Hydrodynamic Characteristics in an External Loop Airlift Bioreactor Containing a Spinning Sparger and a Packed Bed

2002 ◽  
Vol 41 (9) ◽  
pp. 2124-2128 ◽  
Author(s):  
Annie X. Meng ◽  
Gordon A. Hill ◽  
Ajay K. Dalai
Keyword(s):  
Packed Bed ◽  
Airlift Bioreactor ◽  
Hydrodynamic Characteristics ◽  
External Loop

Nitrogen compounds removal in a packed bed external loop airlift bioreactor

2005 ◽  
Vol 22 (3) ◽  
pp. 393-398 ◽  
Author(s):  
Siriwan Silapakul ◽  
Sorawit Powtongsook ◽  
Prasert Pavasant
Keyword(s):  
Packed Bed ◽  
Airlift Bioreactor ◽  
Nitrogen Compounds ◽  
External Loop

Hydrodynamics in the packed bed of the anaerobic fixed film reactor

1996 ◽  
Vol 33 (8) ◽  
pp. 1-6 ◽  
Author(s):  
H. Chua ◽  
J. P. C. Fung
Keyword(s):  
Dispersion Model ◽  
High Strength ◽  
Packed Bed ◽  
Effluent Treatment ◽  
Hydrodynamic Characteristics ◽  
Support Medium ◽  
Fixed Film ◽  
Film Reactor ◽  
Back Mixing ◽  
Intermediate Amount

The anaerobic fixed film reactors (AFFR), containing a mixed population of bacteria immobilized on the surfaces of expanded-clay support medium, have been successfully applied in the simulation of high-strength trade effluent treatment. This paper presents residence time distribution (RTD) studies to investigate the hydrodynamic characteristics in the packed bed of this novel type of reactor under the mixing effects of an effluent recycle stream. The results show that the flow pattern is characterized by various extents of back-mixing as predicted by the dispersion model. An effluent recycle at a rate equivalent to replacing the liquid content of the AFFR three times per hour achieved a large amount of dispersion in the packed bed. The AFFR without recycle had an intermediate amount of dispersion. This study shows that treatment performance of AFFRs and the cause of reactor failure are related to the effects of the effluent recycle in diluting and distributing the organic constituents of the trade effluent.

scholarly journals Effect of packed bed on mass transfer in external-loop airlift bubble column.

1996 ◽  
Vol 29 (4) ◽  
pp. 582-587 ◽  
Author(s):  
Kenji Okada ◽  
Yoshiko Nagata ◽  
Yasuharu Akagi
Keyword(s):  
Mass Transfer ◽  
Bubble Column ◽  
Packed Bed ◽  
External Loop
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