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题名: Recycling Nannochloropsis oceanica culture media and growth inhibitors characterization
作者: Zhang, Xuezhi1, 2; Lu, Zhiying1, 2; Wang, Yifei3; Wensel, Pierre3; Sommerfeld, Milton3; Hu, Qiang1, 2
关键词: Media recycling ; Growth inhibition ; Nannochloropsis ; Inhibitor ; Characterization
刊名: ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
发表日期: 2016-12-01
DOI: 10.1016/j.algal.2016.09.001
卷: 20, 页:282-290
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
类目[WOS]: Biotechnology & Applied Microbiology
研究领域[WOS]: Biotechnology & Applied Microbiology
英文摘要: The sequential recycling of culture medium that had different initial nitrogen concentrations and was treated with an ultrafiltration membrane was investigated to determine the effects of recycled media on the growth of Nannochloropsis oceanica. Algae growth and lipid accumulation were inhibited by the recycled media. The final average ash-free dry weight (AFDW) values of N. oceanica after 12 days of cultivation in the recycled media at initial nitrogen concentrations of 64 and 32 mg L-1 were 2.3 and 1.6 g L-1, respectively, and these values were 14.8% and 23.8% lower than those of the AFDW of N. oceanica cultured in fresh media (2.7 and 2.1 g L-1, respectively). The total lipid contents of the algae cultured in the recycled media for 12 days (37.2 +/- 2.9% and 39.7 +/- 4.3%, at initial nitrogen concentrations of 64 and 32 mg L-1, respectively) were lower than those of the algae cultivated in the fresh media (43.7 +/- 3.3% and 47.2 +/- 1.2%, respectively). A greater number of cell aggregates were observed in the recycled media culture at low initial nitrogen concentrations than in the fresh media. The removal of potential growth inhibitors in the recycled media by activated carbon resulted in a moderate increase in the AFDW and total lipid content. The recycled media were characterized using Fluorescence Excitation-Emission Matrix (FEEM), Fourier Transform Infrared (FTIR) and size-exclusion HPLC analyses, and the results indicated that polysaccharides humic acid-like and fulvic acid-like substances occurred in the recycled media and likely caused the growth inhibition. Further studies are necessary to confirm the inhibitory effects of these components, explore the mechanisms of inhibition, and identify more efficient methods of removing growth inhibitors from recycled culture media. (C) 2016 Elsevier B.V. All rights reserved.
关键词[WOS]: EXTRACELLULAR POLYMERIC SUBSTANCES ; HUMIC SUBSTANCES ; TRACE-METALS ; BIODIESEL PRODUCTION ; VIBRATIONAL-SPECTRA ; CHLORELLA-VULGARIS ; WASTE-WATER ; ACID ; MICROALGAE ; ALGAE
语种: 英语
项目资助者: State Development & Investment Corporation in China ; 100 Talents Program of Chinese Academy of Sciences
WOS记录号: WOS:000390560000033
ISSN号: 2211-9264
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/28769
Appears in Collections:藻类生物技术和生物能源研发中心_期刊论文

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作者单位: 1.Chinese Acad Sci, Ctr Microalgal Biotechnol & Biofuels, Inst Hydrobiol, Wuhan, Peoples R China
2.Chinese Acad Sci, Inst Hydrobiol, Key Lab Algal Biol, Wuhan, Peoples R China
3.Arizona State Univ, Arizona Ctr Algae Technol & Innovat, Polytech Campus, Mesa, AZ 85212 USA
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