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Descripción
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| 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 pulp [1]. However, paper recycling results in the production of large amounts of de-inking paper sludge 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 could be used as amendment to improve or restore soil fertility and biological functioning [2, 3]. 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 present works deals with the study of feasibility of using DPS to produce substrates for plant production. The substrates tested were four mixtures of DPS and SL: 100% HP, 90% HP + 10% L (v/v), 80% HP + 20% L (v/v) and 70% HP + 30% L (v/v). Experimental results shown that the substrate 70% HP + 30% L presented the best hydrophysical properties while the others treatments presented limitations mainly due to their low available water values. Also, the biological activity was higher in the substrate 70% HP + 30% L according to its lower ratio C/N. | |
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Internacional
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Si |
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Nombre congreso
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EUROSOIL 2008 |
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Tipo de participación
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960 |
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Lugar del congreso
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Viena |
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Revisores
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Si |
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ISBN o ISSN
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978-3-902382-05-4 |
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DOI
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Fecha inicio congreso
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25/08/2008 |
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Fecha fin congreso
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29/08/2008 |
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Desde la página
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242 |
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Hasta la página
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243 |
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Título de las actas
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EUROSOIL 2008 |