EMCB-ENVIS Node ENVIRONMENTAL BIOTECHNOLOGY

EMCB-ENVIS Centre
(0.19 g nonylphenol kg-1 soil). Nonylphenol was always completely removed from the leachates
of the two soils. It was removed by 99% from the artificial soil but only 62% from real
contaminated soil after 18 and 20 d of treatment, respectively, showing limitation due to
nonylphenol adsorption.
Ana Soares, Benoit Guieysse, Osvaldo Delgado, Bo Mattiasson. (Biotechnology Department,
Lund University, P.O. Box 124, S-221 00 Lund, Sweden). Aerobic biodegradation of
nonylphenol by cold-adapted bacteria. Biotechnology Letters, 25(9) (2003), 731-738.
Three strains capable of mineralizing nonylphenol as sole carbon source were isolated from a
sample of contaminated soil and characterized as two Pseudomonas spp. and a
Stenotrophomonas sp. The two Pseudomonas spp. expressed characteristics typical of
psychrophiles growing optimally of 10 °C and capable of growing at 0 °C. The
Stenotrophomonas sp. was more likely psychrotrophic because it had an optimal temperature
between 14 and 22 °C although it was not capable of growing at 4 °C. At 14 °C, one of the
Pseudomonas spp. exhibited the highest rate of degradation of nonylphenol (4.4 mg l -1 d -1 ), when
compared with axenic or mixed cultures of the isolates. This study represents, to the best of our
knowledge, the first reported case of cold-adapted microorganisms capable of mineralizing
nonylphenol.
Ana Soares, Benoit Guieysse, Osvaldo Delgado, Bo Mattiasson. (Biotechnology Department,
Lund University, P.O. Box 124, S-221 00 Lund, Sweden). Aerobic biodegradation of
nonylphenol by cold-adapted bacteria. Biotechnology Letters, 25(9) (2003), 731-738.
Three strains capable of mineralizing nonylphenol as sole carbon source were isolated from a
sample of contaminated soil and characterized as two Pseudomonas spp. and a
Stenotrophomonas sp. The two Pseudomonas spp. expressed characteristics typical of
psychrophiles growing optimally of 10 °C and capable of growing at 0 °C. The
Stenotrophomonas sp. was more likely psychrotrophic because it had an optimal temperature
between 14 and 22 °C although it was not capable of growing at 4 °C. At 14 °C, one of the
Pseudomonas spp. exhibited the highest rate of degradation of nonylphenol (4.4 mg l-1 d-1),
when compared with axenic or mixed cultures of the isolates. This study represents, to the best
of our knowledge, the first reported case of cold-adapted microorganisms capable of
mineralizing nonylphenol.
Andrew J. Daugulis, Colleen M. McCracken. (Department of Chemical Engineering, Queen's
University, Kingston, Ontario, Canada K7L 3N6). Microbial degradation of high and low
molecular weight polyaromatic hydrocarbons in a two-phase partitioning
bioreactor by two strains of Sphingomonas sp. Biotechnology Letters, 25(17) (2003),
1441-1444.
A mixture of six polyaromatic hydrocarbons (naphthalene, phenanthrene, fluoranthene, pyrene,
chyrysene and benzo[a]pyrene), varying in size from 2 to 5 rings, was dissolved in dodecane,
and used as the delivery phase of a partitioning bioreactor. Two species of Sphingomonas were
then used individually, and as a consortium, to determine which of the PAHs were degraded.
Only low molecular weight PAHs (naphthalene, phenanthrene and fluoranthene) were degraded
by the individual strains, but the consortium degraded all substrates either to completion or near
completion.
B Chardin, A Dolla, F Chaspoul, M Fardeau, P Gallice, M Bruschi. (Laboratoire de
Bioénergétique et Ingénierie des Protéines, Institut de Biologie Structurale et Microbiologie
- CNRS, 31 ch. Joseph Aiguier, 13009 Marseille, France. Laboratoire de Chimie Générale et
Prevention des Risques et Nuisances Technologiques, Faculté de Pharmacie, 27 bd. Jean
Moulin, 13385 Marseille cedex 05, France. Laboratoire de Microbiologie IRD, Université de
Provence, CESB-ESIL, Case 925, 163 Avenue de Luminy, 13288 Marseille Cedex 9, France).
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