Home Itens selecionados Provedores de dados OAI Créditos Sobre Ajuda

			Busca avançada
	Provedor de dados REA (4) AGRIAMBI (1) Autor Lima,Julião S. de S. (5) Passos,Renato R. (2) Silva,Samuel de A. (2) Xavier,Alexandre C. (2) Almeida,Samira L. H. de (1) Capelini,Vinicius A. (1) Cecílio,Roberto A. (1) Oliveira II,Paulo C. (1) Oliveira,Paulo C. de (1) Oliveira,Rone B. de (1) Pezzopane,José E. M. (1) Pruski,Fernando F. (1) Reis,Edvaldo F. dos (1) Rosas,Jorge T. F. (1) Sattler,Marcos A. (1) Silva,Alessandra F. da (1) Souza,Gustavo S. de (1) Mais... Palavra-chave Geoestatística (2) Geostatistics (2) Manejo do solo (2) Climate change (1) Geoprocessamento (1) Hydrology (1) Intensity-duration-frequency equation (1) Microclima (1) Moniliophthora roreri (1) Precision phytopathology (1) Semivariograma (1) Sombreamento (1) Tela plástica (1) Theobroma cacao (1) Mais... Tipo do documento Info:eu-repo/semantics/article (5) Ano 2020 (1) 2014 (1) 2009 (1) 2008 (1) 2004 (1) País Brazil (5) Idioma Português (3) Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 22 Primeira ... 1 2 ... Última The potential of denitrification for the stabilization of activated sludge processes affected by low alkalinity problems BABT Hoffmann,Heike; Costa,Tatiana Barbosa da; Wolff,Delmira Beatriz; Platzer,Christoph; Costa,Rejane Helena Ribeiro da. In this study, the problems provoked by nitrification of wastewater with low alkalinity were analyzed in a pilot sequencing batch activated sludge reactor (SBR). Decrease in pH resulted in disappearence of protozoa. De-flocculation of the activated sludge floc started below pH 6.5, resulting in enhanced effluent turbidity and loss of bacteria. Nitrification efficiency was affected below pH 6.2. The denitrification activity was not sufficient to keep up the pH, due to a low C/N ratio of the wastewater. Based on alkalinity and ammonia concentration of the wastewater and the necessary denitrification rate to prevent operational problems, was developed a prognostic diagram. The applicability of this diagram was tested for the SBR with excellent results. The... Tipo: Info:eu-repo/semantics/article Palavras-chave: Alkalinity; Activated sludge; Nitrification; Denitrification. Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132007000200018 Greenhouse Gas (CO2 AND N2O) Emissions from Soils: A Review Chilean J. Agric. Res. Muñoz,Cristina; Paulino,Leandro; Monreal,Carlos; Zagal,Erick. In agricultural activities, the main greenhouse gases (GHG) are those related to C and N global cycles. The impact of agriculture on GHG emissions has become a key issue, especially when considering that natural C and N cycles are influenced by agricultural development. This review focuses on CO2 and N2O soil emissions in terrestrial ecosystems, with emphasis in Chilean and similar agro-ecosystems around the world. The influence of land use and crop management practices on CO2 and N2O emissions is analyzed; some mitigation measures to reduce such emissions are also discussed here. More knowledge on the biological processes that promote of GHG emissions from soil will allow creating opportunities for agricultural development under friendly-environmental... Tipo: Journal article Palavras-chave: Global warming; Carbon dioxide; Nitrous oxide; Soil biological processes; Soil organic carbon; Nitrification; Denitrification. Ano: 2010 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392010000300016 Registros recuperados: 22 Primeira ... 1 2 ... Última

Empresa Brasileira de Pesquisa Agropecuária - Embrapa Todos os direitos reservados, conforme Lei n° 9.610 Política de Privacidade Área restrita		Embrapa Parque Estação Biológica - PqEB s/n° Brasília, DF - Brasil - CEP 70770-901 Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco