Design variables in high efficiency reactors for the biooxidation of ferrous iron in solution

Mazuelos, Alfonso; Palencia, I.; Romero, R.; Rodríguez, Gustavo; Carranza, Francisco

doi:10.1016/s1572-4409(99)80051-0

Cited by 5 publications

(4 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Most of the reactors employed previously were of the packed or fluidised bed types in which bio-systems (microorganisms or active solid cultures) were immobilised, especially with physical or physico-chemical bonds, on to the surface of some insoluble porous material such as sand, plastic or ceramic, 11 carbon, 15,13,18 ion exchange resin, 18 nickel, 19 siliceous stone, 15,20 polyethylene, extruded polystyrene, and expanded polystyrene. 15 The great majority of these packings are manufactured ones and it has been suggested that their use on a commercial scale is expensive.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Process intensification in wastewater treatment: ferrous iron removal by a sustainable membrane bioreactor system

Pekdemir

Keskinler

Yildiz

et al. 2003

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

Increasing the flowrate of the inlet wastewater caused a reduction in conversion rate. The oxidation rate reduced along the reactor height as the wastewater moved towards the exit at the top but conversion showed the opposite trend. Increasing Fe 2+ concentration up to a critical point resulted in an increased oxidation rate but beyond the critical point caused the oxidation rate to decrease. Luffa cylindrica displayed suitable characteristics for use as a support matrix for formation of a Thiobacillus ferrooxidans biofilm and showed promising potential as an ecological and sustainable alternative to existing synthetic support materials. Membrane separation was shown to be a very effective means of Fe 3+ removal from the wastewater with removal changing from 92% at pH 2.3 to complete removal at pH 5.0.

show abstract

Section: Introductionmentioning

confidence: 99%

“…15 The great majority of these packings are manufactured ones and it has been suggested that their use on a commercial scale is expensive. 9 The present work used a natural (vegetable) sponge, namely Luffa cylindrica, as packing material.…”

Section: Introductionmentioning

confidence: 99%

Process intensification in wastewater treatment: ferrous iron removal by a sustainable membrane bioreactor system

Pekdemir

Keskinler

Yildiz

et al. 2003

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

show abstract

“…The natural tendency of A. ferrooxidans to grow on surfaces not only on inert support but also on minerals makes it an adequate microorganism for cell immobilization and useful to increase iron(III) productivity (Karamanev and Nikolov, 1988;Ramírez et al, 1997;Harneit et al, 2006). Several supports have been employed, including the use of glass beads, activated carbon particles, sand, polystyrene, polyurethane, poly (vinyl alcohol), calcium alginate, ion-exchange resin, nickel alloy fibre, PVC and diatomaceous earth (Grishin and Tuovinen, 1988;Armentia and Webb, 1992;Porro et al, 1993;Wakao et al, 1994;Mazuelos et al, 1999;Gomez et al, 2000;Curutchet et al, 2001;Mesa et al, 2002Mesa et al, , 2004Long et al, 2003Long et al, , 2004aPark et al, 2005;Giro et al, 2006;Yujian et al, 2006;Mousavi et al, 2007;Yujian et al, 2007). In many of those cases, A. ferrooxidans cells immobilized could grow at higher dilution rates reaching high iron(III) productivity.…”

Section: Introductionmentioning

confidence: 99%

Biological ferrous sulfate oxidation by A. ferrooxidans immobilized on chitosan beads

Giaveno

Lavalle

Guibal

et al. 2008

Journal of Microbiological Methods

View full text Add to dashboard Cite

The immobilization of Acidithiobacillus ferrooxidans cells on chitosan and cross-linked chitosan beads and the biooxidation of ferrous iron to ferric iron in a packed-bed bioreactor were studied. The biofilm formation was carried out by using a glass column reactor loaded with chitosan or cross-linked chitosan beads and 9 K medium previously inoculated with A. ferrooxidans cells. The immobilization cycles on the carrier matrix with the bioreactor operating in batch mode were compared. Then, the reactor was operated using a continuous flow of 9 K medium at different dilution rates. The results indicate that the packed-bed reactor allowed increasing the flow rate of medium approximately two fold (chitosan) and eight fold (chitosan cross-linked) without cells washout, compared to a free cell suspension reactor used as control, and to reach ferric iron productivities as high as 1100 and 1500 mg l(-1) h(-1) respectively. Scanning electron microscopy micrographs of the beads, infrared spectroscopy and the X-ray diffraction patterns of precipitates on the chitosan beads were also investigated.

show abstract

“…Reactors with attached A. ferrooxidans that continually produce iron(III) have been employed to enhance metal recovery from ores as well as in other applications [18][19][20][21][22][23][24]. In most cases, the conditions under which the immobilization process was performed led to abundant levels of jarosite [basic iron(III) sulfate] precipitation.…”

Section: Introductionmentioning

confidence: 99%

Ferrous Iron Oxidation by Immobilized on Refractory Clay Tiles

Donati¹

2008

TOBIOTJ

View full text Add to dashboard Cite

Refractory clay tiles are composed of kaolin, which is the commercial name of clay, and this consists mainly of kaolinite mineral. Two such tiles and caowool packed in glass columns were used for the immobilization of Acidithiobacillus ferrooxidans cells in a ferrous iron medium, which was percolated through the supports. Colonization was carried out by several media replacements with no further inoculation until maximum ferric iron productivity was reached. One of the tiles was discarded due to the high iron precipitation during bacterial growth. The columns with the other supports were used for ferrous iron oxidation in batch and continuous flow modes of operation and these appeared to be promising supports for A. ferrooxidans. A ferrous iron oxidation rate of 14.5 mmol.l -1 .h -1 was reached in one of the columns in the continuous culture. After being used for several cultures, pieces of tiles with immobilized cells were stored at 4 ºC. Samples at different times were incubated in ferrous medium and these showed high cell activity even after 6 months.

show abstract

Design variables in high efficiency reactors for the biooxidation of ferrous iron in solution

Cited by 5 publications

References 5 publications

Process intensification in wastewater treatment: ferrous iron removal by a sustainable membrane bioreactor system

Process intensification in wastewater treatment: ferrous iron removal by a sustainable membrane bioreactor system

Biological ferrous sulfate oxidation by A. ferrooxidans immobilized on chitosan beads

Ferrous Iron Oxidation by Immobilized on Refractory Clay Tiles

Contact Info

Product

Resources

About