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 › peer-review

75 Scopus citations

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 (US)
Pages (from-to)	123-128
Number of pages	6
Journal	Water Science and Technology
Volume	44
Issue number	4
DOIs	https://doi.org/10.2166/wst.2001.0198
State	Published - 2001
Externally published	Yes

Keywords

AQDS
Acid orange 7
Quinones
Redox mediators

ASJC Scopus subject areas

Environmental Engineering
Water Science and Technology

Access to Document

10.2166/wst.2001.0198

Cite this

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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.",

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doi = "10.2166/wst.2001.0198",

language = "English (US)",

volume = "44",

pages = "123--128",

journal = "Water Science and Technology",

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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 - AQDS

KW - Acid orange 7

KW - Quinones

KW - Redox mediators

UR - https://www.scopus.com/pages/publications/0034840384

UR - https://www.scopus.com/pages/publications/0034840384#tab=citedBy

U2 - 10.2166/wst.2001.0198

DO - 10.2166/wst.2001.0198

M3 - Article

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AN - SCOPUS:0034840384

SN - 0273-1223

VL - 44

SP - 123

EP - 128

JO - Water Science and Technology

JF - Water Science and Technology

IS - 4

ER -

Enhanced decolourisation of acid orange 7 in a continuous UASB reactor with quinones as redox mediators

Abstract

Keywords

ASJC Scopus subject areas

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