A packed-bed fungal bioreactor for the continuous decolourisation of azo-dyes (Orange II).
Identifieur interne : 000A39 ( Main/Curation ); précédent : 000A38; suivant : 000A40A packed-bed fungal bioreactor for the continuous decolourisation of azo-dyes (Orange II).
Auteurs : I. Mielgo [Espagne] ; M T Moreira ; G. Feijoo ; J M LemaSource :
- Journal of biotechnology [ 0168-1656 ] ; 2001.
Descripteurs français
- KwdFr :
- MESH :
- métabolisme : Agents colorants, Benzènesulfonates, Composés azoïques, Oxygène, Phanerochaete.
- Bioréacteurs, Cinétique, Couleur, Température.
English descriptors
- KwdEn :
- MESH :
- chemical , metabolism : Azo Compounds, Benzenesulfonates, Coloring Agents, Oxygen.
- metabolism : Phanerochaete.
- Bioreactors, Color, Kinetics, Temperature.
Abstract
The degradation of an azo dye, Orange II, by immobilised Phanerochaete chrysosporium in a continuous packed bed bioreactor for periods longer than 30 days has been carried out. Nearly complete decolourisation (>95%) was achieved when working at a high dye load rate of 0.2 g x l(-1) x d(-1), a temperature of 37 degrees C, a hydraulic retention time (HRT) of 24 h and applying oxygen gas in a pulsed flow. These conditions allowed Manganese peroxidase (MnP) production and the subsequently Orange II decolourisation. A correlation between residual MnP activity in the effluent and decolourisation was established. Apparently, for decolourisation to be effective, a minimum MnP activity was required, no substantial increase in efficiency at MnP activities higher than 10 U x 1(-1) was observed. The treatment caused, the breakdown of the chromophoric group as well as the cleavage of the aromatic ring.
DOI: 10.1016/s0168-1656(01)00319-4
PubMed: 11500202
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pubmed:11500202Le document en format XML
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<wicri:regionArea>Department of Chemical Engineering, Institute of Technology, University of Santiago de Compostela, E-15706 Santiago de Compostela, Gazila</wicri:regionArea>
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<author><name sortKey="Moreira, M T" sort="Moreira, M T" uniqKey="Moreira M" first="M T" last="Moreira">M T Moreira</name>
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<author><name sortKey="Feijoo, G" sort="Feijoo, G" uniqKey="Feijoo G" first="G" last="Feijoo">G. Feijoo</name>
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<author><name sortKey="Lema, J M" sort="Lema, J M" uniqKey="Lema J" first="J M" last="Lema">J M Lema</name>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Azo Compounds (metabolism)</term>
<term>Benzenesulfonates (metabolism)</term>
<term>Bioreactors (MeSH)</term>
<term>Color (MeSH)</term>
<term>Coloring Agents (metabolism)</term>
<term>Kinetics (MeSH)</term>
<term>Oxygen (metabolism)</term>
<term>Phanerochaete (metabolism)</term>
<term>Temperature (MeSH)</term>
</keywords>
<keywords scheme="KwdFr" xml:lang="fr"><term>Agents colorants (métabolisme)</term>
<term>Benzènesulfonates (métabolisme)</term>
<term>Bioréacteurs (MeSH)</term>
<term>Cinétique (MeSH)</term>
<term>Composés azoïques (métabolisme)</term>
<term>Couleur (MeSH)</term>
<term>Oxygène (métabolisme)</term>
<term>Phanerochaete (métabolisme)</term>
<term>Température (MeSH)</term>
</keywords>
<keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en"><term>Azo Compounds</term>
<term>Benzenesulfonates</term>
<term>Coloring Agents</term>
<term>Oxygen</term>
</keywords>
<keywords scheme="MESH" qualifier="metabolism" xml:lang="en"><term>Phanerochaete</term>
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<term>Benzènesulfonates</term>
<term>Composés azoïques</term>
<term>Oxygène</term>
<term>Phanerochaete</term>
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<term>Color</term>
<term>Kinetics</term>
<term>Temperature</term>
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<front><div type="abstract" xml:lang="en">The degradation of an azo dye, Orange II, by immobilised Phanerochaete chrysosporium in a continuous packed bed bioreactor for periods longer than 30 days has been carried out. Nearly complete decolourisation (>95%) was achieved when working at a high dye load rate of 0.2 g x l(-1) x d(-1), a temperature of 37 degrees C, a hydraulic retention time (HRT) of 24 h and applying oxygen gas in a pulsed flow. These conditions allowed Manganese peroxidase (MnP) production and the subsequently Orange II decolourisation. A correlation between residual MnP activity in the effluent and decolourisation was established. Apparently, for decolourisation to be effective, a minimum MnP activity was required, no substantial increase in efficiency at MnP activities higher than 10 U x 1(-1) was observed. The treatment caused, the breakdown of the chromophoric group as well as the cleavage of the aromatic ring.</div>
</front>
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<Month>Aug</Month>
<Day>23</Day>
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<Title>Journal of biotechnology</Title>
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<ArticleTitle>A packed-bed fungal bioreactor for the continuous decolourisation of azo-dyes (Orange II).</ArticleTitle>
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<Abstract><AbstractText>The degradation of an azo dye, Orange II, by immobilised Phanerochaete chrysosporium in a continuous packed bed bioreactor for periods longer than 30 days has been carried out. Nearly complete decolourisation (>95%) was achieved when working at a high dye load rate of 0.2 g x l(-1) x d(-1), a temperature of 37 degrees C, a hydraulic retention time (HRT) of 24 h and applying oxygen gas in a pulsed flow. These conditions allowed Manganese peroxidase (MnP) production and the subsequently Orange II decolourisation. A correlation between residual MnP activity in the effluent and decolourisation was established. Apparently, for decolourisation to be effective, a minimum MnP activity was required, no substantial increase in efficiency at MnP activities higher than 10 U x 1(-1) was observed. The treatment caused, the breakdown of the chromophoric group as well as the cleavage of the aromatic ring.</AbstractText>
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<AffiliationInfo><Affiliation>Department of Chemical Engineering, Institute of Technology, University of Santiago de Compostela, E-15706 Santiago de Compostela, Gazila, Spain.</Affiliation>
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