Microbial adaptation in the degradation of phenol byAlcaligenes xylosoxidans Y234

Yeom, Sung Ho; Kim, Seung Ho; Yoo, Young Je; Yoo, In Sang

doi:10.1007/bf02706039

Cited by 17 publications

(6 citation statements)

References 15 publications

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“…They include adapting the cells to higher concentration of phenol [9], immobilization of the cell [10,11], and addition of other carbon sources such as yeast extract or glucose [7]. In our previous report, microbial pre-adaptation enhanced the degradation rate of aromatic compounds remarkably [12]. In addition, preadaptation to other compound such as benzene and toluene increased the degradation of phenol much more than the pre-adaptation to phenol [12].…”

Section: Introductionmentioning

confidence: 98%

“…In our previous report, microbial pre-adaptation enhanced the degradation rate of aromatic compounds remarkably [12]. In addition, preadaptation to other compound such as benzene and toluene increased the degradation of phenol much more than the pre-adaptation to phenol [12]. The mechanism of microbial adaptation was explained by the change of cell membrane [13].…”

Section: Introductionmentioning

confidence: 99%

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Optimal microbial adaptation routes for the rapid degradation of high concentration of phenol

Kwon

Yeom

2008

Bioprocess Biosyst Eng

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Pseudomonas fluorescence KNU417 was able to degrade up to 700 mg/L of phenol in 65 h but could not degrade 1,000 mg/L of phenol. Phenol degradation rate was noticeably enhanced by pre-adaptation. In addition, the cell was able to degrade up to 1,300 mg/L of phenol by pre-adapting to 700 mg/L of phenol. Repeated adaptations to the same concentration of phenol showed negligible increase in degradation rate. Also, relatively low concentration of phenol (100-700 mg/L) required only one pre-adaptation while high concentration (1,000 mg/L) did two consecutive stepwise pre-adaptations for rapid degradation. Optimal adaptation routes were suggested for the fast phenol degradation. For example, 1,000 mg/L of phenol was degraded as fast as in 48 h when the cell was pre-adapted to 100 and 300 mg/L of phenol sequentially. The mechanism of adaptation was explained in terms of catechol 1,2-dioxygenase induction, related to aromatic ring cleavage.

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Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Optimal microbial adaptation routes for the rapid degradation of high concentration of phenol

Kwon

Yeom

2008

Bioprocess Biosyst Eng

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“…35 Maliyekkal et al 44 found that the growth rates of precultured xylene and benzene cells in batch cultures were much faster when toluene was previously used as the sole carbon source.…”

Section: About Continuous or Discontinuous Acclimationmentioning

confidence: 99%

“…Toluene has been frequently used in literature to study microbial adaptation to chemically similar compounds such as benzene, ethyl benzene, and xylenes. Yeom et al 35 found that toluene adaptation increased the final degradation of phenol. Heipieper and de Bont 36 found that Pseudonoma putida S12 was more tolerant to ethanol when pre-adapted to toluene, which was explained by changes in the level of the fatty acid composition of cellular membranes.…”

Section: Introductionmentioning

confidence: 99%

Preliminary Acclimation Strategies for Successful Startup in Conventional Biofilters

Ηλίας

Gallastegi

Barona

et al. 2010

Journal of the Air & Waste Management Association

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The question of how to obtain the best inocula for conventional biofilters arises when an acclimation/adaptation procedure is to be applied. Bearing in mind that no standardized procedure for acclimating inocula exists, certain preliminary strategies for obtaining an active inoculum from wastewater treatment sludge are proposed in this work. Toluene was the contaminant to be degraded. Concerning the prior separation of sludge phases, no obvious advantage was found in separating the supernatant phase of the sludge before acclimation. As far as a continuous or discontinuous acclimation mode is concerned, the latter is recommended for rapidly obtaining acclimated sludge samples by operating the system for no longer than 1 month. The continuous mode rendered similar degradation rates, although it required longer operating time. Nevertheless, the great advantage of the continuous system lay in the absence of daily maintenance and the ready availability of the activated sample.

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“…The biodegradation of phenolics has been studied extensively in batch reactors [8][9][10][11][12] but not in airlift reactors. Some studies are as follows: Quan et al [4] performed a study using an internal loop airlift reactor immobilized with Achromobacter sp.…”

Section: Introductionmentioning

confidence: 99%

Studies on growth kinetics of predominantly Pseudomonas sp. in internal loop airlift bioreactor using phenol and m-cresol

Saravanan

Pakshirajan

Saha

2011

Korean J. Chem. Eng.

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Growth profile of predominantly Pseudomonas species was studied using wastewater containing phenol and m-cresol, as single and multi component systems in an internal loop airlift bioreactor (ILALR). The species utilized for the study was isolated from a wastewater treatment plant. The reactor was operated at both lower and higher hydraulic retention time (HRTs), 4.1 h and 8.3 h, respectively. The inlet phenol and concentration was varied between 100 and 800 mg/L with 800 mg/L as shock loading concentration for an HRT of 8.3 h. For 4.1 h HRT, the concentration was varied 100 and 500 mg/L using 500 mg/L as a shock loading concentration. The study showed complete degradation of both phenol and m-cresol, when present individually at an HRT of 8.3 h with an enriched biomass output. The specific growth rate of the culture at various phenol and m-cresol concentrations was fitted to a Monod model. The biokinetics value showed good potential of Pseudomonas species employing the internal loop air lift bioreactor in utilizing high strength phenolics containing wastewater. Culture growth profile with both phenol and m-cresol as mixtures also showed decreased lag times with complete utilization of the phenolics.

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Microbial adaptation in the degradation of phenol byAlcaligenes xylosoxidans Y234

Cited by 17 publications

References 15 publications

Optimal microbial adaptation routes for the rapid degradation of high concentration of phenol

Optimal microbial adaptation routes for the rapid degradation of high concentration of phenol

Preliminary Acclimation Strategies for Successful Startup in Conventional Biofilters

Studies on growth kinetics of predominantly Pseudomonas sp. in internal loop airlift bioreactor using phenol and m-cresol

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