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Registros recuperados: 7
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Aeration frequency on accelerated composting of animal carcasses Ciência e Agrotecnologia
Oliveira,Matias Marchesan de; Coldebella,Arlei; Belli Filho,Paulo; Oliveira,Paulo Armando Victória de.
ABSTRACT Rotary drum reactors (RDRs) for accelerated carcass composting are being installed in animal production units as an alternative for the disposal of pig and poultry carcasses in Brazil. The aim of the present study was to investigate the influence of aeration frequency on gas emissions (CO2-C, CH4-C, NH3-N and N2O-N) during composting of pig and poultry carcasses in RDRs. RDRs with a volume of 3.6 m3 (50% useful volume) were used. Aeration time was 24 minutes. Four intervals between aeration periods were tested (treatments) as follows: 1 hour (T1), 2 hours (T2), 3 hours (T3) and 4 hours (T4). Gas emissions were continuously monitored using a photoacoustic gas monitor (INNOVA 1412). Temperature was monitored using iButtons mixed with the biomass....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Rotary drum reactor; Poultry and pig; Gas emission.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542018000600653
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Constraints on fluid origins and migration velocities along the Marmara Main Fault (Sea of Marmara, Turkey) using helium isotopes ArchiMer
Burnard, P.; Bourlange, S.; Henry, Pierre; Geli, Louis; Tryon, M. D.; Natal'In, B.; Sengor, A. M. C.; Ozeren, M. S.; Cagatay, M. N..
Fluids venting from the submarine portion of the Marmara Main Fault (part of the North Anatolian Fault system, Turkey) were sampled in Ti bottles deployed by submersible. The fluids consist of mixtures of fault derived gases, fault related cold seep fluids, and ambient seawater; these components can readily be distinguished using the isotopes of He and the He/Ne ratios. He-3/He-4 ratios range between 0.03 +/- 0.1 and 4.9 +/- 0.4 Ra, indicating that both crustal and mantle derived sources of helium are sampled by the fault. The dominant gas in all the samples analyzed is methane with the abundance of CO2 below detection (<= 2%) in the mantle rich (high He-3/He-4) fluids. This is in contrast to nearly all mantle derived fluids where the C species are...
Tipo: Text Palavras-chave: Fluids; Gas emission; Helium; Marmara Sea; North Anatolian Fault.
Ano: 2012 URL: http://archimer.ifremer.fr/doc/00098/20954/18576.pdf
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Emissions from cattle farming in Brazil. Repositório Alice
GOULART, F. F.; PERFECTO, I.; VANDERMEER, J.; BOUCHER, D.; CHAPPELL, M. J.; FERNANDES, G. W.; SCARIOT, A.; SILVA, M. C. da; OLIVEIRA, W.; NEVILLE, R.; MOORE, J.; BUSTAMANTE, M.; CARVALHO, S. R.; SOARES-FILHO, B..
Tipo: Separatas Palavras-chave: Exotic grass; Gas emission.
Ano: 2016 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1055468
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Gas emission and efficiency of an engine-generator set running on biogas REA
SOUZA,SAMUEL N. M. DE; LENZ,ANDERSON M.; WERNCKE,IVAN; NOGUEIRA,CARLOS E. C.; ANTONELLI,JHONATAS; SOUZA,JULIANO DE.
ABSTRACT In Brazil there is a wide availability of residues, which have been used in the production of biogas and biofertilizers. The engine-generator by biogas is grid connected, and produce electricity for self-consumption and the surplus is inserted into the grid. The aim of the present study was to evaluate energetic efficiency and exhaust gas emission of two cases: two engine-generators sets of 100 kVA running on biogas, produced from residues of a poultry slaughterhouse unit (PSU) and swine fattening unit (SFU). Load variation in the engine-generator set was evaluated in the SMCP (system of protection and synchronism). There was an increase in the emission of nitrogen oxide, sulfur dioxide and exhaust gas temperature, in both cases. The elevation in...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biofuel; Energy efficiency; Organic waste; Gas emission.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162016000400613
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Gas emissions and active tectonics within the submerged section of the North Anatolian Fault zone in the Sea of Marmara ArchiMer
Geli, Louis; Henry, P; Zitter, T; Dupre, Stephanie; Tryon, M; Cagatay, M; De Lepinay, B; Le Pichon, X; Sengor, A; Gorur, N; Natalin, B; Ucarkus, G; Oezeren, S; Volker, D; Gasperini, L; Burnard, P; Bourlange, S.
The submerged section of the North Anatolian fault within the Marmara Sea was investigated using acoustic techniques and submersible dives. Most gas emissions in the water column were found near the surface expression of known active faults. Gas emissions are unevenly distributed. The linear fault segment crossing the Central High and forming a seismic gap - as it has not ruptured since 1766, based on historical seismicity [Ambraseys, N.N., and Jackson, J.A., (2000), Seismicity of the Sea of Marmara (Turkey) since 1500, Geophys. J. Int., 141, (3), F1-F6. (doi:10.1046/j.1365-246x.2000.00137.x: Ambraseys, N., (2002), The seismic activity of the Marmara Region over the last 2000 years, Bull. Seism. Soc. Am., 92, 1-18; Parson, T., (2004), Recalculated...
Tipo: Text Palavras-chave: North Anatolian Fault; Marmara Sea; Gas emission; Fluids; Seismicity.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/publication-4681.pdf
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Methane release from warming-induced hydrate dissociation in the West Svalbard continental margin: Timing, rates, and geological controls ArchiMer
Thatcher, K. E.; Westbrook, Graham; Sarkar, S.; Minshull, T. A..
Hundreds of plumes of methane bubbles, first observed in 2008, emanate from an area of the seabed off West Svalbard that has become 1 degrees C warmer over the past 30 years. The distribution of the plumes, lying close to and upslope from the present upper limit of the methane hydrate stability zone, indicates that methane in the plumes could come from warming-induced hydrate dissociation, a process commonly invoked as contributing to rapid climate change. We used numerical modeling to investigate the response of hydrate beneath the seabed to changes in bottom-water temperature over periods of up to 1000 years B. P. The delay between the onset of warming and emission of gas, resulting from the time taken for thermal diffusion, hydrate dissociation, and gas...
Tipo: Text Palavras-chave: Methane hydrate; Gas emission; Arctic warming; Geological controls; Thermal history.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00137/24779/22838.pdf
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The influence of the season of the year and of dilution on the development of swine manure and wood shaves co-composting REA
Higarashi,Martha M.; Sardá,Luana G.; Oliveira,Paulo A. V..
The objective of this research was to study the influence of factors related to the proper management of pig manure (lower dilution) and the season of the year in the progress of the co-composting of pig manure with wood shavings and in the final quality of the compost resulting from the treatments. In the first experiment, two types of swine manure were used: a diluted one (2% Dry Matter - DM), typical from the management usually used in Brazil, and a more concentrated one (6% DM). The manures were incorporated into the wood shavings (6L:1kg) over the course of four weeks. The development of composting was accompanied by monitoring of temperatures inside the piles and the emission of CO2 and CH4 gases during 65 days, including the period of incorporation....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Pig farming; Manure management; Compost; Gas emission.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162012000200004
Registros recuperados: 7
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