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水资源危机和对环境污染的担忧推动了传统废水处理工艺的升级。微藻可大量积累油脂等高附加值次级代谢产物,而微藻在废水中培养,可同时满足获取微藻生物质和废水处理的需求。综述了微藻培养与废水处理相结合的特点,阐述了微藻废水处理工艺,包括光生物反应器、生物膜-光生物反应器、微藻-细菌共培养、微藻型微生物燃料电池以及耦合植物生长调节剂,对提高废水中微藻生物活性、产油能力和废水处理效率的作用。鉴于废水组成的复杂性和微藻的适应性,还需创新废水微藻培养工艺与技术以实现更高的废水生物修复效率和微藻高附加值产物产率。 相似文献
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为降低钝顶螺旋藻培养和采收成本,利用膜光生物反应器(MPBR)进行钝顶螺旋藻培养和预采收的条件研究实验。实验结果表明:当生物量达到1.8 g/L时可进行微藻采收;初始藻液质量浓度为1.828 g/L时,MPBR中最大体积浓缩系数为2,最佳稀释率为0.08 d-1,藻产品质量浓度可达3.319 g/L;获得1 g微藻生物量,MPBR中可节约水、氮、磷的量分别为0.301 L、0.248 g、0.053 g。与传统光生物反应器(PBR)相比,MPBR能够降低微藻培养和采收的成本。 相似文献
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搭建了一个6 L容积曝气型垂直柱光生物反应器,在6—8月期间置于室外屋顶运行,旨在考察夏季室外培养微藻Chlorella sorokiniana的可行性。室外培养时,若p H超过8.5,微藻会出现明显絮凝沉淀现象。太阳光入射到反应器的高达(1 700±137)μmol/(m2·s)的光照强度带来的光抑制作用及随之引起的超过48℃的高温,对微藻细胞的损伤造成了室外培养的抑制现象。当培养液温度超过40℃时,Chlorella sorokiniana几乎不能生长。在反应器周围放置金属镀层反射隔热膜反射板,可以减少(42.21±4.7)%的光照强度,使培养液温度下降2~4℃,但晴天时光照强度仍然可达900μmol/(m2·s)以上,光抑制作用不能很好被解除。为实现微藻在室外反应器中可持续地快速增长,仍需进一步采取措施减弱光照强度。 相似文献
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在光生物反应器培养螺旋藻中pH值的调控作用分析 总被引:1,自引:0,他引:1
在光辐射板式光生物反应器中 ,为实现螺旋藻单藻种群优势生长 ,分析研究了螺旋藻在光生物反应器培养过程中 ,pH值的调控作用。研究结果表明 ,溶液的 pH值不仅显著影响培养基中无机碳源营养基质的离解程度 ,螺旋藻的光合放氧特性 ,而且是控制螺旋藻优势单种培养的必要条件和关键因素 ,当溶液的 pH值控制在 9 0~ 9 5时 ,即使螺旋藻处于低温或营养限制性生长时 ,仍能实现优势单藻种生长 相似文献
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该试验在光合自养和混合营养两种条件下,分别采用250 mL摇瓶、5.0 L全自动发酵罐和10.0 L自制光生物反应器培养螺旋藻,以藻体生物量为试验指标,比较细胞在3种装置中的生长情况。结果可知,10.0 L光生物反应器培养效果最好,在光合自养条件下藻体生物量最大为1.277 g/L,比摇瓶和全自动发酵罐培养时分别提高78.6%和61.8%,混合营养条件下最大值为1.715 g/L,比其他两种装置分别提高了6.3%和6.1%。表明自制的光生物反应器能很好地满足螺旋藻细胞生长,且结构简单,操作简便。 相似文献
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高效培养螺旋藻封闭式光生物反应器系统的结构单元分析 总被引:4,自引:0,他引:4
本文根据螺旋藻工业生产特点和现状及国内外研究动态分析表明,螺旋藻等藻类生物高新技术的产业发展潜力,在很大程度上主要取决于封密式光生物反应器技术的发展。目前,封密式新型光生物反应器的研制已成为螺旋藻大规模培养及基因工程藻类生物工程技术的主要发展趋势及国外研究热点,而在我国,此项研究则刚刚起步。本文通过分析国外研制的光生物反应器系统的结构单元,阐述在这一研究领域的设计思路,主要问题及发展方向。 相似文献
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Ranjbar R Inoue R Katsuda T Yamaji H Katoh S 《Journal of Bioscience and Bioengineering》2008,106(2):204-207
In photobioreactors, photosynthetic microorganisms are exposed to certain light/dark cycles caused by light intensity distribution and mixing inside the photobioreactor. In this study, Haematococcus pluvialis was cultivated in an airlift and a bubble column photobioreactor, and the cell growth and astaxanthin production were compared to clarify the effects of liquid circulation. 相似文献
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利用优化了的海水培养基和简易光生物反应器对紫球藻进行培养,建立了一套从培养液中直接分离纯化紫球藻多糖(PSP)的工艺,并对纯化后的PSP进行了初步分析。实验表明,本方法培养的紫球藻生物量达到了干重2.1g/L,分离后粗PSP产量为0.378g/L,离子交换得率约为78%。经气相色谱分析PSP主要由木糖、葡萄糖和半乳糖组成,质量比约为13.68:7.83:5.23。红外光谱显示该多糖具有一般多糖的特征吸收峰,其中六碳糖为吡喃型。PSP为硫酸酯化多糖,硫酸基团含量约为4%。 相似文献
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Yegani R Yoshimura S Moriya K Katsuda T Katoh S 《Journal of Bioscience and Bioengineering》2005,100(6):672-677
Using a semicontinuous culture method, in which operational parameters such as cell concentration and light intensity distribution were maintained almost constant, instability of the specific growth rate of Rhodobacter capsulatus B-100, a purple bacterium, was observed to be similar to that of R. capsulatus ST-410 when cultivated under high ratios of light intensity on the illuminated side to that of the transmitted light. Such instability was not observed in the cultivation of Chlorella vulgaris, a eukaryotic green alga, even at higher cell concentrations. Under the same conditions, the increase in only the ferrous concentration from 43 microM, the concentration in the original RCV medium, to 172 microM sustained a stable growth, whereas Fe(2+) was slightly consumed during the cultivation. Supplemental illumination with a fluorescent lamp on the transmitted side of a flat plate photobioreactor sustained a moderate level of stable growth, while a halogen lamp slightly affected the growth stability. Our results showed that an increase in Fe(2+) concentration or supplemental illumination improves the growth stability of R. capsulatus. 相似文献
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A helix tube photobioreactor with a volume of 10 L was designed and manufactured. The facade of the reactor was designed as
three-layer frame. The illumination helixes units were 16, illumination area volume was 1.5 L, illuminate specific area was
95 m−1. A marine micro-alga Dunaliella salina was used as a model organism in this study. Results showed that the optimum inoculum concentration was OD630 = 0.15 and the optimum circulation rate of culture fluid was 630 mL/h for the bioreactor. In continuous cultivation, in order
to determine the optimum collection of alga solution for the highest yield of β-carotene, three different alga solution collection
and addition fresh culture medium volumes were applied: 0.8, 1.5, 2.0 L/day. The biomass and extraction of β-carotene were
determined in different cultivation periods. The result suggested that the optimum daily harvest of alga solution was 1.5 L/day
for the cultivation of D. salina to obtain the highest production of β-carotene. 相似文献