Biological sulphate reduction using gas-lift reactors fed with hydrogen and carbon dioxide as energy and carbon source

Feasibility and engineering aspects of biological sulphate reduction in gas‐lift reactors were studied. Hydrogen and carbon dioxide were used as energy and carbon source. Attention was paid to biofilm formation, sulphide toxicity, sulphate conversion rate optimization, and gasliquid mass transfer li...

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Bibliographic Details
Published in:Biotechnology and bioengineering 1994-08, Vol.44 (5), p.586-594
Main Authors: van Houten, Renze T., Pol, Look W. Hulshoff, Lettinga, Gatze
Format: Article
Language:English
Subjects:
540220 - Environment, Terrestrial- Chemicals Monitoring & Transport- (1990-)
560300 - Chemicals Metabolism & Toxicology
BACTERIA
BIODEGRADATION
biofilm
Biological and medical sciences
BIOREACTORS
Biotechnology
CHALCOGENIDES
CHEMICAL REACTIONS
DECOMPOSITION
ENVIRONMENTAL SCIENCES
Fundamental and applied biological sciences. Psychology
gas-lift reactor
granulation
GROWTH
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
hydrogen sulphide toxicity
mass transfer
Methods. Procedures. Technologies
MICROORGANISMS
OXYGEN COMPOUNDS
RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT
REMEDIAL ACTION
SOLID WASTES
SULFATE-REDUCING BACTERIA
SULFATES
SULFIDES
SULFUR COMPOUNDS
sulphate-reducing bacteria
TECHNOLOGY ASSESSMENT
TOXICITY
Various methods and equipments
WASTES
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Summary:Feasibility and engineering aspects of biological sulphate reduction in gas‐lift reactors were studied. Hydrogen and carbon dioxide were used as energy and carbon source. Attention was paid to biofilm formation, sulphide toxicity, sulphate conversion rate optimization, and gasliquid mass transfer limitations. Sulphate‐reducing bacteria formed stable biofilms on pumice particles. Biofilm formation was not observed when basalt particles were used. However, use of basalt particles led to the formation of granules of sulphate‐reducing biomass. The sulphate‐reducing bacteria, grown on pumice, easily adapted to free H2S concentrations up to 450 mg/L. Biofilm growth rate then equilibrated biomass loss rate. These high free H2S concentrations caused reversible inhibition rather than acute toxicity. When free H2S concentrations were kept below 450 mg/L, a maximum sulphate conversion rate of 30 g SO42−/L · d could be achieved after only 10 days of operation. Gas‐to‐liquid hydrogen mass transfer capacity of the reactor determined the maximum sulphate conversion rate. © 1994 John Wiley & Sons, Inc.
ISSN:0006-3592
1097-0290
DOI:10.1002/bit.260440505