Effects of electron donors and inhibitors on reductive dechlorination of 2,4,6-trichlorophenol

Perkins, Patricia S.; Komisar, Simeon J.; Puhakka, Jaakko A.; Ferguson, John F.

doi:10.1016/0043-1354(94)90020-5

Cited by 61 publications

(27 citation statements)

References 22 publications

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“…They are also used to control and predict the plant design performance for optimizing the plant design. Gu and Knaebel studied the degradation kinetics of pentachlorophenol (PCP) (Gu et al, 1995;Perkins et al, 1994). Ning et al (1997) investigated the degradation of 2,4 DCP using a modified Haldane inhibition kinetic model to estimate the performance of anaerobic sludge granules in an anaerobic digester (Ning et al, 1997).…”

Section: Introductionmentioning

confidence: 99%

Kinetic of carbonaceous substrate in an upflow anaerobic sludge sludge blanket (UASB) reactor treating 2,4 dichlorophenol (2,4 DCP)

Sponza

Uluköy

2008

Journal of Environmental Management

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Section: Introductionmentioning

confidence: 99%

Kinetic of carbonaceous substrate in an upflow anaerobic sludge sludge blanket (UASB) reactor treating 2,4 dichlorophenol (2,4 DCP)

Sponza

Uluköy

2008

Journal of Environmental Management

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“…Positive influence of methanogenesis on dechlorination has been described for degradation of chlorinated ethenes (Adamson et al 2003;Bradley & Chapelle 1999;Freedman & Gossett 1989;Skeen et al 1995), polychlorinated biphenyls (Kim & Rhee 1999), chlorinated phenols (Perkins et al 1994) and chloroform (Yu & Smith 1997), the latter potentially accounted for by cofactors such as F 430 or vitamin B 12 . However, interpretation of these findings has been complicated by the fact that the methanogenic inhibitor 2-Bromoethanesulfonate (BES) which is frequently employed to evaluate the role of methanogens can also be an inhibitor of reductive dechlorination (Lo¨ffler et al 1997).…”

Section: Resultsmentioning

confidence: 96%

Dynamics of reductive TCE dechlorination in two distinct H2 supply scenarios and at various temperatures

et al. 2006

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Anaerobic microbial dechlorination of trichloroethene (TCE) by a mixed, Dehalococcoides containing culture was investigated at different temperatures (4-60 degrees C) using propionate and lactate as a slow- and fast-releasing hydrogen (H(2)) source, respectively. Distinct temperature-dependent dynamics of substrate fermentation and H(2) levels could explain observed patterns of dechlorination. While varying the temperature caused changes in rate, the overall pattern of dechlorination was characteristic of the supplied electron donor. Feeding cultures with a rapidly fermentable substrate such as lactate generally resulted in high H(2) concentrations and fast and complete dechlorination accompanied by rapid methanogenesis. In contrast, low H(2) release rates resulting from fermentation of propionate were associated with 2 to 3-fold longer time frames necessary for complete dechlorination at intermediate temperatures (15-30 degrees C). A lag-phase prior to dechlorination of cis-dichloroethene (cDCE), together with a characteristic build-up of H(2) and methane, was consistently observed at slow H(2) supply. At temperatures of 10 degrees C and lower, the system remained in this lag phase and no dechlorination past cDCE was observed within the experimental time frame. However, when lactate was the substrate, complete dechlorination of TCE occurred within 74 days at 10 degrees C, accompanied by methane production. The choice of fermentable substrate decisively influenced the rate and degree of dechlorination at an electron donor/TCE ratio as high as 666:1. Temperature-dependent H(2) levels resulting from fermentation of different substrates could be satisfactorily explained through thermodynamic calculations of the Gibbs free energy yield assuming a constant metabolic energy threshold of -20 kJ/(mol reaction).

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“…Total suspended solids and volatile suspended solids were measured as described in Standard Methods for the Examination of Water and Wastewater (Eaton et al, 1995). Chlorophenol samples were prepared for gas-chromatographic analysis with a modification of the acetylation and extraction method developed by Voss et al (1981), Perkins et al (1994), and described elsewhere (Stuart and Woods, 1998). Acetylated chlorophenols extracted in hexane were analyzed using a Hewlett-Packard model 5890 gas chromatograph with an electron-capture detector (Stuart and Woods, 1998).…”

Section: Analytical Techniquesmentioning

confidence: 99%

The effect of redox potential changes on reductive dechlorination of pentachlorophenol and the degradation of acetate by a mixed, methanogenic culture

Stuart¹,

Woods²,

Lemmon³

et al. 1999

Biotechnol. Bioeng.

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Effects of electron donors and inhibitors on reductive dechlorination of 2,4,6-trichlorophenol

Cited by 61 publications

References 22 publications

Kinetic of carbonaceous substrate in an upflow anaerobic sludge sludge blanket (UASB) reactor treating 2,4 dichlorophenol (2,4 DCP)

Kinetic of carbonaceous substrate in an upflow anaerobic sludge sludge blanket (UASB) reactor treating 2,4 dichlorophenol (2,4 DCP)

Dynamics of reductive TCE dechlorination in two distinct H2 supply scenarios and at various temperatures

The effect of redox potential changes on reductive dechlorination of pentachlorophenol and the degradation of acetate by a mixed, methanogenic culture

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