Continuous removal of ethanol from dilute ethanol-water mixtures using hot microbubbles.
Continuous removal of ethanol from dilute ethanol-water mixtures using hot microbubbles.
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DOI：
10.1016/j.cej.2021.130511
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发表时间：
2021-11-15
期刊：
影响因子：
--
通讯作者：
Hemaka Bandulasena HC
中科院分区：
文献类型：
--
作者：
Calverley J;Zimmerman WB;Leak DJ;Hemaka Bandulasena HC
利用热微泡连续去除稀混合物中的乙醇。乙醇浓度保持低于微生物TM 242的抑制阈值。汽提单元支持高达14.9 g L−1h−1的乙醇生产率。产物抑制是许多发酵过程（包括生物乙醇生产）的障碍，并且是导致稀释产物流的原因，所述稀释产物流是能量密集型的以进行纯化。本研究的主要目的是调查热微泡汽提是否可以用于连续地从生物反应器中预期的稀乙醇-水混合物中去除乙醇，并保持乙醇浓度低于嗜热副芽孢杆菌热葡萄糖苷酶（TM 242）的抑制水平，该嗜热副芽孢杆菌可以利用一系列来自木质纤维素生物质的糖。使用通过流体振荡产生热微泡云（~120 °C）的定制微泡汽提单元从保持在60 °C的~2%（v/v）乙醇-水混合物中去除乙醇。向装置中连续加入乙醇以模拟微生物代谢。初始液体高度和乙醇添加速率分别在10 - 50 mm和2.1-21.2 g h-1之间变化。在所有实验中，乙醇浓度均保持远低于靶生物的抑制阈值（约2% [v/v]）。该微泡汽提装置具有与0.5-1.0 L发酵罐结合操作的潜力，以允许14.9-7.8 g L-1h-1的乙醇生产率连续。
Continuous removal of ethanol from dilute mixtures using hot-microbubbles. Ethanol concentration maintained below the inhibition threshold for organism TM242. An ethanol productivity up to 14.9 g L−1h−1 was supported by the stripping unit. Product inhibition is a barrier to many fermentation processes, including bioethanol production, and is responsible for dilute product streams which are energy intensive to purify. The main purpose of this study was to investigate whether hot microbubble stripping could be used to remove ethanol continuously from dilute ethanol–water mixtures expected in a bioreactor and maintain ethanol concentrations below the inhibitory levels for the thermophile Parageobacillus thermoglucosidasius (TM242), that can utilize a range of sugars derived from lignocellulosic biomass. A custom-made microbubble stripping unit that produces clouds of hot microbubbles (~120 °C) by fluidic oscillation was used to remove ethanol from ~2% (v/v) ethanol–water mixtures maintained at 60 °C. Ethanol was continuously added to the unit to simulate microbial metabolism. The initial liquid height and the ethanol addition rate were varied from 10 to 50 mm and 2.1–21.2 g h−1 respectively. In all the experiments, ethanol concentration was maintained well below the inhibition threshold of the target organism (~2% [v/v]). This microbubble stripping unit has the potential to operate in conjunction with a 0.5–1.0 L fermenter to allow an ethanol productivity of 14.9–7.8 g L−1h−1 continuously.
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影响因子：
2.7
作者：
Al-yaqoobi, Atheer;Hogg, David;Zimmerman, William B.
通讯作者：
Zimmerman, William B.
影响因子：
2.1
作者：
GUY, C;CARREAU, PJ;PARIS, J
通讯作者：
PARIS, J
影响因子：
4.2
作者：
Calverley, Joseph;Zimmerman, William B.;Bandulasena, H. C. Hemaka
通讯作者：
Bandulasena, H. C. Hemaka
影响因子：
3.9
作者：
FLEMING, HP;DAESCHEL, MA;PIERSON, MD
通讯作者：
PIERSON, MD
影响因子：
4.7
作者：
Zimmerman, William B.;Al-Mashhadani, Mahmood K. H.;Bandulasena, H. C. Hemaka
通讯作者：
Bandulasena, H. C. Hemaka