Consulta: subjectFacets:"Gas concentration"
Registros recuperados: 3
Data/hora: 26/07/2024 22:44:22

Air quality in swine growing and finishing facilities with different building typologies
Provedor de dados: Revista Brasileira de Engenharia Agrícola e Ambiental
Autores: Cecchin,Daiane; Campos,Alessandro T.; Cruz,Vasco F. da; Sousa,Francine A.; Amaral,Pedro I. S.; Yanagi Junior,Tadayuki.
ABSTRACT The objective of this study was to evaluate the concentration of gases in three swine growing and finishing facilities with different building typologies, regarding floor and dividers. The experiment compared three treatments: pen with water depth, pen with partially slotted floor on the sides, and pen with partially slotted floor on sides and in the center. Measurements of instantaneous concentrations of ammonia (NH3 ppm) and carbon dioxide (CO2 ppm) were taken at animal level. The levels of sound pressure (dB) at animal level and at 1.50 m from the floor were also recorded. It was observed that the pen with water depth was the one with the highest average concentration of NH3. Although there was a significant difference in CO2 concentrations,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Animal welfare; Rural buildings; Gas concentration; Sound pressure.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000500339

Impact of different light sources on broiler rearing environment
Provedor de dados: Engenharia Agrícola
Autores: Lima,Karla A. O.; Nääs,Irenilza de A.; Garcia,Rodrigo G.; Borille,Rodrigo; Caldara,Fabiana R.
Broiler production is highly dependent on the use of artificial light. The light source may affect the effectiveness of housing conditions due to increasing ambient temperature and concentration of noxious gases. This research aimed to evaluate the effects of different bulb types on the thermal, aerial, and acoustic environment of broiler aviaries. The experiment was carried out at a commercial broiler farm in Dourados, Mato Grosso do Sul State, Brazil. Three aviaries were used, and two flocks of male broilers from Cobb® genetic strain were reared from the first day to slaughter. Each aviary was equipped with a different light source, comprising the adopted treatments (A1 - incandescent light bulb, control; A2 - sodium vapor light bulb; A3 - fluorescent...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Poultry industry; Gas concentration; Lighting; Temperature.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162014000300006

Influence of different systems of minimum ventilation on air quality in broiler houses
Provedor de dados: Engenharia Agrícola
Autores: Menegali,Irene; Tinôco,Ilda F. F.; Zolnier,Sérgio; Carvalho,Cinara da C. S.; Guimarães,Maria C. de C.
To maintain a competitive development of the Brazilian aviculture, some measures must be taken to enable the identification and reduction of risks to the health of birds, as well as for the physical environment. Therefore, the aim of this study was to evaluate the effectiveness of three different systems of minimum ventilation (positive pressure - SVMP, negative pressure - SVMN and natural ventilation - SVMNat) in the air quality during the first 21 days of life of broiler chicks, during winter. Three points were selected along the length to verify ammonia, carbon monoxide and oxygen concentrations at 3a.m., 9a.m., 3p.m. and 9p.m., by the respiration level of birds and workers. The averages of pollutant gases did not exceed the tolerance levels for the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aviculture; Broiler chicks; Gas concentration; Air renovation.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162012000600003