The Characteristics of Organic Compounds in Landfill Leachate Biologically Treated in Different Technological Conditions
Justyna Koc-Jurczyk 1  
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University of Rzeszow, College of Natural Sciences, Institute of Agricultural Sciences, Land Management and Environmental Protection, st. Cwiklinskiej 1a, 35-601 Rzeszow, Poland
CORRESPONDING AUTHOR
Justyna Koc-Jurczyk   

University of Rzeszow, College of Natural Sciences, Institute of Agricultural Sciences, Land Management and Environmental Protection, st. Cwiklinskiej 1a, 35-601 Rzeszow, Poland
Publication date: 2020-04-01
 
J. Ecol. Eng. 2020; 21(3):104–111
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ABSTRACT
In this work semisynthetic wastewater made of leachate derived from non-hazardous municipal waste landfill in Kozodrza (south-eastern Poland) and supplemented by ammonium, was treated in a hybrid SBRs to assess the removal efficiency of organic compounds, including humic substances and dissolved fractions, depending of technological conditions. The technological layout variants concerned both volumetric proportions of aerated and anoxic zones (0.33 and 0.66) together with N/C ratio (0.1 and 0.2). It was found that the efficiency of organic compounds removal (expressed as COD, BOD5 and TOC) was influenced by geometry of oxygen supply; in SBRs operating with 0.33 ratio it was significantly higher compared to 0.75 ratio. The analysis also revealed that N/C ratio set at 0.1 resulted in higher treatment efficiency than obtained for 0.2. The composition of dissolved organic fractions in outflows was also related both with the SBRs geometry and the N/C ratio. It was found that proportions of TOC and humic substances were significantly lower in SBRs operating with aeration geometry of 0.33, compared to SBRs working with 0.66. Also, the N/C ratio of 0.1 led to higher content of dissolved humic substances and COD in outflows.