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Biological waste-water treatment of azo dyes

Technical Report ·
OSTI ID:6957664
; ;
The U.S. Environmental Protection Agency's (EPA) Office of Toxic Substances evaluates existing chemicals under Section 4 of the Toxic Substances Control Act (TSCA) and Premanufacture Notification (PMN) submissions under Section 5 of TSCA. Azo dyes constitute a significant portion of these PMN submissions and specific azo dyes have recently been added to the priority list for considerations in the development of test rules under Section 4. Azo dyes are of concern because some of the dyes, dye precurors, and/or their degradation products such as aromatic amines (which are also dye precurors) have been shown to be, or are suspected to be, carcinogenic. The fate of azo dyes in biological waste-water treatment systems was studied to aid in the review of PMN submissions and to assist in the possible development of test rules. Results from extensive pilot-scale activated-sludge process testing for 18 azo dyes are presented. Results from fate studies of C.I. Disperse Blue 79 in aerobic and anaerobic waste-water treatment will also be presented.
Research Organization:
Environmental Protection Agency, Cincinnati, OH (USA). Water Engineering Research Lab.
OSTI ID:
6957664
Report Number(s):
PB-88-213079/XAB; EPA-600/D-88/084
Country of Publication:
United States
Language:
English

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Related Subjects

520200* -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ACTIVATED SLUDGE PROCESS
AZO COMPOUNDS
AZO DYES
BIODEGRADATION
CARCINOGENS
CHEMICAL REACTIONS
CONTROL
DECOMPOSITION
DYES
HYDROGEN COMPOUNDS
LAWS
LIQUID WASTES
MANAGEMENT
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
POLLUTION CONTROL
PROCESSING
TOXIC SUBSTANCES CONTROL ACT
WASTE MANAGEMENT
WASTE PROCESSING
WASTE WATER
WASTES
WATER
WATER POLLUTION CONTROL
WATER TREATMENT PLANTS