Data/hora: 10/06/2024 06:24:51

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