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Description: The Impact Of Process Parameters On The Amount Of Micropollutant In The Generated...
The Impact Of Process Parameters On The Amount Of Micropollutant In The Generated End Products During Sewage Sludge Pyrolysis
Abstract
The use of biochar from sewage sludge as a soil amendment requires ensuring a minimal and safe pollutant load. However, sewage sludge can contain various micropollutants such as PFAS, polyaromatic hydrocarbons (PAHs) and dioxins. Data is lacking to guarantee the purity of biochar, hence institutions such as the European Commission banned its application as a soil amendment in agriculture. This study aims to determine pyrolysis process parameters that ensure the production of safe biochar according to available regulations. Pilot-scale tests demonstrated that increasing the pyrolysis temperature and adding a carrier gas during pyrolysis and cooling stages reduce the amount of micro-pollutants in biochar. Additionally, biochemical methane potential tests of the aqueous pyrolysis liquid showed its suitability as a co-substrate for anaerobic digestion. Overall, the findings of this research highlight that pyrolysis can serve as a suitable process for transforming sewage sludge into valuable end-products.
Pyrolysis of sewage sludge can provide valuable end-products such as biochar, aqueous pyrolysis liquid, oil and gas phases. However, the use of biochar obtained from sewage sludge in agriculture is currently banned by the European Commission due to the uncertainty that it is free of pollutants. This work studies the optimal process parameters to reduce micro-pollutants in biochar using a pilot-scale pyrolysis plant. Moreover, the potential of APL as substrate for biogas production is assessed.
SpeakerSchlederer, Felizitas
Presentation time
14:30:00
14:50:00
Session time
13:30:00
15:00:00
SessionBehavior of Emerging Contaminants in Thermal Treatment Processes
Session locationRoom S503 - Level 5
TopicIntermediate Level, Microconstituents and Contaminants of Emerging Concern (Non-PFAS), PFAS
TopicIntermediate Level, Microconstituents and Contaminants of Emerging Concern (Non-PFAS), PFAS
Author(s)
Schlederer, Felizitas
Author(s)F. Schlederer 1; F. Schlederer 1 ; E. Martín-Hernández 2; C. Vaneeckhaute 3;
Author affiliation(s)BioEngine Research Team on Green Process Engineering and Biorefineries, Department of Chemical Engineering, Université Laval, Québec, QC, Canada. CentrEau Water Research Center, 1065 Avenue de la Médecine, Québec, QC, Canada 1; BioEngine Research Team on Green Process Engineering and Biorefineries, Department of Chemical Engineering, Université Laval, Québec, QC, Canada. CentrEau Water Research Center, 1065 Avenue de la Médecine, Québec, QC, Canada 1 ; BioEngine Research Team on Green Process Engineering and Biorefineries, Department of Chemical Engineering, Université Laval, Québec, QC, Canada. CentrEau Water Research Center, 1065 Avenue de la Médecine, Québec, QC, Canada 2; BioEngine Research Team on Green Process Engineering and Biorefineries, Department of Chemical Engineering, Université Laval, Québec, QC, Canada. CentrEau Water Research Center, 1065 Avenue de la Médecine, Québec, QC, Canada 3;
SourceProceedings of the Water Environment Federation
Document typeConference Paper
PublisherWater Environment Federation
Print publication date Oct 2023
DOI10.2175/193864718825159083
Volume / Issue
Content sourceWEFTEC
Copyright2023
Word count20

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