Chromium(VI) reduction in a membrane bioreactor with immobilized Pseudomonas cells

Konovalova, V. V.; Dmytrenko, G.M.; Nigmatullin, Rinat; Bryk, M. T.; Gvozdyak, P. I.

doi:10.1016/s0141-0229(03)00204-7

Cited by 78 publications

(26 citation statements)

References 8 publications

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“…Studies on chromate reduction reported by Konovalova et al (2003) also support our observation. Reduction was faster in simulated effluent compared to minimal medium containing 25 mg Cr 6+ l -1 both with free cells as well as PVA-alginate cells (Fig.…”

Section: Discussionsupporting

confidence: 91%

“…Immobilization of bacteria for Cr 6+ reduction has been reported: Tucker et al 1998;Pattanapipitpaisal et al 2001;Konovalova et al 2003;Camargo et al 2004a. Cr 6+ reduction in continuous culture by immobilized cells of Microbacterium liquefaciens MP30 (Pattanapipitpaisal et al 2001), Bacillus sp.…”

Section: Introductionmentioning

confidence: 99%

“…Cr 6+ reduction in continuous culture by immobilized cells of Microbacterium liquefaciens MP30 (Pattanapipitpaisal et al 2001), Bacillus sp. ES 29 (Camargo et al 2004a), Serratia marcescens as a stable biofilm (De Bruijn and Mondaca 2000;Mondaco et al 2002), Pseudomonas immobilized in agar-agar films on the cellulose acetate membrane (Konovalova et al 2003) are also known. Use of expensive electron donors is not feasible for practical applications in large-scale bioremediation projects; hence use of whole cells having endogenous electron donors can be advantageous.…”

Section: Introductionmentioning

confidence: 99%

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Hexavalent chromate reduction by immobilized Streptomyces griseus

Poopal

Laxman

2008

Biotechnol Lett

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Hexavalent chromium, which is a mutagen and carcinogen, was efficiently reduced by Streptomyces griseus. This activity was associated with the cell. Cr(6+) reduction by free as well as immobilized cells was studied: cells in PVA-alginate had the highest (100%) Cr(6+) removal efficiency in 24 h with reduction rates similar to free cells. Immobilized cells completely reduced 25 mg Cr(6+) l(-1) in 24 h. PVA-alginate immobilized cells could be reused four times to completely reduce 25 mg Cr(6+) l(-1) in 24 h each time. Chromate in a simulated effluent containing Cu(2+), Mg(2+), Mn(2+) and Zn(2+) was completely reduced by PVA-alginate immobilized cells within 9 h.

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Section: Discussionsupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Hexavalent chromate reduction by immobilized Streptomyces griseus

Poopal

Laxman

2008

Biotechnol Lett

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“…Moreover, membranes can be used as carriers of microorganisms. Previously, we have demonstrated chromate reduction in a membrane bioreactor with Pseudomonas cells immobilised on membrane surface [16]. Bacteria embedded into agar layer on the membrane surface provided cell protection from the excessive toxic action at high chromate concentration, allowing Cr(VI) reduction in solution containing up to 20 mg l -1 of Cr(VI).…”

Section: Introductionmentioning

confidence: 99%

Spatial sequencing of microbial reduction of chromate and nitrate in membrane bioreactor

Konovalova

Nigmatullin

Dmytrenko

et al. 2008

Bioprocess Biosyst Eng

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Sequential reduction of chromate and nitrate, two competitive electron acceptors, has been demonstrated for strains of Pseudomonas genus for both planktonic cells and cells immobilised in agar layers on the surface of synthetic membrane. Denitrification occurs practically after chromate depletion. This order of reduction process is consistent with redox potentials of the respective reactions. In a membrane bioreactor, competitive inhibition results in nitrate transfer through the membrane without transformation. Thus the receiving phase is contaminated with nitrate. To address this problem, a membrane has been used for spatial sequencing of chromate and nitrate reduction. Bacterial cells were immobilised in two layers with each layer placed on opposing sides of the membrane. By this means, chromate reduction is localised into the layer contacting the feed phase while nitrate reduction occurs in the layer facing the receiving phase. As a result, only traces of the pollutants are detected in the receiving phase.

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“…Bioreactors with immobilized microorganisms are being increasingly used for wastewater treatment achieving high performance and stability due to high cell densities, absence of cell washout, and extended biochemical or biotransformation reaction time. Various bioreactors, such as continuous stirred tank (Bhide et al 1996;Rajwade and Paknikar 1997), continuous-flow (Pattanapipitpaisal et al 2001;Humphries et al 2005), membrane (Konovalova et al 2003), fixed film (Chirwa and Wang 1997a, b), and fed-batch (Fujii et al 1990) have been used for reduction of Cr 6? .…”

Section: Introductionmentioning

confidence: 99%

Chromate reduction by PVA-alginate immobilized Streptomyces griseus in a bioreactor

Poopal

Laxman

2008

Biotechnol Lett

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Microbial reduction of toxic Cr6+ to the less toxic Cr3+ is potentially a useful bioremediation process. Among the matrices tested for whole cell immobilization of an efficient chromate-reducing Streptomyces griseus strain, PVA-alginate was the most effective and was used for reduction of Cr(VI) in a bioreactor. Cr6+ reduction efficiency decreased as Cr6+ was increased from 2 to 12 mg l(-1) but increased with an increase in biomass concentration. However, increasing the flow rate from 2 to 8 ml h(-1) did not significantly affect Cr(6+) reduction. The reduction was faster in simulated effluent than in synthetic medium and complete removal of 8 mg Cr6+ l(-1) from effluent and synthetic medium occurred in 2 and 12 h, respectively. Our results indicate that immobilized S. griseus cells could be applied for the large-scale bioremediation of chromate-containing effluents and wastewaters.

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Chromium(VI) reduction in a membrane bioreactor with immobilized Pseudomonas cells

Cited by 78 publications

References 8 publications

Hexavalent chromate reduction by immobilized Streptomyces griseus

Hexavalent chromate reduction by immobilized Streptomyces griseus

Spatial sequencing of microbial reduction of chromate and nitrate in membrane bioreactor

Chromate reduction by PVA-alginate immobilized Streptomyces griseus in a bioreactor

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