Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.5/5005
Título: Efeito da digestão anaeróbia e da estabilização com cal na mineralização do carbono e do azoto de lamas de ETAR
Outros títulos: Effect of anaerobic digestion and lime stabilization on sewage sludge carbon and nitrogen mineralization
Autor: Bancessi, Aducabe
Ribeiro, Henrique Manuel
Fangueiro, David
Duarte, Elisabeth
Cabral, Fernanda
Vasconcelos, Ernesto
Palavras-chave: nitrogen
carbon
stabilization
sewage sludge
mineralization
Data: 2011
Editora: SCAP
Citação: "Revista de Ciências Agrárias". ISSN 0871-018x. 34 (2) (2011) 131-140
Resumo: This work aims to evaluate the N and C mineralization in a Haplic Arenosol amended with 3 different sewage sludge: mixture of primary and secondary sewage sludge (MSS), anaerobically digested sewage sludge (DSS) and anaerobically digested sewage sludge treated with quicklime (LimeDSS). Two aerobic incubations, one to follow N mineralization and the other one to assess CO2 emissions, were performed during 140 days. MSS promoted soil N immobilization during the first days of incubation and higher CO2 emissions (46% of the applied C was lost), consequence of a high content of non-stabilized organic matter. In DSS there was nitrogen net mineralization but only 17% of the applied carbon was mineralized, showing that anaerobic digestion stabilized the sludge organic matter. Sewage sludge treatment with quicklime reduced its NH4+ content, but enhanced carbon (40%) and nitrogen (39.2%) mineralization after soil application. Anaerobic digested sewage sludge (DSS) seems to be the most interesting treatment, since it ensured a high level of available N to plants and a great contribution to C sequestra-tion in soil.
Peer review: yes
URI: http://hdl.handle.net/10400.5/5005
ISSN: 0871-018x
Aparece nas colecções:DCEB - Artigos de Revistas

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