Memorias de investigación
Ponencias en congresos:
Characterization of spontaneous combustuion tendency of dried sewage sludge
Año:2014
Áreas de investigación
  • Ingenierías
Datos
Descripción
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.
Internacional
Si
Nombre congreso
Tenth International Symposium on Hazards, Prevention, and Mitigation of Industrial Explosions (X ISHPMIE)
Tipo de participación
960
Lugar del congreso
Bergen, Norway
Revisores
Si
ISBN o ISSN
978-82-999-683-0-0
DOI
Fecha inicio congreso
10/06/2014
Fecha fin congreso
14/06/2014
Desde la página
1453
Hasta la página
1462
Título de las actas
Proceedings of Tenth International Symposium on Hazards, Prevention, and Mitigation of Industrial Explosions (X ISHPMIE)
Esta actividad pertenece a memorias de investigación
Participantes
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Seguridad Industrial: atmósferas explosivas
  • Grupo de Investigación: Edificación, Infraestructura y Proyectos en Ingeniería Rural y Medioambiental (EIPIRMA)
  • Departamento: Energía y Combustibles