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Iranian Journal of Biotechnology، جلد ۶، شماره ۳، صفحات ۱۳۷-۱۴۳
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عنوان انگلیسی Immobilization of Acidithiobacillus Ferrooxidans on Monolithic Packing for Biooxidation of Ferrous Iron
چکیده انگلیسی مقاله The oxidation of ferrous iron (Fe2+) in solution using Acidithiobacillus ferrooxidans has industrial applications exclusively in the regeneration of ferric iron (Fe3+) as an oxidizing agent for the removal of hydrogen sulfide from waste gases, desulfurization of coal, leaching of non-ferrous metallic sulfides and treatment of acid mine drainage. The aim of this investigation was to increase the bio-oxidation rate of ferrous sulfate by using immobilized cells. Rate of Fe2+ oxidation was determined in a packed-bed bioreactor configuration with monolithic particles being used as support material. Biooxidation of ferrous iron by immobilized cells was investigated in repeated batch culture and continuous operation using a laboratory scale packed-bed bioreactor. On this account, effects of process variables such as dilution rate and initial concentrations of Fe2+ on oxidation of ferrous sulfate were consequently investigated. During repeated batch culture, the immobilized-cells were stable and showed high constant iron-oxidizing activities. A maximum Fe2+ oxidation rate of 6.7 g/l/h was achieved at the dilution rate of 2 h-1, while no obvious precipitate was detected in the bioreactor.
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نویسندگان مقاله احسان کهریزی |
department of chemical and petroleum engineering, sharif university of technology, p.o. box 11155-9465, tehran, i.r. iran
سازمان اصلی تایید شده: دانشگاه صنعتی شریف (Sharif university of technology)

ایران عالم زاده |
department of chemical and petroleum engineering, sharif university of technology, p.o. box 11155-9465, tehran, i.r. iran
سازمان اصلی تایید شده: دانشگاه صنعتی شریف (Sharif university of technology)

منوچهر وثوقی |
department of chemical and petroleum engineering, sharif university of technology, p.o. box 11155-9465, tehran, i.r. iran
سازمان اصلی تایید شده: دانشگاه صنعتی شریف (Sharif university of technology)

نشانی اینترنتی http://www.ijbiotech.com/article_7047_a261b66e913a810aae6dae1303dfca21.pdf
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