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Reducing effect of aerobic selector on the toxicity of synthetic organic compounds in activated sludge process

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Eleren, Sevil Çalışkan
Alkan, Ufuk

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Elsevier

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The effects of phenol, 2-chlorophenol (2-CP), 2,4-dichlorophenol (2,4-DCP) and 1,2,4-trichlorobenzene (1,2,4-TCB) on the biodegradation kinetics of the conventional activated sludge system (CASS) and the selector activated sludge system (SASS) were investigated. Experiments were carried out using a respirometric method on unacclimated biomass from two lab-scale systems that were operated with the sludge age of 8 days. Toxicity of the test compounds for both reactors were arranged according to EC50 (effective concentration) values in order as: 1,2,4-TCB > 2,4-DCP > 2-CP > phenol. All selected test compounds induced higher inhibition effect in the CASS. The SASS appeared to reduce inhibition effect in comparison to the CASS, by 21.36%, 66.95%, 64.37% and 33.33% for phenol, 2-CP, 2,4-DCP and 1,2,4-TCB, respectively. Consequently, the SASS may be recommended as a promising configuration alternative for the waste streams containing toxic compounds.

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Conventional activated sludge system, Inhibition, Respirometry, Selector activated sludge system, Synthetic organic chemicals, Waste-water, Filamentous bulking, Rcra compounds, Biodegradation, Kinetics, 4-chlorophenol, Chlorophenol, Chemicals, Bacteria, 2,4-DCP, Agriculture, Biotechnology & applied microbiology, Energy & fuels, Bioactivity, Biomass, Industrial chemicals, Organic chemicals, Organic compounds, Phenols, Toxicity, Activated sludge process, Activated sludge, Inhibition, Organic compound, Oxic conditions, Toxicity

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Eleren, S. C. ve Alkan, U. (2009). "Reducing effect of aerobic selector on the toxicity of synthetic organic compounds in activated sludge process". Bioresource Technology, 100(23), 5714-5720.

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