Dual substrate limitations in upflow packed-bed biofilm reactors — a theoretical study

1997 ◽  
Vol 20 (1) ◽  
pp. 10-16 ◽  
Author(s):  
Shafkat Ali Beg ◽  
Mirza Manirul Hassan ◽  
Muhammad Arshad Saeed Chaudhry
Keyword(s):  
Theoretical Study ◽  
Packed Bed ◽  
Biofilm Reactors ◽  
Dual Substrate

Cometabolism in biofilm reactors

1995 ◽  
Vol 31 (1) ◽  
pp. 215-225 ◽  
Author(s):  
Gerald E. Speitel ◽  
Robert L. Segar
Keyword(s):  
Chlorinated Solvents ◽  
Packed Bed ◽  
Operating Conditions ◽  
Mixed Cultures ◽  
Treatment Technology ◽  
Hydraulic Residence Time ◽  
Slow Growth Rate ◽  
Biofilm Reactors ◽  
Aerobic Cometabolism ◽  
Degrading Bacteria

Aerobic cometabolism of chlorinated aliphatic solvents in biofilm reactors is a potential treatment technology for contaminated water and air streams. This research investigated cometabolism by pure and mixed cultures of methanotrophs and mixed cultures of phenol-degrading bacteria. Initial experiments with continuous-flow, packed-bed bioreactors proved unsuccessful; therefore, the major focus of the work was on sequencing biofilm reactors, which cycle between two modes of operation, degradation of chlorinated solvents and rejuvenation of the microbial population. Particular success was obtained with a mixed culture of phenol degraders in the treatment of chlorinated ethenes (e.g., trichloroethylene - TCE). Under the best operating conditions, 90% removal of TCE occurred at a 14-minute packed-bed hydraulic residence time. The bioreactors required only two, 1.5 h biomass rejuvenation periods per day to sustain this removal. Experiments with Methylosinus trichosporium OB3b were less successful because of the organism's slow growth rate, relatively poor ability to attach to surfaces, and its inability to successfully compete with other methanotrophs in the bioreactor environment. Overall, however, the research demonstrated the potential attractiveness of sequencing biofilm reactors in treating water contaminated with chlorinated solvents.

Simplified models for packed-bed biofilm reactors

1989 ◽  
Vol 33 (2) ◽  
pp. 164-172 ◽  
Author(s):  
Christopher T. Skowlund ◽  
Dale W. Kirmse
Keyword(s):  
Packed Bed ◽  
Simplified Models ◽  
Biofilm Reactors

Atrazine biodegradation by a bacterial community immobilized in two types of packed-bed biofilm reactors

2009 ◽  
Vol 25 (12) ◽  
pp. 2195-2204 ◽  
Author(s):  
Alberto Macías-Flores ◽  
Angélica Tafoya-Garnica ◽  
Nora Ruiz-Ordaz ◽  
Angélica Salmerón-Alcocer ◽  
Cleotilde Juárez-Ramírez ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Packed Bed ◽  
Biofilm Reactors

Butanol production by Clostridium acetobutylicum in a series of packed bed biofilm reactors

2016 ◽  
Vol 152 ◽  
pp. 678-688 ◽  
Author(s):  
F. Raganati ◽  
A. Procentese ◽  
G. Olivieri ◽  
M.E. Russo ◽  
P. Gotz ◽  
...  
Keyword(s):  
Clostridium Acetobutylicum ◽  
Packed Bed ◽  
Butanol Production ◽  
Biofilm Reactors

scholarly journals Kinetics of oxalate degradation in aerated packed-bed biofilm reactors under nitrogen supplemented and deficient conditions

2019 ◽  
Vol 211 ◽  
pp. 270-280
Author(s):  
Tharanga N. Weerasinghe Mohottige ◽  
Anna H. Kaksonen ◽  
Ka Yu Cheng ◽  
Ranjan Sarukkalige ◽  
Maneesha P. Ginige
Keyword(s):  
Packed Bed ◽  
Biofilm Reactors ◽  
Kinetics Of
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