The influence of polymeric membrane gas spargers on hydrodynamics and mass transfer in bubble column bioreactors

被引：21

作者：

Tirunehe, Gossaye ^{[1
]}

Norddahl, B. ^{[1
]}

机构：

[1] Univ Southern Denmark, Dept Chem Engn Biotechnol & Environm Technol, Campusvej 55, DK-5230 Odense M, Denmark

来源：

BIOPROCESS AND BIOSYSTEMS ENGINEERING | 2016年 / 39卷 / 04期

关键词：

Bubble column; Membrane sparger; Bubble size distribution; Interfacial area; Overall mass transfer coefficient; TRANSFER COEFFICIENTS; OXYGEN-TRANSFER; RISE VELOCITY; REACTORS; AIRLIFT; HOLDUP; SIZE; VISCOSITY; PERFORMANCE; PREDICTION;

D O I：

10.1007/s00449-016-1543-7

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：

Gas sparging performances of a flat sheet and tubular polymeric membranes were investigated in 3.1 m bubble column bioreactor operated in a semi batch mode. Air-water and air-CMC (Carboxymethyl cellulose) solutions of 0.5, 0.75 and 1.0 % w/w were used as interacting gas-liquid mediums. CMC solutions were employed in the study to simulate rheological properties of bioreactor broth. Gas holdup, bubble size distribution, interfacial area and gas-liquid mass transfer were studied in the homogeneous bubbly flow hydrodynamic regime with superficial gas velocity (U (G)) range of 0.0004-0.0025 m/s. The study indicated that the tubular membrane sparger produced the highest gas holdup and densely populated fine bubbles with narrow size distribution. An increase in liquid viscosity promoted a shift in bubble size distribution to large stable bubbles and smaller specific interfacial area. The tubular membrane sparger achieved greater interfacial area and an enhanced overall mass transfer coefficient (K (L)a) by a factor of 1.2-1.9 compared to the flat sheet membrane.

引用

页码：613 / 626

页数：14

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