Effects of shear stress on the microalgae Chaetoceros muelleri

被引：76

作者：

Michels, Michiel H. A. ^{[1
,2
]}

van der Goot, Atze J. ^{[3
]}

Norsker, Niels-Henrik ^{[1
]}

Wijffels, Rene H. ^{[1
]}

机构：

[1] Wageningen Univ, Bioproc Engn, NL-6700 EV Wageningen, Netherlands

[2] HZ Univ Appl Sci, NL-4380 AJ Vlissingen, Netherlands

[3] Wageningen Univ, Lab Food Proc Engn, NL-6700 EV Wageningen, Netherlands

来源：

BIOPROCESS AND BIOSYSTEMS ENGINEERING | 2010年 / 33卷 / 08期

关键词：

Microalgae; Chaetoceros muelleri; Shear stress; Viability; Aquaculture feed; Photobioreactor design; FLOW FILTRATION SYSTEMS; SMALL-SCALE SHEAR; DINOFLAGELLATE BIOLUMINESCENCE; PHAEODACTYLUM-TRICORNUTUM; HYDRODYNAMIC STRESS; CELL-SUSPENSIONS; PHOTOBIOREACTORS; CULTURES; GROWTH; BIOTECHNOLOGY;

D O I：

10.1007/s00449-010-0415-9

中图分类号：

Q81 [生物工程学（生物技术）]; Q93 [微生物学];

学科分类号：

071005 ; 0836 ; 090102 ; 100705 ;

摘要：

The effect of shear stress on the viability of Chaetoceros muelleri was studied using a combination of a rheometer and dedicated shearing devices. Different levels of shear stress were applied by varying the shear rates and the medium viscosities. It was possible to quantify the effect of shear stress over a wide range, whilst preserving laminar flow conditions through the use of a thickening agent. The threshold value at which the viability of algae was negatively influenced was between 1 and 1.3 Pa. Beyond the threshold value the viability decreased suddenly to values between 52 and 66%. The effect of shear stress was almost time independent compared to normal microalgae cultivation times. The main shear stress effect was obtained within 1 min, with a secondary effect of up to 8 min.

引用

页码：921 / 927

页数：7

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