A laboratory scale activated sludge treatment system was developed for the treatment of phenoxy herbicide chemicals and the associated chlorophenols in a toxic landfill leachate. A novel sludge recycle system was employed to ensure high specific activity of the return sludge. The activated sludge treatment resulted in 99.5% removal of phenoxies and chlorophenols and 84% TOC reduction for 10% influent leachate concentrations. The corresponding toxicity reduction was 76%. An increase in influent concentration resulted in a decline in activated sludge performance.
Activated Sludge Treatment of Phenoxy Herbicides and Chlorophenols
P. J. McAllister, S. M. Rao Bhamidimarri, R. Chong, G. J. Manderson; Activated Sludge Treatment of Phenoxy Herbicides and Chlorophenols. Water Sci Technol 1 October 1993; 28 (7): 111–115. doi: https://doi.org/10.2166/wst.1993.0150
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