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2025年4月5日 星期六
  2016, Vol. 24 Issue (3): 461-468    
  研究资源与技术改进 本期目录 | 过刊浏览 | 高级检索 |
平板式光生物反应器中螺旋藻高密度培养的工艺优化
石峰1,刘冉1,纪瑞杰2,玛黑扎·吾恩尔别克1,何梅琳1,王长海1,郑青松1
1. 南京农业大学资源与环境科学学院
2. 南京农业大学 资源与环境科学学院/江苏省海洋生物学重点实验室
Process Optimization of High-density Cultivating Spirulina platensis in a Flat Photobioreactor
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摘要 螺旋藻作为保健食品或食品添加剂被广泛的人工培养并被制成片状和粉状广泛应用。生物反应器是一个进行涉及到生物或生物活性物质生产的容器。用光生物反应器高密度培养微藻也成为国内外研发的热点。中国养殖的螺旋藻主要为钝顶螺旋藻(Spirulina platensis)。本研究中,以钝顶螺旋藻为试材,用三角瓶和平板式光生物反应器培养,并设计不同的培养条件(添加不同浓度的葡萄糖和抗氧化剂, 设置不同通气模式和光照条件),探讨其培养工艺参数的优化。结果显示,在三角瓶中,分别适当添加葡萄糖、Na2S2O3和Na2SO3,均可显著提高钝顶螺旋藻的生物量,其最适浓度分别为3、3和2 g/L;光反应器培养下,随着通气处理强度的上升,藻生物量显著增加;而逐步增大通气强度的处理下,藻生物量促进效果则更为明显;单面光源(4 500 lx)培养下的藻生物量要显著高于双面光源(9 000 lx)培养的,但是先单面光源培养,在微藻进入对数期生长时,转变为双面光源培养,其培养产量更高。进一步研究表明,与Na2S2O3相比,Na2SO3与葡萄糖组合效果更好,进一步对各条件优化显示,在葡萄糖浓度4 g/L和Na2SO3浓度3 g/L时,藻生物量达到最大值。上述研究表明,添加葡萄糖、Na2SO3、逐步增加通气强度的模式、先单面光源后双面光源培养的光照模式可明显促进钝顶螺旋藻的产量,综合优化的培养条件下,该藻体的平均生长速率和生物量可高达0.85 gDW/(L·d)和10.02 gDW/L。本生物反应器还具有动力消耗小、占地面积小、造价相对便宜、清洗方便、结构简单和容易在室内扩大规模培养等优点。本研究为扩大螺旋藻的培养规模提供了理论依据和技术方法。
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石峰
刘冉
纪瑞杰
玛黑扎·吾恩尔别克
何梅琳
王长海
郑青松
关键词 钝顶螺旋藻平板式光生物反应器葡萄糖抗氧化剂通气量光照度高密度培养    
Abstract:Spirulina is cultivated worldwide, used as a dietary supplement as well as a whole food, and is also available in tablet, flake and powder form. It is significant to improve the production capacity of Spirulina by optimization of production process. A biological reactor has a tank with an interior for growing the biological mass, and application of photobioreactor on high density culture of microalgae has become a hot spot in the domestic and foreign studies. The main economic spirulina is Spirulina platensis and S. maxima, however, S. platensis is the main Spirulina cultured in China. In this study, S. platensis was cultured by triangular flask and flat plate photobioreactor, and different culture conditions (concentration of glucose and antioxidants, and modes of ventilation and illumination) were designed to study the optimization of manufacture process. Results showed that adding glucose, Na2S2O3 and Na2SO3 to triangular flasks separately could significantly improve the algae biomass, and its optimal concentration was 3, 3 and 2 g/L, respectively. Under algae culture in flat plate photobioreactor, the biomass of algae was increased significantly with the increase of aeration intensity from 100 to 800 L/h, however, algae biomass improvement was more obvious under the treatment of gradually increasing aeration intensity from 100 L/h to 800 L/h. Algae biomass cultured by single-side light (4 500 lx) was obviously more than that cultured by double-side light (9 000 lx), and significantly less than that cultured by first single-side light and then double-side light at algae entering into logarithmic phase. The combination effect of Na2SO3 and glucose on algae biomass was better than that of Na2S2O3 and glucose. Further optimization of the above-mentioned conditions suggested that the algae biomass achieved the peak values under 4 g/L glucose and 3 g/L Na2SO3. Generally, adding glucose, Na2SO3, gradually increasing aeration intensity and illumination mode of the double side light source after the first one side light source increased algae production of S. platensis significantly. Under the condition of comprehensive optimization, the algae average growth rate and biomass production could be as high as 0.85 gDW/(L·d) and 10.02 gDW/L, respectively. Moreover, this photobioreactor had several advantages. That is small power consumption, small occupation area, relatively cheap cost, easy cleaning, simple structure, easy scale cultivation in room, etc. This culture technology can provide the theory basis and the technical method for scale cultivation of Spirulina.
Key wordsSpirulina platensis,    Flat photobioreactor    Glucose    Antioxidant    Ventilatory capacity    Illumination    High-density cultivation
收稿日期: 2015-08-18      出版日期: 2016-02-05
ZTFLH:  Q949.99  
基金资助:国家高技术研究发展计划
通讯作者: 郑青松     E-mail: qszheng@njau.edu.cn
引用本文:   
石峰 刘冉 纪瑞杰 玛黑扎·吾恩尔别克 何梅琳 王长海 郑青松. 平板式光生物反应器中螺旋藻高密度培养的工艺优化[J]. , 2016, 24(3): 461-468.
链接本文:  
http://journal05.magtech.org.cn/Jwk_ny/CN/     或     http://journal05.magtech.org.cn/Jwk_ny/CN/Y2016/V24/I3/461
 
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