Enhanced decolourisation of Acid Orange 7 in a continuous UASB reactor with quinones as redox mediators.

F.J. Cervantes; F.P. van der Zee; G. Lettinga; J.A. Field

doi:10.2166/wst.2001.0198

Enhanced decolourisation of Acid Orange 7 in a continuous UASB reactor with quinones as redox mediators.

F.J. Cervantes, F.P. van der Zee, G. Lettinga, J.A. Field

Research output: Contribution to journal › Article › Academic › peer-review

74 Citations (Scopus)

Abstract

The reductive biotransformation of acid orange 7 (AO7) was explored in a lab-scale upflow anaerobic sludge blanket (UASB) reactor at low hydraulic residence times (HRT). A colour removal of 85% was achieved when the reactor was operated at a HRT of 6 hours, but decreased up to 70% when the HRT was lowered to 2 hours. Addition of the quinone model compound, anthraquinone 2,6-disulfonate (AQDS), as redox mediator, allowed for a considerably higher decolourising efficiency (>90% at all the HRT evaluated). The results indicate that the use of catalytic concentrations of AQDS (AQDS/AO7 molar ratio about 0.01) can accelerate decolourising processes achieving satisfying extent of decolourisation.

Original language	English
Pages (from-to)	123-128
Journal	Water Science and Technology
Volume	44
Issue number	4
DOIs	https://doi.org/10.2166/wst.2001.0198
Publication status	Published - 2001

Keywords

Acid orange 7
AQDS
Quinones
Redox mediators

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10.2166/wst.2001.0198

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title = "Enhanced decolourisation of Acid Orange 7 in a continuous UASB reactor with quinones as redox mediators.",

abstract = "The reductive biotransformation of acid orange 7 (AO7) was explored in a lab-scale upflow anaerobic sludge blanket (UASB) reactor at low hydraulic residence times (HRT). A colour removal of 85% was achieved when the reactor was operated at a HRT of 6 hours, but decreased up to 70% when the HRT was lowered to 2 hours. Addition of the quinone model compound, anthraquinone 2,6-disulfonate (AQDS), as redox mediator, allowed for a considerably higher decolourising efficiency (>90% at all the HRT evaluated). The results indicate that the use of catalytic concentrations of AQDS (AQDS/AO7 molar ratio about 0.01) can accelerate decolourising processes achieving satisfying extent of decolourisation.",

keywords = "Acid orange 7, AQDS, Quinones, Redox mediators",

author = "F.J. Cervantes and {van der Zee}, F.P. and G. Lettinga and J.A. Field",

year = "2001",

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language = "English",

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pages = "123--128",

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T1 - Enhanced decolourisation of Acid Orange 7 in a continuous UASB reactor with quinones as redox mediators.

AU - Cervantes, F.J.

AU - van der Zee, F.P.

AU - Lettinga, G.

AU - Field, J.A.

PY - 2001

Y1 - 2001

N2 - The reductive biotransformation of acid orange 7 (AO7) was explored in a lab-scale upflow anaerobic sludge blanket (UASB) reactor at low hydraulic residence times (HRT). A colour removal of 85% was achieved when the reactor was operated at a HRT of 6 hours, but decreased up to 70% when the HRT was lowered to 2 hours. Addition of the quinone model compound, anthraquinone 2,6-disulfonate (AQDS), as redox mediator, allowed for a considerably higher decolourising efficiency (>90% at all the HRT evaluated). The results indicate that the use of catalytic concentrations of AQDS (AQDS/AO7 molar ratio about 0.01) can accelerate decolourising processes achieving satisfying extent of decolourisation.

AB - The reductive biotransformation of acid orange 7 (AO7) was explored in a lab-scale upflow anaerobic sludge blanket (UASB) reactor at low hydraulic residence times (HRT). A colour removal of 85% was achieved when the reactor was operated at a HRT of 6 hours, but decreased up to 70% when the HRT was lowered to 2 hours. Addition of the quinone model compound, anthraquinone 2,6-disulfonate (AQDS), as redox mediator, allowed for a considerably higher decolourising efficiency (>90% at all the HRT evaluated). The results indicate that the use of catalytic concentrations of AQDS (AQDS/AO7 molar ratio about 0.01) can accelerate decolourising processes achieving satisfying extent of decolourisation.

KW - Acid orange 7

KW - AQDS

KW - Quinones

KW - Redox mediators

U2 - 10.2166/wst.2001.0198

DO - 10.2166/wst.2001.0198

M3 - Article

VL - 44

SP - 123

EP - 128

JO - Water Science and Technology

JF - Water Science and Technology

SN - 0273-1223

IS - 4

ER -

Enhanced decolourisation of Acid Orange 7 in a continuous UASB reactor with quinones as redox mediators.

Abstract

Keywords

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