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Fate of selected RCRA compounds in a pilot‐scale activated sludge system
Author(s) -
Bhattacharya S. K.,
Madura R. L.,
Dobbs R. A.,
Angara R. V. R.,
Tabak H.
Publication year - 1996
Publication title -
water environment research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.356
H-Index - 73
eISSN - 1554-7531
pISSN - 1061-4303
DOI - 10.2175/106143096x127695
Subject(s) - tetrachloroethylene , trichloroethylene , chemistry , activated sludge , ethylbenzene , environmental chemistry , sorption , volatilisation , activated carbon , dibutyl phthalate , waste management , industrial wastewater treatment , chlorobenzene , wastewater , benzene , organic chemistry , adsorption , engineering , catalysis
This research determined the removal and fate of 11 selected RCRA compounds in a pilot‐scale activated sludge system with a 4‐day SRT and 7.5‐hour HRT. Screened and degritted raw wastewater from a Cincinnati, OH, wastewater treatment plant was used for this study at the U.S. EPA's Test and Evaluation (T&E) Facility. A continuous feed of spike toxic cocktail of 0.25 mg/L each of acetone, methyl ethyl ketone, cyclohexanone, tetrahydrofuran, carbon tetrachloride, 1,1,1‐trichloroethane, 1,1,2‐trichloroethane, trichloroethylene, tetrachloroethylene, chlorobenzene, and ethylbenzene was used to produce an acclimated biomass. The test was run for 7 weeks. Volatilization losses in primary sedimentation exceeded 10% for carbon tetrachloride, 1,1,1‐trichloroethane, 1,1,2‐trichloroethane, and tetrachloroethylene. Sorption of the 11 compounds to primary and secondary sludge ranged from 0.6 to 5.1%. Nine of the 11 test compounds were removed >94% with estimated biodegradation ranging from 0 to 93.4%.