Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
Agricultural valorisation of de-inking paper sludge as organic amendment in different soils: thermal study
Year:2009
Research Areas
  • Chemistry,
  • Agriculture
Information
Abstract
Paper pulp manufacturing separates cellulose fibres using both, mechanical and chemical process and generates important amount of waste materials. In recent years, an increasing proportion of recycled fibres are used in paper industries due to their important environmental and economical benefits. A ton of pulp produced from recycled paper requires 60% less energy to manufacture than a ton of bleached virgin kraft pulp1. However, paper recycling results in the production of large amounts of de-inking paper sludge (DPS) composed by removed inks, clay fillers, coating of used paper, chemical additives and some cellulose fibres. In Spain, more than 200.000t of DPS were produced during 2006. Due to their high organic matter content, DPS can be used as component of substrates2 or as amendment to improve or restore soil fertility and biological functioning3,4. Nevertheless, it is necessary to add a supplemental N due to the high ratio C/N of DPS. One of these sources could be sewage sludges (SL). The objective of this work is to study the influence of the addition of a mixture of DPS and SL (1:1 weight) at different rates (2%, 4% and 8%) in two soils with different pH, texture and organic matter content. For this reason, an incubation experiment was performed during 60 days. Final samples were analysed by FTIR, Hg porosimetry and Thermal analysis (TG, dTG and DTA). Results shown that soil respiratory activity, Total Mineralization Coefficient (CMT),Total organic carbon (TOC) and porosimetry of samples increased with the increment of the rates. However, The highest rates, the lowest is the Humification index (HI).This fact was corroborated by FTIR and thermal analysis results.
International
Si
Congress
MEDICTA 2009
960
Place
MARSELLA
Reviewers
Si
ISBN/ISSN
1388-6150
Start Date
15/06/2009
End Date
18/06/2009
From page
993
To page
998
MEDICTA2009 Special Issue
Participants
  • Autor: Gabriel Gasco Guerrero (UPM)
  • Autor: Antonio Saa Requejo (UPM)
  • Autor: Francisca Guerrero Lopez (UPM)
  • Autor: Ana Maria Mendez Lazaro (UPM)
  • Autor: Jose Manuel Fidalgo Alonso (UPM)
  • Autor: Sandra Paulina Barriga Curillo (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Valorización de Recursos
  • Centro o Instituto I+D+i: Centro de Estudios e Investigación para la Gestión de Riesgos Agrarios Medioambientales (CEIGRAM)
  • Departamento: Edafología
  • Departamento: Ingeniería de Materiales
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