Fate of Benzalkonium Chloride in a Sewage Sludge Low Temperature Conversion Process Investigated by LC-LC/ESI-MS/MS

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Authors

  • Heike Sütterlin
  • Rainer Trittler
  • Sebastian Bojanowski
  • Ernst A. Stadlbauer
  • Klaus Kümmerer
Thermocatalytic low temperature conversion (LTC) is a new method for the disposal of sewage sludge. Using this method, sludge is converted into a residual solid (coal) along with reaction water, oil, and non-condensable gases. The oil can be used as an energy source and the coal as a substitute for charcoal. To this end, it is important to determine whether there are any easily available contaminants present in the coal generated by the process. Contaminants that can be strongly sorbed by sewage sludge solids are, e.g., pharmaceuticals and disinfectants. As an example the fate of the persistent and strong adsorbing disinfectant benzalkonium chloride (BAC) has been investigated within the LTC process. The sewage sludge was spiked with BAC and then subjected to the LTC process. The resulting coal was extracted and analyzed using LC-LC/ESI-MS/MS (ion trap). BAC could not be detected in the LTC coal, although it could be extracted from the spiked sludge before the LTC treatment. It can thus be concluded that the investigated compound is not easily available in the coal, and hence that its use does not present a risk. © 2007 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.
Original languageEnglish
JournalClean - Soil, Air, Water
Volume35
Issue number1
Pages (from-to)81-87
Number of pages7
DOIs
Publication statusPublished - 01.02.2007
Externally publishedYes

DOI

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