Complete biological reductive transformation of tetrachloroethene to ethane
Article Abstract:
Ground anaerobic granular sludge was mixed with Rhine river sediment in a proportion of 1:3 and packed in a fixed bed column to test its ability to reduce tetrachloroethene (PCE). The results showed that in the presence of 1 millimolar lactate, 9 micromoles of PCE was dechlorinated to ethene, which was further reduced to ethane. The conversion was nearly total, at 95% to 98%, withno chlorinated compounds remaining. The reductive dechlorination occured at both 20 and 10 degrees celsius. These results indicate that reductive dechlorination may be used during bioremediation to remove PCE.
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 1992
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Measurement of minimum substrate concentration (Smin) in a recycling fermentor and its prediction from the kinetic parameters of Pseudomonas sp. strain B13 from batch and chemostat cultures
Article Abstract:
The growth kinetics of Pseudomonas sp. B13 on 3-chlorobenzoate (3CB) and acetate was investigated under conditions of minimum substrate concentration (Smin) in a recycling fermentor. Smin was different for batch, chemostat and recycling-fermentor cultures. There was a wide variation in the kinetic parameters for the three experimental conditions. Maintenance energy requirements for cells grown in acetate, 3CB or a mixture of both substrates were dependent on the kinetics of substrate transformation.
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 1996
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Transformation of low concentrations of 3-chlorobenzoate by Pseudomonas sp. strain B13: kinetics and residual concentrations
Article Abstract:
Pseudomonas sp. strain B13 has two different transformation systems for 3-chlorobenzoate (3CB). One operates at concentrations over 1 micro mole and has a threshold concentration of 0.50 + - 0.11 micro moles. The other operates at concentrations below 1 micro mole of 3CB and has no threshold concentrations. Transformation kinetics are unaffected by the presence or uptake of acetate and there is no observable induction of residual substrate concentration.
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 1996
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