Removal of PFASs from sewage sludge by pyrolysis

0558498 - ÚCHP 2023 CZ eng K - Conference Paper (Czech conference)
Hušek, Matěj
Removal of PFASs from sewage sludge by pyrolysis.
Proceedings of Abstracts. Prague: Institute of Chemical Process Fundamentals of the CAS, 2022 - (Bendová, M.; Wagner, Z.), s. 8-9. ISBN 978-80-86186-24-5.
[Bažant Postgraduate Conference 2022. Prague (CZ), 13.06.2022-14.06.2022]
R&D Projects: GA MZe(CZ) QK21020022
Grant - others:AV ČR(CZ) StrategieAV21/3
Program: StrategieAV
Institutional support: RVO:67985858
Keywords : sewage sludge samples * pyrolysis * temperature
OECD category: Energy and fuels

Our work aimed to describe PFASs behaviour at different pyrolysis temperatures (200 to 700 °C). We analysed 37 PFAS in sewage sludge samples and pyrolysis products. The temperature at which PFASs were removed from the sewage sludge at more than 99.0% was 400 °C, and at 600 °C, removal was more than 99.9%. As a result, it is recommended for commercial sludge pyrolysis units (larger volume, lower material homogeneity) that the process temperature be not lower than 600 °C. This recommendation is supported and demonstrated by the analyses of samples from the Bohuslavice Trutnov WWTP (CZE), where the sludge pyrolysis unit is in operation.

Permanent Link: http://hdl.handle.net/11104/0332138