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A temporary immersion plant propagation bioreactor with decoupled gas and liquid flows for enhanced control of gas phase

机译：临时浸没式植物繁殖生物反应器，具有分离的气体和液体流，可增强对气相的控制

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摘要

Temporary immersion bioreactors (TIBs) are being used to propagate superior plant species on a commercial scale. We demonstrate a new TIB design, a Hydrostatic-driven TIB (Hy-TIB), where periodic raising and lowering the media reservoir maintains the advantages of temporary immersion of plant tissues without requiring large amounts of gas to move the media that is a characteristic of other TIB designs. The advantage of utilizing low volumes of gas mixtures (that are more expensive than air) is shown by a doubling of the growth rate of plant root cultures under elevated (40%) oxygen in air, and with CO2 supplementation showing improved phototrophic and photomixotrophic growth of seedless watermelon meristem cultures. The development of this bioreactor system involved overcoming contamination issues associated with utilizing very low gas flow rates and included utilizing microchip pressure sensors to diagnose unexpected changes in internal bioreactor pressure (+/- 20 Pa approximate to 0.0002 atm) caused by flexing of non-rigid plastic bag vessels. The overall design seeks to achieve versatility, scalability and minimum cost such that bioreactor technology can play an increasing role in the critical need to improve plant productivity in the face of increasing demand for food, reduced resources, and environmental degradation. (c) 2016 American Institute of Chemical Engineers Biotechnol. Prog., 32:337-345, 2016
机译：临时浸入式生物反应器（TIB）已用于以商业规模繁殖优质植物。我们展示了一种新的TIB设计，​​即静液压驱动的TIB（Hy-TIB），其中定期升高和降低培养基储液罐可保持植物组织暂时浸没的优势，而无需大量气体来移动培养基，这是该产品的一个特点其他TIB设计。利用少量混合气（比空气贵）的优势表现为：在空气中氧气含量升高（40％）的情况下，植物根系培养物的生长速度增加了一倍，而补充CO2则显示出了光养和光养养生的改善种无籽西瓜分生组织。这种生物反应器系统的开发涉及克服与利用非常低的气体流速相关的污染问题，并且包括利用微芯片压力传感器来诊断由非刚性的挠曲引起的内部生物反应器压力的意外变化（+/- 20 Pa约0.0002 atm）。塑料袋容器。总体设计旨在实现多功能性，可扩展性和最低成本，以使生物反应器技术在面对食品需求增加，资源减少和环境恶化的关键需求中，在提高植物生产力的关键需求中发挥越来越重要的作用。 （c）2016美国化学工程师学会生物技术学会。 Prog。，32：337-345，2016

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