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首页> 外文期刊>Bioprocess and Biosystems Engineering >Using fluorochemical as oxygen carrier to enhance the growth of marine microalga Nannochloropsis oculata
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Using fluorochemical as oxygen carrier to enhance the growth of marine microalga Nannochloropsis oculata

机译：用氟化物作为氧气载体促进海洋微藻Nannochloropsis oculata的生长

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The commercial value of marine Nannochloropsis oculata has been recognized due to its high content of eicosapentaenoic acid (>50 % w/w). To make it as a profitable bioresource, one of the most desirable goals is to develop a quality-controlled, cost-effective, and large-scale photobioreactor for N. oculata growth. Generally, closed culture system can offer many advantages over open system such as small space requirement, controllable process and low risk of contamination. However, oxygen accumulation is often a detrimental factor for enclosed microalgal culture that has seriously hampered the development of microalga-related industries. In this study, we proposed to use fluorochemical as oxygen carrier to overcome the challenge where four liquid fluorochemicals namely perfluorooctyl bromide, perfluorodecalin, methoxynonafluorobutane, and ethoxyno-nafluorobutane were investigated separately. Our results showed that the microalgal proliferation with different fluorinated liquids was similar and comparable to the culture without a fluorochemical. When cultured in the photobioreactor with 60 % oxygen atmosphere, the N. oculata can grow up in all the fluorochemical photobioreactors, but completely inhibited in the chamber without a fluorochemical. Moreover, the perfluorooctyl bromide system exhibited the most robust efficacy of oxygen removal in the culture media (perfluorooctyl bromide > perfluorodecalin > methoxynonafluorobutane > ethoxynonafluorobutane), and yielded a >3-fold increase of biomass production after 5 days. In summary, the developed fluorochemical photobioreactors offer a feasible means for N. oculata growth in closed and large-scale setting without effect of oxygen inhibition.
机译：由于其二十碳五烯酸的含量高（> 50％w / w），因此已认识到海洋Nannochloropsis oculata的商业价值。为了使其成为一种有利可图的生物资源，最可取的目标之一是开发一种质量可控，具有成本效益的大规模光生物反应器，以用于猪眼线虫的生长。通常，与开放系统相比，封闭培养系统可提供许多优势，例如空间需求小，过程可控以及污染风险低。但是，氧气积累通常是封闭微藻培养的有害因素，严重阻碍了微藻相关产业的发展。在这项研究中，我们建议使用氟化物作为氧载体来克服挑战，分别研究四种液体氟化物，即全氟辛基溴化物，全氟十氢化萘，甲氧基九氟丁烷和乙氧基壬基氟丁烷。我们的结果表明，使用不同氟化液的微藻增殖与不使用氟化物的培养物相似且相当。当在含60％氧气的光生物反应器中培养时，眼球菌可在所有含氟光生物反应器中长大，但在没有含氟化学物质的室内完全被抑制。此外，全氟辛基溴化物体系在培养基中表现出最强的除氧功效（全氟辛基溴化物>全氟十氢化萘>甲氧基九氟丁烷>乙氧基九氟丁烷），并在5天后生物量产生增加了3倍以上。总而言之，开发的含氟光生物反应器为封闭和大规模设置中的眼球猪笼草生长提供了一种可行的方法，而没有氧气抑制作用。

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