Journal of Thermal Analysis and Calorimetry

, Volume 108, Issue 2, pp 769–775 | Cite as

Thermal analysis of soil amended with sewage sludge and biochar from sewage sludge pyrolysis



The main objective of the present study is to study the behaviour of sewage sludge and biochar from sewage sludge pyrolysis after addition to soil in a context of a temperate agricultural soil. For this, an incubation experiment was designed during 200 days. Carbon mineralization of soil amended with sewage sludge and biochar at two different rates (4 and 8 wt%) was evaluated. Differential thermal analysis, thermogravimetry and the first derivate of the TG were performed in oxidizing conditions on soil samples before and after incubation. Biochar obtained from sewage sludge pyrolysis at 500 °C was more stable in soil than original sewage sludge. After incubation experiment, the reduction of soil organic matter content was significantly lower in soil amended with biochar than in soil amended with sewage sludge. The thermostability index WL3/WL2 decreases after incubation in soil amended with biochar, however it increases in case of soil treated with sewage sludge.


Biochar Sewage sludge Thermal analysis Soil 


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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2011

Authors and Affiliations

  1. 1.Departamento de Edafología, E.T.S.I. AgrónomosUniversidad Politécnica de MadridMadridSpain
  2. 2.Departamento de Ingeniería de MaterialesE.T.S.I. Minas. Universidad Politécnica de MadridMadridSpain

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