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Removal of Refractory Pollutants from Landfill Leachate Using Two-Phase System

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Abstract:

ABSTRACT: 

The study focused on the problem of removing refractory substances from leachate treated by means of activated sludge method and advanced oxidation process. Biological treatment was conducted in sequencing batch biofilm reactor. Biologically treated leachate was subject to further chemical treatment with the use of Fenton reagent. The permanent dosage of H2O2 amounting to 2 mg·L−1 was applied. Fe(II):H2O2 ratio was 1:10, 1:5 and 1:3. Biological treatment allowed for removing 97% of benzene and only 20% of ethylbenzene. There was a 25% decrease in the concentration of volatile organochlorine compounds. The concentration of benzene in chemically treated leachate increased in comparison with the value found in biologically treated leachate and the growth coincided with the decreasing Fe(II):H2O2 ratio. An analysis of polycyclic aromatic hydrocarbons showed that leachate subjected to advanced oxidation contained the sum of polycyclic aromatic hydrocarbons that was lower than in biologically treated leachate, irrespective of Fe(II):H2O2 ratio.

Keywords: advanced oxidation methods; landfill leachates; polycyclic aromatic hydrocarbons PAHs; refractory pollutants; sequencing batch biofilm reactor

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/106143013X13807328848810

Affiliations: University of Rzeszow, Faculty of Biology and Agriculture, Department of Biological Basis of Agriculture and Environmental Education, 2 Cwiklinskiej St., 35–601 Rzeszow, Poland

Publication date: January 1, 2014

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  • Water Environment Research® (WER®) publishes peer-reviewed research papers, research notes, state-of-the-art and critical reviews on original, fundamental and applied research in all scientific and technical areas related to water quality, pollution control, and management. An annual Literature Review provides a review of published books and articles on water quality topics from the previous year.

    Published as: Sewage Works Journal, 1928 - 1949; Sewage and Industrial Wastes, 1950 - 1959; Journal Water Pollution Control Federation, 1959 - Oct 1989; Research Journal Water Pollution Control Federation, Nov 1989 - 1991; Water Environment Research, 1992 - present.
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