Cod Fractions In Mechanical-Biological Wastewater Treatment Plant
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University of Zielona Gora, Institute of Environmental Engineering, Szafrana st 15, 65-246 Zielona Góra, Poland
Online publication date: 2017-05-17
Publication date: 2017-03-28
Civil and Environmental Engineering Reports 2017;24(1):207-217
The paper presents results of studies concerning the designation of COD fraction in the raw, mechanically treated and biologically treated wastewater. The test object was a wastewater treatment plant with the output of over 20,000 PE. The results were compared with data received in the ASM models. During investigation following fractions of COD were determined: dissolved non-biodegradable SI, dissolved easily biodegradable SS, in organic suspension slowly degradable XS and in organic suspension non-biodegradable XI. Methodology for determining the COD fraction was based on the guidelines ATV-A 131. The real percentage of each fraction in total COD in raw wastewater are different from data received in ASM models.
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