Comparison between entrapment methods for phenol removal and operation of bioreactor packed with co-entrapped activated carbon and Pseudomonas fluorescence KNU417

Kwon, Kyung Han; Jung, Kyeong Youl; Yeom, Sung Ho

doi:10.1007/s00449-008-0245-1

Cited by 16 publications

(8 citation statements)

References 11 publications

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“…A microorganism capable of utilization phenol as a sole carbon and energy source was isolated from crude oil contaminated soil and was identified as Pseudomonas fluorescence [4]. The microorganism was able to degrade many aromatic compounds such as phenol, benzene, toluene, benzoic acid, etc.…”

Section: Microorganismmentioning

confidence: 99%

“…However, since these compounds are toxic even at low levels, they have been placed in the list of priority pollutants by US EPA [3]. In 1991, phenol was accidentally discharged into the Nakdong river by an electronic company in Korea and this caused nationwide issues and consequently the company faced a buyer's strike [4]. This incident gave rise to the imposition of a strict regulation over toxic chemical discharge.…”

Section: Introductionmentioning

confidence: 98%

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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: Microorganismmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

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

Kwon

Yeom

2008

Bioprocess Biosyst Eng

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“…The latter problem was overcome by use of lower cytotoxic sodium orthophosphate in place of boric acid for crosslinking of PVA [15]. At present, PVA-sodium phosphate beads have been widely used for immobilization of microorganisms [14,19]. However, further reduction of cell damage resulting from the presence of phosphate and improvement of stability of the PVA-sodium phosphate beads are essential for successful application of the beads to bioremediation of contaminated wastewaters [20,21].…”

Section: Introductionmentioning

confidence: 99%

A comparison of sodium sulfate, sodium phosphate, and boric acid for preparation of immobilized Pseudomonas putida F1 in poly(vinyl alcohol) beads

et al. 2012

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Poly(vinyl alcohol) (PVA) gel beads crosslinked with sodium phosphate or boric acid have been widely utilized for microorganism immobilization. We previously utilized sodium sulfate to induce crosslinking of PVA for preparing immobilized yeast cells in PVA beads. In this study, we compared the toxicities of sodium sulfate and conventional crosslinkers (sodium phosphate and boric acid) toward Pseudomonas putida F1 (PpF1) and the performance of the corresponding immobilized PpF1 in PVA beads. The toxicity of sodium sulfate to PpF1 was lower than those of the conventional crosslinkers. PVA-sodium sulfate beads showed a higher gel fraction of PVA and a lower swelling ratio in water than PVA-sodium phosphate beads, which indicates that the former had higher stability. PpF1 immobilized in the PVA-sodium sulfate beads completely degraded the pollutant trichloroethylene (TCE) with an initial concentration (0.42 mg/l) within the most common range of TCE concentration found in contaminated field sites.

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“…In order to enhance the strength of the gel beads and stronger shock load, some auxiliary materials could be added. Active carbon (AC), a common and popular adsorbent, is used due to its large specific surface area, high porosity, porous structure, strong adsorption capacity [34,[38][39][40]. It is believed that an integrated immobilized SRB with inner nutrient + PVA-sodium boric containing silica, calcium carbonate and AC approach is a preferred and promising idea.…”

Section: Introductionmentioning

confidence: 99%

Enhanced biological stabilization of heavy metals in sediment using immobilized sulfate reducing bacteria beads with inner cohesive nutrient

Dai

Zhang

et al. 2017

Journal of Hazardous Materials

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A series of experiments were conducted for treating heavy metals contaminated sediments sampled from Xiangjiang River, which combined polyvinyl alcohol (PVA) and immobilized sulfate reducing bacteria (SRB) into beads. The sodium lactate was served as the inner cohesive nutrient. Coupling the activity of the SRB with PVA, along with the porous structure and huge specific surface area, provided a convenient channel for the transmission of matter and protected the cells against the toxicity of metals. This paper systematically investigated the stability of Cu, Zn, Pb and Cd and its mechanisms. The results revealed the performance of leaching toxicity was lower and the removal efficiencies of Cu, Zn, Pb and Cd were 76.3%, 95.6%, 100% and 91.2%, respectively. Recycling experiments showed the beads could be reused 5 times with superbly efficiency. These results were also confirmed by continuous extraction at the optimal conditions. Furthermore, X-ray diffraction (XRD) and energy-dispersive spectra (EDS) analysis indicated the heavy metals could be transformed into stable crystal texture. The stabilization of heavy metals was attributed to the carbonyl and acyl amino groups. Results presented that immobilized bacteria with inner nutrient were potentially and practically applied to multi-heavy-metal-contamination sediment.

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Comparison between entrapment methods for phenol removal and operation of bioreactor packed with co-entrapped activated carbon and Pseudomonas fluorescence KNU417

Cited by 16 publications

References 11 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

A comparison of sodium sulfate, sodium phosphate, and boric acid for preparation of immobilized Pseudomonas putida F1 in poly(vinyl alcohol) beads

Enhanced biological stabilization of heavy metals in sediment using immobilized sulfate reducing bacteria beads with inner cohesive nutrient

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