Biodegradation of tetrahydrofuran by Pseudomonas oleovorans DT4 immobilized in calcium alginate beads impregnated with activated carbon fiber: Mass transfer effect and continuous treatment

Chen, Dongzhi; Fang, Jun-Yi; Shao, Qian; Ye, Jiexu; Ouyang, Du-Juan; Chen, Jianmeng

doi:10.1016/j.biortech.2013.04.037

Cited by 43 publications

(21 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The coefficient of alginate and PAC beads (2.25×10 −8 cm 2 s −1 ) was five times of magnitude larger than that of the alginate beads, indicating the significant enhancement of intraparticle diffusion by adding PAC. On the other hand, adding carbonaceous materials to matrix increases the mass transfer rate in the immobilized beads as obtained by others (Chen et al 2013;Massalha et al 2010). This increase may be due to enhancement of MO adsorption by the carbonaceous adsorbent.…”

Section: Discussionmentioning

confidence: 92%

“…The assumptions applied in this model are as follows: (i) MO decolorization occurs at every position within the immobilized cells, and the decolorization kinetics are of the same form as observed for fee cells; (ii) the immobilization matrices are spherical; (iii) mass transfer through the matrices via molecular diffusion, and no limitation occurs at the outside surface of matrices (Chen et al 2013). To solve Eq.…”

Section: Modelingmentioning

confidence: 99%

“…The diffusive mass transfer within the solid matrix is a limiting factor for the treatment process (Massalha et al 2010). Although some additives such as carbon nanomaterials and activated carbon fiber were reported to enhance the biodegradation rates by decreasing the diffusional limitation (Chen et al 2013;Mahmoodi et al 2014;Pang et al 2015), the more universal, abundant, inexpensive, and practical powered activated carbon (PAC) and nano-TiO 2 were chosen as additives to evaluate their influences on decolorization process in this study.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Decolorization characteristics of a newly isolated salt-tolerant Bacillus sp. strain and its application for azo dye-containing wastewater in immobilized form

Zhang

Tang

et al. 2015

Appl Microbiol Biotechnol

View full text Add to dashboard Cite

Strain CICC 23870 capable of decolorization of various azo dyes under high saline conditions was isolated from saline-alkali soil. The oxygen-insensitive azoreductase in crude extracts exhibited a wide substrate adaptively in the presence of NADH as a cofactor. The decolorization process by free cells followed first-order kinetics, with a high Methyl Orange (MO) tolerance concentration up to 100 mg l(-1) estimated by Haldane model. The average decolorization rate of free cell system was 26.30 mg g(-1) h(-1) at initial MO concentration of 32.7 mg l(-1). However, the values for the systems of immobilized cells (4 mm) in alginate, alginate and nano-TiO2, and alginate and powered activated carbon (PAC) were 6.83, 4.64, and 11.34 mg g(-1) h(-1), respectively. The effective diffusion factors in the tree different matrices were calculated by diffusion-based mathematic model. The diffusion step controls the overall decolorization rate, and the effective diffusion coefficients varied with internal structure of the bead matrices. The diffusion coefficients were increased from 4.98 × 10(-9) to 2.25 × 10(-8) cm(2) s(-1) when PAC was added, but decreased to 6.62 × 10(-10) cm(2) s(-1) when nano-TiO2 was added. The immobilized matrices could be reused for at least three cycles but with a decreased decolorization rate, possibly due to the breakage of beads at the end of each cycle, which led to the loss of immobilized bacteria.

show abstract

Section: Discussionmentioning

confidence: 92%

Section: Modelingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Decolorization characteristics of a newly isolated salt-tolerant Bacillus sp. strain and its application for azo dye-containing wastewater in immobilized form

Zhang

Tang

et al. 2015

Appl Microbiol Biotechnol

View full text Add to dashboard Cite

show abstract

“…Many natural polymeric matrices, such as agar [8] , alginate [9] , carrageenan [10,11] , chitosan [12] , and synthetic matrices, such as polyvinyl alcohol (PVA) [13,14] , cellulose [15,16] , polyurethane [9] and polyacrylonitrile [5,17] , have been used to immobilize microbes or enzymes in bioremediation systems, due to non-toxic or low toxicity to the biocatalysts. But affected by the poor swelling property [12,18] , some matrices like alginate gel and its derivatives or PVA [18,19] are easily damaged after reuse due to the presence of damaged internal cavity, distorted surface, or disintegrated support [20] . Especially when the temperature rises to 40 °C, the microbes could still keep alive, but the sodium alginate or PVA beads are damaged quickly at that temperature.…”

Section: Introductionmentioning

confidence: 99%

Novel porous polyethersulfone beads as matrix to immobilize Comamonas testosteroni sp. bdq06 in quinoline biodegradation

Geng

Zhu

et al. 2015

Chem. Res. Chin. Univ.

View full text Add to dashboard Cite

Novel matrix beads for the immobilization of strain Comamonas testosteroni sp. bdq06 to degrade quinoline were fabricated from polyethersulfone(PES). The beads have an average size of 3 mm and a surface dense layer of 20 microns. To help adhesion and proliferation of bacterial cells, the surfaces of the PES beads were etched, and numerous holes about 1.5 micrometers in diameter were generated as tunnels for cell colonizing in the larger internal cavities of about 5 micrometers in diameter. The quinoline degradation was remarkably enhanced by the cells immobilized in PES beads compared with that by the free cells at pH 5.0 or 10.0 and a temperature of 40 °C. The enhanced degradation of quinoline was contributed to the biofilm on the surface of PES beads, resulting in the significant reduction of retention time from 9 h to 2 h. Furthermore, the beads remain intact after the ultrasonic treatment of them for 30 min or recycling 50 times, indicating that they have excellent mechanical strength, flexibility and swelling capacity. Thus, PES beads have great potential to be matrix for the cell immobilization in bioaugmentation.

show abstract

“…Recent research in the field of biodegradation has been focused to the search of novel bacteria able to completely mineralize THF concentrations in waters with an initial THF content of 30 mM [8,9]. However, the reported studies showed several limitations from a practical point of view, among them in the performed studies THF was the sole carbon and energy source [10], and it was difficult to recover the biomass from the treated waters [11].…”

Section: Introductionmentioning

confidence: 99%

Remediation of wastewaters containing tetrahydrofuran. Study of the electrochemical mineralization on BDD electrodes

Urtiaga

Fernández-Castro

Gómez

et al. 2014

Chemical Engineering Journal

View full text Add to dashboard Cite

This work contributes to the development of electro-oxidation on commercial boron doped diamond (BDD) anodes as an efficient and versatile environmental technology to deal with remediation of tetrahydrofuran (THF) polluted industrial wastewaters.Working with an undivided flow-by electrochemical cell, a systematic experimental study has been carried out to analyze the influence of the following operation variables: i) initial THF concentrations in the range 500-1100 mg/L ii) supporting electrolyte, Na 2 SO 4 and NaCl and iii) current density in the range 300-1200 A/m 2 . The performance of the oxidation process was assessed through the change in the concentration of THF, chemical oxygen demand (COD), and total organic carbon (TOC) being the current density the variable that exerted the most positive kinetic influence; more precisely the reduction of COD after 60 minutes changed from 40 % at j app = 300 A/m 2 to 95.5 % at j app =1200 A/m 2 , whereas the reductions of TOC were typically higher than 95 % for a value of the specific charge of Q=10 A/hL. Besides, THF oxidation products have been analyzed, and the reactions' pathway are proposed.Finally, the formation of chloride by-products, such as perchlorate was assessed observing that it was hindered at low current densities. In the view of these findings, it is concluded that THF oxidation on BDD anodes should be better performed at low current densities, i.e. 300 A/m 2 for the type of wastewaters analyzed in the present work, to reach a compromise between effective degradation and the formation of undesirable chlorinated by-products.

show abstract

Biodegradation of tetrahydrofuran by Pseudomonas oleovorans DT4 immobilized in calcium alginate beads impregnated with activated carbon fiber: Mass transfer effect and continuous treatment

Cited by 43 publications

References 31 publications

Decolorization characteristics of a newly isolated salt-tolerant Bacillus sp. strain and its application for azo dye-containing wastewater in immobilized form

Decolorization characteristics of a newly isolated salt-tolerant Bacillus sp. strain and its application for azo dye-containing wastewater in immobilized form

Novel porous polyethersulfone beads as matrix to immobilize Comamonas testosteroni sp. bdq06 in quinoline biodegradation

Remediation of wastewaters containing tetrahydrofuran. Study of the electrochemical mineralization on BDD electrodes

Contact Info

Product

Resources

About