Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.5/3363
Título: Testes de maturação aplicados a matrizes bioestabilizadas
Autor: Oliveira, Raquel Varagilal de
Orientador: Queda, Ana Cristina Ferreira da Cunha
Palavras-chave: compost
stability assessment
maturity assessment
compost quality
Data de Defesa: 2010
Editora: ISA
Resumo: The Municipal Solid Waste Organic Fraction (MSWOF) and sludge from wastewater treatment plants have, among the agricultural waste with interest, the greatest concern because of their potential on organic and inorganic contaminants and also due the large quantities produced. However, products obtained after their treatment can have agricultural interest since they fulfill the quality standards. Two nitrogen sources (sodium caseinate and soy beans) and a carbon source (starch, cellulose or sucrose) were added to composts from different sources. Mixtures were maintained in Dewar flasks during 10 days. Stability was evaluated using the following parameters: maximum temperature reached, respiratory activity (AT4) and Solvita®. The fastest increase of temperature was observed for composts with starch addition, which indicates higher microbial activity, so the application of stabilized composts to soils during the incorporation of biodegradable materials (with starch) can promote their biodegradability. Dewar test was more sensitive for the stability assessment. Results of Solvita® test at 24 hours were similar to Dewar test results. AT4 test gave different stability levels for composts with addition of carbon sources, but similar for the initial composts.
Descrição: Mestrado em Engenharia do Ambiente - Instituto Superior de Agronomia
URI: http://hdl.handle.net/10400.5/3363
Aparece nas colecções:BISA - Dissertações de Mestrado / Master Thesis

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