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AEROBIC AND ANAEROBIC TREATMENT OF C.I. DISPERSE BLUE 79 - VOLUME II, APPENDICES
Citation:
Gardner, D. A., T J. Holdsworth*, G M. Shaul*, K. A. Dostal*, AND L D. Betowski*. AEROBIC AND ANAEROBIC TREATMENT OF C.I. DISPERSE BLUE 79 - VOLUME II, APPENDICES. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/2-89/051b (NTIS PB90-111659), 1989.
Impact/Purpose:
information
Description:
This study was conducted to determine the fate of C.I. Disperse Blue 79, one of the largest production volume dyes, and select biodegradation products in a conventionally operated activated sludge process and an anaerobic sludge digestion system. To achieve this objective, a pilot study was conducted from November 1987 to February 1989. The equipment operated included two continuous feed pilot-scale wastewater treatment systems, consisting of one control system and one experimental system. Screened, raw municipal wastewater fed to the experimental treatment system was dosed with a target concentration of 5 mg/L of active ingredient in the commercial formulation of C.I. Disperse Blue 79. The control system was fed only the screened, raw municipal wastewater. After acclimation and steady state conditions were reached, samples from each system were analyzed for the dye and related compounds. A bench-scale activated sludge system was also operated to assess the fate of dye degradation products from the anaerobic digester in an aerobic treatment system. This system was operated to simulate the recycle of digester supernatant to the head-end of a typical wastewater treatment system. Volume I of the report presents the results of this extensive researchproject. Findings are presented regarding: (1) the affect of the addition of C.I. Disperse Blue 79 on the operation of an activated sludge system and an anaerobic digester; (2) the fate of the dye in the tratment systems; and (3) the detection of any degradation products in the systems. Volume II contains the raw data.