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The analysis of volatile siloxanes in waste activated sludge |
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| Authors: | Dewil Raf Appels Lise Baeyens Jan Buczynska Anna Van Vaeck Luc |
| Affiliation: | a Department of Bioscience Engineering, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium b Department of Chemical Engineering, Catholic University of Leuven, W. De Croylaan 48, B-3001 Heverlee, Belgium c Department of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom d Department of Chemistry, University of Antwerp, Universiteitsplein 1, B-2610 Antwerp, Belgium |
| Abstract: | The increasing presence of siloxanes in waste activated sludge (WAS) considerably hampers the energy use of the biogas obtained during the anaerobic digestion of the sludge when concentrations exceed critical limits. To prevent the occurrence of unacceptable operating conditions, it is hence necessary to have a reliable analysis method for determining the siloxane content of the sludge. This paper describes and validates such a method, consisting of the extraction of the siloxanes using n-hexane and a subsequent analysis of the extract using GC-FID. The validation procedure confirms the excellent recovery and repeatability of the proposed method. |
| Keywords: | Waste activated sludge Volatile siloxanes D4 D5 Extraction Gas chromatography |
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