fulltext.study @t Gmail

Immobilized cells of Acidithiobacillus ferrooxidans in PVC strands and sulfite removal in a pilot-scale bioreactor

Paper ID Volume ID Publish Year Pages File Format Full-Text
4837 249 2006 7 PDF Available
Title
Immobilized cells of Acidithiobacillus ferrooxidans in PVC strands and sulfite removal in a pilot-scale bioreactor
Abstract

The biooxidation of ferrous ion into ferric ion by Acidithiobacillus ferrooxidans can be potentially used for the removal of H2S from industrial gases. In this work, Fe3+ ions were obtained through the oxidation of Fe2+ using the LR strain of At. ferrooxidans immobilized in PVC stands in a pilot-scale bioreactor, while H2S was removed in an absorption tower equipped with Rasching rings. At. ferrooxidans LR strain cells were immobilized by inoculating the bacterium in a Fe2+-mineral medium and percolating it through the support. After complete Fe2+ oxidation, which took around 90 h, the reactor was washed several times with sulfuric acid (pH 1.7) before a new cycle was started. Four additional cycles using fresh Fe2+ mineral medium were then run. During these colonization cycles, the time required for complete iron oxidation decreased, dropping to about 60 h in the last cycle. The batch experiments in the H2S gas removal trials resulted in a gas removal rate of about 98–99% under the operational conditions employed. In the continuous experiments with the bioreactor coupled to the gas absorption column, a gas removal efficiency of almost 100% was reached after 500 min. Precipitate containing mainly sulfur formed during the experimental trial was identified by EDX.

Keywords
Biological oxidation; Bioreactors; Acidithiobacillus ferrooxidans; Ferrous sulfate; Immobilization; Hydrogen sulfide
First Page Preview
Immobilized cells of Acidithiobacillus ferrooxidans in PVC strands and sulfite removal in a pilot-scale bioreactor
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
Publisher
Database: Elsevier - ScienceDirect
Journal: Biochemical Engineering Journal - Volume 28, Issue 2, 15 February 2006, Pages 201–207
Authors
, , ,
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