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H2S removal with an immobilized cell hybrid reactor

Paper ID Volume ID Publish Year Pages File Format Full-Text
36703 45142 2005 7 PDF Available
Title
H2S removal with an immobilized cell hybrid reactor
Abstract

When hydrogen sulphide gas was introduced into a single reactor, in which the cells were mixed with iron solution in the absence of the immobilization particles, the cells were damaged by the high concentration of H2S and the H2S removal rate was rapidly decreased. Therefore, a hybrid reactor was developed, by combining a chemical reduction reactor and a biological oxidation reactor, to remove the toxic effect of H2S on the cells and to improve the H2S removal rate. The microbial cells were immobilized on the surface of curdlan particles, in order to enhance the Fe(II) oxidation rate through repeated fed-batch operation. As a result, the iron oxidation rate was four times faster than that obtained with the free cells. Iron solution, oxidized in an oxidation reactor by Thiobacillus ferrooxidans, was fed into the iron reduction reactor, and the reduced iron solution was recycled into the iron oxidation reactor. The X-ray diffractometer (XRD) data indicated that iron was precipitated along with elemental sulphur at the high concentration of H2S, resulting in the iron oxidation rate being decreased with increasing reaction time.

Keywords
Hybrid reactor; Iron oxidation; H2S removal; Immobilized cell
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 40, Issue 6, May 2005, Pages 2197–2203
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
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Full-text PDF Download
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