Removal of chlorophenolics and toxicity during high-rate anaerobic treatment of segregated kraft mill bleach plant effluents

The behavior of selected chlorinated phenols, guaiacols, catechols, and vanillins during the high-rate anaerobic treatment of segregated kraft mill bleach plant effluents was investigated. Eleven of the 12 detected chlorinated catechols, guaiacols, and vanillins were removed at efficiencies of great...

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Bibliographic Details
Published in:Environmental science & technology 1993-09, Vol.27 (9), p.1783-1789
Main Authors: Parker, Wayne J, Farquhar, Grahame J, Hall, Eric R
Format: Article
Language:English
Subjects:
ANAEROBIOSE
ANAEROBIOSIS
BLANCHISSEMENT
BLANQUEADURA
BLEACHING
CHLORE
CHLORINE
chlorophenolics and toxicity elimination
CLORO
COMPOSE PHENOLIQUE
COMPUESTOS FENOLICOS
DECHET
DESECHOS
Effluents
FERMENTACION
FERMENTATION
Hazardous materials
KRAFT MILL EFFLUENT
PHENOLIC COMPOUNDS
TOXICIDAD
TOXICITE
TOXICITY
WASTES
Water treatment
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Summary:The behavior of selected chlorinated phenols, guaiacols, catechols, and vanillins during the high-rate anaerobic treatment of segregated kraft mill bleach plant effluents was investigated. Eleven of the 12 detected chlorinated catechols, guaiacols, and vanillins were removed at efficiencies of greater than 80% from an 80% v/v dilution of the wastewater, at a hydraulic retention time of 6 h when the influent was cosubstrate supplemented. The behavior of chlorinated phenols was influenced by the chlorine position and degree of chlorination. Supplementation of the reactor influent with a synthetic evaporator condensate containing methanol and ethanol improved the removal of a number of the compounds by greater than 80%. Removal efficiencies were insensitive to wastewater dilution over a range of 40-80% v/v and to hydraulic retention time over a range of 6-48 h. High-rate anaerobic treatment was observed to reduce the toxicity resulting from chlorophenolics, as determined by toxicity equivalence factors, by 93% when cosubstrate supplementation was employed and by 65% in the absence of cosubstrate.
ISSN:0013-936X
1520-5851
DOI:10.1021/es00046a004