Data/hora: 22/09/2024 11:04:29

Biblioteca(s): 	Embrapa Solos.	
Data corrente: 	02/02/2016	
Data da última atualização: 	02/02/2016	
Autoria: 	INACIO, C. T.; URQUIAGA, S.; CHALK, P. M.; ALVES, B. J. R.	
Afiliação: 	CAIO DE TEVES INACIO, CNPS; SEGUNDO SACRAMENTO U CABALLERO, CNPAB; P. M. CHALK; BRUNO JOSE RODRIGUES ALVES, CNPAB.	
Título: 	Nitrogen loss (NH3, N2O) patterns in bench-scale composting.	
Ano de publicação: 	2015	
Fonte/Imprenta: 	In: SIMPÓSIO INTERNACIONAL SOBRE GERENCIAMENTO DE RESÍDUOS AGROPECUÁRIOS E AGROINDUSTRIAIS, 4., 2015, Rio de Janeiro. Anais... Brasília, DF: Embrapa, 2015.	
Idioma: 	Inglês	
Conteúdo: 	Nitrogen (N) losses during composting reduce the value of the end product as a fertilizer. Nitrogen is lost during composting mainly by ammonia (NH3) volatilization in the thermophilic phase. We used three bench-scale aerobic bioreactors with a controlled temperature difference (CDT) system as an experimental approach to investigate the pattern of N losses during composting. N2O peak emission occurred much earlier (7h) than NH3 volatilization (48-60h) during the thermophilic phase (~55°C) of bench-scale composting. The NH3 volatilization peak rate occurred following the greater biological activity (O2 consumed/CO2 evolved) at 40°C which could coincide with greater ammonification, but immobilization of NH4+/NH3 also occurs at this point affecting NH3 volatilization. Differences in temperature curves and accumulated NH3-N were related to the biological activity in each vessel. Therefore, O2 consumed/CO2 evolved measurements must be part of the evaluation of composting in further studies for comparisons of techniques to reduce NH3 volatilization	
Palavras-Chave: 	Biorreatores; Estrume de cavalo; Método respirométrico.	
Categoria do assunto: 	P Recursos Naturais, Ciências Ambientais e da Terra	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/item/138269/1/2015-158.pdf	
Registro original: 	Embrapa Solos (CNPS)	
Exemplares: 	CNPS - (19177-1) - UPC - AA - DD -  -  - 2016.00075 - DIS