Biodegradation of Polyethoxylated Nonylphenols in Packed-Bed Biofilm Reactors

2007 ◽  
Vol 46 (21) ◽  
pp. 6681-6687 ◽  
Author(s):  
Lorenzo Bertin ◽  
Diana Di Gioia ◽  
Claudia Barberio ◽  
Laura Salvadori ◽  
Leonardo Marchetti ◽  
...  
Keyword(s):  
Packed Bed ◽  
Biofilm Reactors

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

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

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

Packed Bed Biofilm Reactors: Simplified Model

1981 ◽  
Vol 107 (2) ◽  
pp. 307-317
Author(s):  
Alain D. Meunier ◽  
Kenneth J. Williamson
Keyword(s):  
Packed Bed ◽  
Simplified Model ◽  
Biofilm Reactors

Packed Bed Biofilm Reactors: Design

1981 ◽  
Vol 107 (2) ◽  
pp. 319-338
Author(s):  
Alain D. Meunier ◽  
Kenneth J. Williamson
Keyword(s):  
Packed Bed ◽  
Biofilm Reactors

Inhibitory effect of the xenobiotic 1,2-dichloroethane in a nitrifying biofilm reactor

2007 ◽  
Vol 55 (8-9) ◽  
pp. 67-73 ◽  
Author(s):  
B. Alpaslan Kocamemi ◽  
F. Çeçen
Keyword(s):  
Packed Bed ◽  
Inhibitory Effect ◽  
Biofilm Reactor ◽  
Biofilm Reactors ◽  
Cometabolic Degradation ◽  
Potential Use

The aim was to investigate the inhibitory effect of the xenobiotic 1,2-DCA on nitrification during the cometabolic degradation in a packed bed nitrifying biofilm reactor. This xenobiotic inhibited primarily the conversion of NH4-N to hydroxylamine by binding to the AMO enzyme. It had no inhibitory effect on the conversion of nitrite to nitrate. At high NH4-N loadings, the presence of 1,2-DCA inhibited NH4-N utilisation more severely than at low loadings. The suppressing effect of 1,2-DCA on NH4-N utilisation was found to be reversible due to the ability of cells to recover from inhibition. These results could fill a gap in the literature about the potential use of nitrifying biofilm systems for cometabolic treatment of 1,2-DCA and could be useful in the design of engineered 1,2-DCA remediation/treatment in biofilm reactors.

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