scholarly journals Anaerobic degradation of toluene by pure cultures of denitrifying bacteria

1991 ◽  
Vol 157 (1) ◽  
Author(s):  
RietJ. Schocher ◽  
Birgit Seyfried ◽  
Francisco Vazquez ◽  
Josef Zeyer
Keyword(s):  
Anaerobic Degradation ◽  
Denitrifying Bacteria ◽  
Pure Cultures

Isolation and Characterization of Paraquat-Degrading Extracellular Humus-Reducing Bacteria from Vegetable Field

2013 ◽  
Vol 807-809 ◽  
pp. 1026-1030 ◽  
Author(s):  
Chun Yuan Wu ◽  
Jin Kun Liu ◽  
Shan Shan Chen ◽  
Xiao Deng ◽  
Qin Fen Li
Keyword(s):  
Electron Acceptor ◽  
Anaerobic Degradation ◽  
Anaerobic Bacteria ◽  
Organic Substrate ◽  
Isolation And Characterization ◽  
Vegetable Soil ◽  
Pure Cultures ◽  
Degradation Activity ◽  
Facultative Anaerobic Bacteria ◽  
Reducing Bacteria

The aim of this paper is to isolate pure cultures that are capable of degrading paraquat (PQ) anaerobically with humic substances (humus) as the sole electron acceptor. Three facultative anaerobic bacteria (PQ-1, PQ-2, and PQ-3) were successively isolated from vegetable soil in Sanya city, China, via enrichment procedure with PQ and anthraquinone-2,6-disulphonate (AQDS) under anaerobic conditions. Batch experiments were conducted to investigate isolates PQ anaerobic degradation activity. Results showed that three strains were all capable of degrading PQ directly with AQDS as the sole electron acceptor (18.6% removal within 48h), and the microbial process might be AQDS dependent. The addition of low molecular weight organic substrate, such as sucrose, could enhance the anaerobic degradation of PQ from 18.6% to 34.2%, and the degradation rate reached 100% after 5-day incubation. This study was the first paper reporting that pure cultures have the ability to anaerobically degrade PQ with AQDS as the sole electron acceptor.

Anaerobic degradation of cresols by denitrifying bacteria

1991 ◽  
Vol 155 (3) ◽  
pp. 238-248 ◽  
Author(s):  
Angelika Rudolphi ◽  
Andreas Tschech ◽  
Georg Fuchs
Keyword(s):  
Anaerobic Degradation ◽  
Denitrifying Bacteria

Kinetics of pure cultures of hydrogen-oxidizing denitrifying bacteria and modeling of the interactions among them in mixed cultures

2006 ◽  
Vol 95 (3) ◽  
pp. 513-525 ◽  
Author(s):  
I.A. Vasiliadou ◽  
S. Siozios ◽  
I.T. Papadas ◽  
K. Bourtzis ◽  
S. Pavlou ◽  
...  
Keyword(s):  
Denitrifying Bacteria ◽  
Mixed Cultures ◽  
Pure Cultures ◽  
Kinetics Of

Anaerobic Degradation of Benzene and Polycyclic Aromatic Hydrocarbons

2016 ◽  
Vol 26 (1-3) ◽  
pp. 92-118 ◽  
Author(s):  
Rainer U. Meckenstock ◽  
Matthias Boll ◽  
Housna Mouttaki ◽  
Janina S. Koelschbach ◽  
Paola Cunha Tarouco ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Anaerobic Degradation ◽  
Isotope Analysis ◽  
Degradation Pathways ◽  
Batch Cultures ◽  
Polycyclic Aromatic ◽  
Pure Cultures ◽  
Biochemical Level ◽  
Microcosm Studies

Aromatic hydrocarbons such as benzene and polycyclic aromatic hydrocarbons (PAHs) are very slowly degraded without molecular oxygen. Here, we review the recent advances in the elucidation of the first known degradation pathways of these environmental hazards. Anaerobic degradation of benzene and PAHs has been successfully documented in the environment by metabolite analysis, compound-specific isotope analysis and microcosm studies. Subsequently, also enrichments and pure cultures were obtained that anaerobically degrade benzene, naphthalene or methylnaphthalene, and even phenanthrene, the largest PAH currently known to be degradable under anoxic conditions. Although such cultures grow very slowly, with doubling times of around 2 weeks, and produce only very little biomass in batch cultures, successful proteogenomic, transcriptomic and biochemical studies revealed novel degradation pathways with exciting biochemical reactions such as for example the carboxylation of naphthalene or the ATP-independent reduction of naphthoyl-coenzyme A. The elucidation of the first anaerobic degradation pathways of naphthalene and methylnaphthalene at the genetic and biochemical level now opens the door to studying the anaerobic metabolism and ecology of anaerobic PAH degraders. This will contribute to assessing the fate of one of the most important contaminant classes in anoxic sediments and aquifers.

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