Integrated anaerobic‐aerobic process for the biodegradation of chlorinated aromatic compounds

Armenante, Piero M.; Kafkewitz, David; Lewandowski, G. A.; Kung, Cheng-Ming

doi:10.1002/ep.670110217

Cited by 37 publications

(18 citation statements)

References 20 publications

(4 reference statements)

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“…One of the chlorophenols widely used as a wood preservative, 2, 4, 6-trichlorophenol (TOP), can be partially dechlorinated to 4-chlorophenol (4-CP) by anaerobic microorganisms (Armenante et al, 1992;Madsen and Aamand, 1992;Mohn and Kennedy, 1992) that are normally present in nature. Since 4-CF is stable against biological degradation in anaerobic conditions (Woods et al, 1989), TCP-contaminated sites tend to contain a mixture of TCP, 4-CP, and other compounds such as phenol.…”

Section: -Chlorophenol;mentioning

confidence: 99%

Biodegradation of the mixture of 2,4,6-trichlorophenol, 4-chlorophenol, and phenol by a defined mixed culture.

Bae

Lee

1997

J. Gen. Appl. Microbiol.

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KoreaTwo new strains, Pseudomonas sp. TCP114 degrading 2, 4, 6-trichlorophenol (TCP) and Arthrobacter sp. CPR706 degrading 4-chlorophenol (4-CP), were isolated through a selective enrichment procedure. Both strains could also degrade phenol. The degradability of one component by a pure culture was strongly affected by the presence of other compounds in the medium. For example, when all three components (TCP, 4-CP, and phenol) were present in the medium, a pure culture of CPR706 could not degrade any of the components present. This restriction on degradability could be overcome by employing a defined mixed culture of the two strains. The mixed culture could degrade all three components in the mixture through cooperative activity. It was also demonstrated that the mixed culture could be immobilized by using calcium alginate for the semi-continuous degradation of the three-component mixture. Immobilization not only accelerates the degradation rate, but also enables reuse of the cell mass several times without losing the cells' degrading capabilities.

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Section: -Chlorophenol;mentioning

confidence: 99%

Biodegradation of the mixture of 2,4,6-trichlorophenol, 4-chlorophenol, and phenol by a defined mixed culture.

Bae

Lee

1997

J. Gen. Appl. Microbiol.

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“…Because most of anaerobic microorganisms could not use chlorophenols as a sole carbon source for their growth, it is necessary to supply other external carbon sources serving as electron donor for microbial growth and biosynthesis [21][22][23]. The mineralization of chlorinated compounds could be achieved by the combined activities of anaerobic and aerobic bacteria in which dechlorination occurred primarily under anaerobic conditions and degradation of the less chlorinated intermediates occurred more readily under aerobic conditions [3,5,9,[24][25][26][27][28][29]. In order to overcome toxic effects of chlorophenols, immobilized cell or biofilm reactors were used recently [30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

“…Although the majority of chlorophenolsdegrading microorganisms have the necessary enzymes for aromatic ring degradation, they have a limited capacity for halogen removal [7]. Therefore, the degradation efficiency of these recalcitrant toxic chlorophenols depends mainly on the microbial capacity to remove the halogen groups [9,10].…”

Section: Introductionmentioning

confidence: 99%

High efficiency of batch operated biofilm hydrolytic–aerobic recycling process in degradation of 2,4-dichlorophenol

Wang

et al. 2008

Journal of Hazardous Materials

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“…Although majority of microorganisms degrading chlorophenols need the action of enzymes for the degradation of aromatic ring, because the microorganisms only have a limited capacity for halogen removal. Therefore, the degradation of these toxic chlorophenols depends mainly on the microbial capacity to remove the halogen groups (Armenante et al 1992;Sander et al 1991).…”

Section: Introductionmentioning

confidence: 99%

Biofilm-electrode process with high efficiency for degradation of 2,4-dichlorophenol

et al. 2010

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2,4-Dichlorophenol (2,4-DCP) from chemical industry wastewaters has caused serious environmental pollution. Removal of 2,4-DCP using either physicochemical or biological methods is not very efficient. In this paper, a combination of biological and electrochemical methods gave satisfactory results. By comparisons of the degradation of 2,4-DCP and the removal of chemical oxygen demand (COD) in electrochemical, biological and biofilm-electrode processes, it was found that the biofilmelectrode process possesses the highest degradation efficiency and removal rate; both the pure electrochemical and the pure biological processes were far less efficient. The removal efficiency of 2,4-DCP using the biofilm-electrode process was 100% in 48 h, while that using the pure electrochemical and the pure biological processes were 62 and 42%, respectively. The experiments show that the current of 5 mA for the cathode of 9 cm 2 and the initial concentration 100 mg/l of 2,4-DCP were the optimal parameters of technology for the biofilm-electrode process. The excellent effects are due to the withdrawing electron action of bacterium, electrochemically anodic oxidation and cathodic dechlorination. It is the first time that the biofilm-electrode method was applied in 2,4-DCP degradation. Here, we demonstrated that biofilm-electrode process is a promising method to remove some aromatic compounds in industrial wastewater.

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Integrated anaerobic‐aerobic process for the biodegradation of chlorinated aromatic compounds

Abstract: An inteyruted anaerobic-aerobic process for the complete mineralization of 2,4,6-trichlorophenol (used in

Cited by 37 publications

References 20 publications

Biodegradation of the mixture of 2,4,6-trichlorophenol, 4-chlorophenol, and phenol by a defined mixed culture.

Biodegradation of the mixture of 2,4,6-trichlorophenol, 4-chlorophenol, and phenol by a defined mixed culture.

High efficiency of batch operated biofilm hydrolytic–aerobic recycling process in degradation of 2,4-dichlorophenol

Biofilm-electrode process with high efficiency for degradation of 2,4-dichlorophenol

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