Title:
Siloxanes Concentration and Removal in Biomethane from Sewage Sludge
Author(s):
Torre, M., Borin, D., Segreto, M., Tomassetti, L., Paolini, V., Petracchini, F., Paris, E., Gallucci, F., Scaglione, D.
Document(s):
Paper
Abstract:
This study reports the concentration level of volatile organic compounds (VOCs) including siloxanes in the biogas produced from sewage sludge in the municipality of Milan, Northern Italy. The obtained biogas was upgraded to biomethane in a pilot scale vacuum swing adsorption (VSA) plant based on activated carbon and zeolite 13X. The produced biomethane was also characterised in order to assess its suitability as automotive fuel. While critical levels were observed in the biogas for of H2S (1570 mg m-3) and HCl (26.8) were observed in biogas, halogenated VOCs and mercaptans were relatively low concentrated. High concentration of total volatile silicon (TVS) was confirmed in sewage sludge biogas, with a major contribution of siloxanes D5 and D4, while trimethylsilanol was below quantitation limit. The suitability of siloxane D5 as an indicator of total siloxanes is discussed. Results of this study demonstrate that siloxanes do not represent a critical issue for the VSA upgrading methodology.
Keywords:
biogas, sewage sludge, pollution
Topic:
Biomass Resources
Subtopic:
Municipal and industrial wastes
Event:
27th European Biomass Conference and Exhibition
Session:
1AV.2.5
Pages:
137 - 138
ISBN:
978-88-89407-19-6
Paper DOI:
10.5071/27thEUBCE2019-1AV.2.5
Price:
FREE
