当前位置: X-MOL 学术Biotechnol. Adv. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Effects of shear stress on microalgae – A review
Biotechnology Advances ( IF 16.0 ) Pub Date : 2018-03-07 , DOI: 10.1016/j.biotechadv.2018.03.001
Chinchin Wang , Christopher Q. Lan

Cultivation of microalgae requires consideration of shear stress, which is generated by operations such as mixing, circulation, aeration and pumping that are designed to facilitate mass and heat transfer as well as light distribution in cultures. Excessive shear stress can cause increased cell mortality, decreased growth rate and cell viability, or even cell lysis. This review examines the sources of shear stress in different cultivation systems, shear stress tolerance of different microalgal species and the physiological factors and environmental conditions that may affect shear sensitivity, and potential approaches to mitigate the detrimental effects of shear stress. In general, green algae have the greatest tolerance to shear stress, followed by cyanobacteria, haptophytes, red algae, and diatoms, with dinoflagellates comprising the most shear-sensitive species. The shear-sensitivity of microalgae is determined primarily by cell wall strength, cell morphology and the presence of flagella. Turbulence, eddy size, and viscosity are the most prominent parameters affecting shear stress to microalgal cells during cultivation.



中文翻译:

剪应力对微藻的影响-综述

微藻的培养需要考虑剪切应力,该剪切应力是由混合,循环,曝气和泵送等操作产生的,这些操作旨在促进物质和热量的传递以及培养物中的光分布。剪切应力过大会导致细胞死亡率增加,生长速率和细胞活力下降,甚至细胞裂解。这篇综述研究了不同栽培体系中剪应力的来源,不同微藻种的剪应力耐受性以及可能影响剪敏感性的生理因素和环境条件,以及减轻剪应力有害影响的潜在方法。通常,绿藻对剪切应力的耐受性最大,其次是蓝细菌,触藻,红藻和硅藻,含有鞭毛最敏感的物种的鞭毛。微藻的剪切敏感性主要取决于细胞壁强度,细胞形态和鞭毛的存在。在培养过程中,湍流,涡流大小和粘度是影响微藻细胞剪切应力的最主要参数。

更新日期:2018-03-07
down
wechat
bug