Portal de Periódicos da CAPES

The analysis of volatile siloxanes in waste activated sludge

2007; Elsevier BV; Volume: 74; Issue: 1 Linguagem: Inglês

10.1016/j.talanta.2007.05.041

1873-3573

Raf Dewil, Lise Appels, Jan Baeyens, Anna Buczynska, Luc Van Vaeck,

Water Treatment and Disinfection

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.