Microfluidic study of effects of flow velocity and nutrient concentration on biofilm accumulation and adhesive strength in the flowing and no-flowing microchannels
Microfluidic study of effects of flow velocity and nutrient concentration on biofilm accumulation and adhesive strength in the flowing and no-flowing microchannels
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DOI：
10.1007/s10295-019-02161-x
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发表时间：
2019-06-01
影响因子：
3.4
通讯作者：
Bodtker, Gunhild
中科院分区：
文献类型：
--
作者：
Liu, Na;Skauge, Tormod;Bodtker, Gunhild
生物膜在多孔介质中的积累会导致孔隙堵塞，并改变多孔介质的许多物理性质。工程生物封堵可能在许多工业过程中有重要的应用，而关于多孔介质中生物膜在新潮时期积累的更好的知识通常与一系列行业以及环境和水研究具有广泛的相关性。在T形微通道上进行的显微成像实验结果表明，流体速度的增加有利于生物膜的生长，但在流速阈值以上，生物膜的脱落和生物膜的形成由于高剪应力而受到抑制。较高的营养浓度促进了生物膜的生长，但生成的生物膜粘附力较弱。本文概述了水动力环境中生物膜的发展，以便更好地预测和模拟石油工业、水文地质和净水中与多孔系统相关的生物堵塞过程。
Biofilm accumulation in porous media can cause pore plugging and change many of the physical properties of porous media. Engineering bioplugging may have significant applications for many industrial processes, while improved knowledge on biofilm accumulation in porous media at porescale in general has broad relevance for a range of industries as well as environmental and water research. The experimental results by means of microscopic imaging over a T-shape microchannel clearly show that increase in fluid velocity could facilitate biofilm growth, but that above a velocity threshold, biofilm detachment and inhibition of biofilm formation due to high shear stress were observed. High nutrient concentration prompts the biofilm growth; however, the generated biofilm displays a weak adhesive strength. This paper provides an overview of biofilm development in a hydrodynamic environment for better prediction and modelling of bioplugging processes associated with porous systems in petroleum industry, hydrogeology and water purification.