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Batch kinetics of ferrous iron oxidation by Leptospirillum ferriphilum at moderate to high total iron concentration

Paper ID Volume ID Publish Year Pages File Format Full-Text
3966 201 2010 9 PDF Available
Title
Batch kinetics of ferrous iron oxidation by Leptospirillum ferriphilum at moderate to high total iron concentration
Abstract

A study of the kinetics of ferrous iron oxidation by a free suspended culture of the bacterium Leptospirillum ferriphilum in batch regime at moderate to high iron concentrations was conducted. A circulating bed airlift bioreactor was used in order to obtain reliable biokinetic data, unaffected by biofilm growth. The two major factors in consideration were the effects of the pH and the total iron concentration in the range of 5–40 g/L. The optimal pH was found between 1.05 and 1.80. In this range a strictly growth associated biooxidation with constant yield coefficient was proven, while at suboptimal pH values non-growth associated iron biooxidation was shown at pH as low as 0.4. This effect was taken into consideration for the derivation of a Monod-type kinetic model, derived on first principles from the electrochemical-enzymatic model for ferrous iron biooxidation. Our model shows a linear dependence between the apparent half-saturation constant (Kapp) and the total iron concentration in studied range of iron concentration.

Keywords
Leptospirillum ferriphilum; Extremophiles; Iron biooxidation; Kinetic modeling; Airlift bioreactor
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Batch kinetics of ferrous iron oxidation by Leptospirillum ferriphilum at moderate to high total iron concentration
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biochemical Engineering Journal - Volume 50, Issues 1–2, 15 June 2010, Pages 54–62
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us