Characterization of spontaneous combustuion tendency of dried sewage sludge

Medic Pejic, Ljiljana; Fernández Áñez, María de las Nieves; Montenegro Mateos, Lucía; García Torrent, Javier y Ramírez Gómez, Álvaro (2014). Characterization of spontaneous combustuion tendency of dried sewage sludge. En: "Tenth International Symposium on Hazards, Prevention, and Mitigation of Industrial Explosions (X ISHPMIE)", 10/06/2014 - 14/06/2014, Bergen, Norway. pp. 1453-1462.

Descripción

Título: Characterization of spontaneous combustuion tendency of dried sewage sludge
Autor/es:
  • Medic Pejic, Ljiljana
  • Fernández Áñez, María de las Nieves
  • Montenegro Mateos, Lucía
  • García Torrent, Javier
  • Ramírez Gómez, Álvaro
Tipo de Documento: Ponencia en Congreso o Jornada (Artículo)
Título del Evento: Tenth International Symposium on Hazards, Prevention, and Mitigation of Industrial Explosions (X ISHPMIE)
Fechas del Evento: 10/06/2014 - 14/06/2014
Lugar del Evento: Bergen, Norway
Título del Libro: Proceedings of Tenth International Symposium on Hazards, Prevention, and Mitigation of Industrial Explosions (X ISHPMIE)
Fecha: 2014
Materias:
Escuela: E.T.S.I. de Minas y Energía (UPM)
Departamento: Ingeniería Química y Combustibles [hasta 2014]
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

The general purpose of this study was the determination of the safety conditions to avoid the presence of explosive atmospheres in the wastewater industry. Eight Spanish plants located in Madrid, Barcelona and Málaga were considered and several sludge samples were taken in different seasons. The base for the assessment of the spontaneous ignition behaviour of dust accumulations is the experimental determination of the self-ignition temperature under isothermal conditions. Self-ignition temperatures at four volumes were obtained for one sample of sewage sludge, allowing their extrapolation to large storage facilities. A simple test method, based also on an isothermal study of samples, is the UN classification of substances liable to spontaneous combustion. Two different samples were so tested, obtaining unlike results if transported in packages of different volumes. By means of thermogravimetric techniques it is possible to analyse the thermal susceptibility of dried sewage sludge. Apparent activation energy can be obtained from the rate of weight loss. It is also applied to the study of self-ignition susceptibility by modifying test conditions when oxygen stream is introduced. As a consequence of this oxidant contribution, sample behaviour can be very different during testing and a step drop or sudden loss of weight is observed at a characteristic temperature for every substance, associated to a rapid combustion. Plotting both the activation energy and the characteristic temperature, a map of self-ignition risk was obtained for 10 samples, showing different risk levels for samples taken in different locations and at different seasons. A prediction of the self-ignition risk level can be also determined.

Más información

ID de Registro: 30667
Identificador DC: http://oa.upm.es/30667/
Identificador OAI: oai:oa.upm.es:30667
Depositado por: Memoria Investigacion
Depositado el: 01 Sep 2014 09:50
Ultima Modificación: 22 Abr 2016 00:56
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