kondo, Nan Qi Ren, Jo Shu Chang

研究成果: Article同行評審

46 引文 斯高帕斯(Scopus)

摘要

Background: Although outdoor cultivation systems have been widely used for mass production of microalgae at a relatively low cost, there are still limited efforts on outdoor cultivation of carbohydrate-rich microalgae that were further used as feedstock for fermentative bioethanol production. In particular, the effects of seasonal changes on cell growth, CO2 fixation, and carbohydrate production of the microalgae have not been well investigated. Results: This work demonstrates the feasibility of using outdoor tubular photobioreactors (PBR) for whole-year-round cultivation of a carbohydrate-rich microalga Scenedesmus obliquus CNW-N in southern Taiwan. Time-course profile of the carbohydrate content under nitrogen-deficient conditions was monitored to assess the seasonal changes. The optimal CO2 fixation rate and carbohydrate productivity were 430.2 mg L-1 d-1and 111.8 mg L-1d-1, respectively, which were obtained during the summer time. Under nitrogen starvation, the microalgal biomass can accumulate nearly 45-50% of carbohydrates, mainly composed of glucose that accounted for 70-80% of the total carbohydrates in the microalgal cells. This glucose-rich microalgal biomass is apparently a very suitable carbon source for bioethanol fermentation. Conclusion: This work shows the feasibility of combining CO2 fixation and bioethanol production using microalgae grown in outdoor photobioreactors as feedstock. The understanding of the seasonal changes in the carbohydrate productivity makes this approach more practically viable. The novel strategy proposed in this study could be a promising alternative to the existing technology dealing with CO2 mitigation and biofuels production.

原文English
文章編號27
期刊Biotechnology for Biofuels
10
發行號1
DOIs
出版狀態Published - 2017 1月 31

All Science Journal Classification (ASJC) codes

  • 生物技術
  • 應用微生物與生物技術
  • 可再生能源、永續發展與環境
  • 能源(全部)
  • 管理、監督、政策法律

指紋

深入研究「Feasibility of CO2 mitigation and carbohydrate production by microalga Scenedesmus obliquus CNW-N used for bioethanol fermentation under outdoor conditions: Effects of seasonal changes」主題。共同形成了獨特的指紋。

引用此