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Batch culture of Acidithiobacillus caldus on tetrathionate

Paper ID Volume ID Publish Year Pages File Format Full-Text
3793 189 2011 7 PDF Available
Title
Batch culture of Acidithiobacillus caldus on tetrathionate
Abstract

Acidithiobacillus caldus (DSM 8584) grew aerobically in minimal medium at 45 °C with potassium tetrathionate as the sole energy source. Oxidation of tetrathionate during batch culture involved the production of sulfite, thiosulfate, penta- and hexathionate which were then consumed after the tetrathionate was exhausted. Average growth yields over the batch were 3.5 g(dry wt.) mol(S4O6)−1, somewhat less than yields reported for continuous growth on the same substrate. Thiosulfate was unstable under sterile culture conditions and reacted spontaneously to give tetra-, penta- and hexathionate. It is suggested that the occurrence of polythionates during growth of A. caldus on tetrathionate is due to formation of thiosulfate as the first step in tetrathionate oxidation. Observed growth yields were compared with a thermodynamic framework which suggested a growth efficiency of ca. 10%. The pattern of growth yield and thermodynamic analysis suggest the formation of elemental sulfur although this was not observed.

► Growth of At. caldus on a defined tetrathionate medium is reported. ► Growth is accompanied by the formation and consumption of polythionates ► No trithionate was detected amongst the polythionates ► An analysis of the efficiency of conversion of substrate into biomass is attempted.

Keywords
Acidithiobacillus caldus; Tetrathionate oxidation; Cell yields; Polythionates
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Batch culture of Acidithiobacillus caldus on tetrathionate
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biochemical Engineering Journal - Volume 54, Issue 3, 15 May 2011, Pages 185–191
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