利用微泡定位超声能量来破坏藻类细胞。
Algal cell disruption using microbubbles to localize ultrasonic energy.
作者信息
Krehbiel Joel D, Schideman Lance C, King Daniel A, Freund Jonathan B
机构信息
Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, United States.
Department of Agricultural and Biological Engineering, University of Illinois at Urbana-Champaign, United States.
出版信息
Bioresour Technol. 2014 Dec;173:448-451. doi: 10.1016/j.biortech.2014.09.072. Epub 2014 Sep 22.
Microbubbles were added to an algal solution with the goal of improving cell disruption efficiency and the net energy balance for algal biofuel production. Experimental results showed that disruption increases with increasing peak rarefaction ultrasound pressure over the range studied: 1.90 to 3.07 MPa. Additionally, ultrasound cell disruption increased by up to 58% by adding microbubbles, with peak disruption occurring in the range of 10(8)microbubbles/ml. The localization of energy in space and time provided by the bubbles improve efficiency: energy requirements for such a process were estimated to be one-fourth of the available heat of combustion of algal biomass and one-fifth of currently used cell disruption methods. This increase in energy efficiency could make microbubble enhanced ultrasound viable for bioenergy applications and is expected to integrate well with current cell harvesting methods based upon dissolved air flotation.
为了提高细胞破碎效率以及藻类生物燃料生产的净能量平衡，向藻类溶液中添加了微泡。实验结果表明，在所研究的1.90至3.07MPa范围内，随着峰值稀疏超声压力的增加，破碎率也随之增加。此外，添加微泡后超声细胞破碎率提高了58%，在微泡浓度为10(8)个/毫升的范围内出现峰值破碎率。微泡在空间和时间上对能量的定位提高了效率：该过程所需的能量估计仅为藻类生物质燃烧可用热量的四分之一，以及当前使用的细胞破碎方法所需能量的五分之一。这种能量效率的提高使得微泡增强超声在生物能源应用中具有可行性，并且有望与基于溶解空气浮选的当前细胞收获方法良好整合。
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