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Production of bio-fuels by high temperature pyrolysis of sewage sludge using conventional and microwave heating

AuthorsDomínguez Padilla, Antonio ; Menéndez Díaz, José Ángel ; Inguanzo Ojeda, Montserrat; Pis Martínez, José Juan
Sewage sludge
Issue Date10-Feb-2006
CitationBioresource Technology 97(10): 1185-1193 (2006)
AbstractThe pyrolysis of sewage sludge was investigated using microwave and electrical ovens as the sources of heat, and graphite and char as microwave absorbers. The main objective of this work was to maximize the gas yield and to assess its quality as a fuel and as a source of hydrogen or syngas (H2 + CO). Both gases were produced in a higher proportion by microwave pyrolysis than by conventional pyrolysis, with a maximum value of 38% for H2 and 66% for H2 + CO. The oils obtained were also characterized using FTIR and GC–MS. The use of conventional electrical heating in the pyrolysis of sewage sludge produced an oil that could have a significant environmental and toxicological impact. Conversely, microwave pyrolysis still preserved some of the functional groups of the initial sludge such as aliphatic and oxygenated compounds, whereas no heavy PACs were detected.
Description9 pages, 4 figures, 6 tables.-- PMID: 16473008 [PubMed].-- Printed version published Jul 2006.
Publisher version (URL)http://dx.doi.org/10.1016/j.biortech.2005.05.011
Appears in Collections:(INCAR) Artículos
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