Design of an airlift loop bioreactor and pilot scales studies with fluidic oscillator induced microbubbles for growth of a microalgae Dunaliella salina
Design of an airlift loop bioreactor and pilot scales studies with fluidic oscillator induced microbubbles for growth of a microalgae Dunaliella salina
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DOI：
10.1016/j.apenergy.2011.02.013
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发表时间：
2011-10
期刊：
影响因子：
11.2
通讯作者：
W. Zimmerman;M. Zandi;H. Bandulasena;V. Tesař;D. Gilmour;Ke-zhen Ying
中科院分区：
文献类型：
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作者：
W. Zimmerman;M. Zandi;H. Bandulasena;V. Tesař;D. Gilmour;Ke-zhen Ying
这项研究是为了测试在钢铁厂废气中生长微藻的可行性，钢铁厂废气是由钢铁加工废气燃烧产生的，具有高CO2含量。在气升式环流生物反应器中，通过微泡转移过程介导的分批藻类生物量生长的两个现场试验显示生物量仅稳定生长，存活率为100%。在2200 L生物反应器中的CO2吸收的气体分析表明，比吸收速率为0.1g/L/h，平均14%的CO2可利用的废气中的CO2的23%的组成。这种吸收导致生物反应器中叶绿素和总脂质成分的稳定生产，以及生物量的加速指数增长率，最高倍增时间为1.8d。气体分析还显示CO2吸收和O2产生的反相关性，这沿着由微泡将O2明显剥离到平衡水平，强烈表明生物反应器不受传质限制，也不受O2抑制。消除O2抑制导致生物质的高生长率和高密度。
This study was conducted to test the feasibility of growing microalgae on steel plant exhaust gas, generated from the combustion of offgases from steel processing, which has a high CO2content. Two field trials of batch algal biomass growth, mediated by microbubble transfer processes in an airlift loop bioreactor showed only steady growth of biomass with 100% survival rate. The gas analysis of CO2uptake in the 2200L bioreactor showed a specific uptake rate of 0.1g/L/h, an average 14% of the CO2available in the exhaust gas with a 23% composition of CO2. This uptake led to a steady production of chlorophyll and total lipid constituency in the bioreactor, and an accelerating exponential growth rate of biomass, with a top doubling time of 1.8days. The gas analysis also showed anti-correlation of CO2uptake and O2production, which along with the apparent stripping of the O2to the equilibrium level by the microbubbles, strongly suggests that the bioreactor is not mass transfer limited, nor O2inhibited. Removing O2inhibition results in high growth rates and high density of biomass.