Influence of different systems of minimum ventilation on air quality in broiler houses

Menegali, Irene; Tinôco, Ilda de Fátima Ferreira; Zolnier, Sérgio; Carvalho, Cínara da Cunha Siqueira; Guimarães, Maria Clara Carvalho

doi:10.1590/s0100-69162012000600003

Cited by 10 publications

(9 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Mean values of RH did not differ between houses; however, an interaction between the "house" and "age of broilers" factors was identified at 35 and 42 d of growth. The change in pH depends on the age of the birds, and it may be attributed to the effect of litter temperature, ambient temperature and density of birds (Pescatore et al, 2005;Menegali et al, 2012). The pH of litter also influences the release of ammonia, which is maximized at levels of pH above 7.0.…”

Section: Resultsmentioning

confidence: 99%

“…The small air exchange, high humidity, temperature and pH, and type of litter management may induce greenhouse gas emissions (Menegali et al, 2012).…”

Section: Resultsmentioning

confidence: 99%

“…Ammonia (NH 3 ) emission is the process of NH 3 emission from litter to air, and it may cause eutrophication in the environment (UNFCCC, 1997). Ammonia emissions from poultry houses are a function of the NH 3 concentration inside the housing, which is related to rearing flock density, quality of litter, birds' diet and ventilation system Ndegwa et al, 2008;Harper et al, 2010;Menegali et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Model-predicted ammonia emission from two broiler houses with different rearing systems

Lima

Garcia

Nääs

et al. 2015

Sci. agric. (Piracicaba, Braz.)

View full text Add to dashboard Cite

Ammonia (NH 3 ) emissions from broiler production can affect human and animal health and may cause acidification and eutrophication of the surrounding environment. This study aimed to estimate ammonia emissions from broiler litter in two systems of forced ventilation, the tunnel ventilation (TV) and the dark house (DH). The experiment was carried out on eight commercial broiler houses, and the age of the birds (day, d), pH and litter temperature were recorded.Broilers were reared on built-up wood shaving litter using an average flock density of 14 bird m -².Temperature and relative humidity inside the broiler houses were recorded in the morning during the grow-out period. A factorial experimental design was adopted, with two types of houses, four replicates and two flocks with two replicates each. A deterministic model was used to predict ammonia emissions using the litter pH and temperature, and the day of grow-out. . Model-predicted ammonia emissions provided comprehensible estimations and might be used in abatement strategies for NH 3 emission.

show abstract

Section: Resultsmentioning

confidence: 99%

“…The small air exchange, high humidity, temperature and pH, and type of litter management may induce greenhouse gas emissions (Menegali et al, 2012).…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Model-predicted ammonia emission from two broiler houses with different rearing systems

Lima

Garcia

Nääs

et al. 2015

Sci. agric. (Piracicaba, Braz.)

View full text Add to dashboard Cite

show abstract

“…Com relação à saúde das aves, os valores também estão abaixo do limite recomendado por Wathes et al (1998) e Nääs et al (2007, que é de 20 ppm, sendo que, acima deste limite o animal se torna susceptível a doenças. Os valores encontrados, inferiores a 20 ppm, estão de acordo com os relatados por vários autores em diferentes tipos de galpões (Nääs et al, 2007;Vitorasso & Pereira, 2009;Furtado et al, 2010;Menegali et al, 2012).…”

Section: Resultsunclassified

Ambiente acústico e aéreo em galpão comercial para poedeiras Dekalb Brown cercados por tela PEAD

Lourençoni

Yanagi

Campos

et al. 2015

Rev. bras. eng. agríc. ambient.

View full text Add to dashboard Cite

R E S U M ODevido às ocorrências dos vírus de influenza aviária (H5N1 e H7N2), estudos relacionados à biosseguridade têm sido intensificados em que uma das soluções discutidas é o uso de tela para cercar a área dos galpões evitando o contato das galinhas poedeiras alojadas com outras aves. Neste contexto objetivou-se, com o presente trabalho, avaliar e comparar a utilização de tela para cercar o perímetro de um galpão visando à criação de galinhas poedeiras, sobre o ambiente acústico e aéreo no interior da instalação. Esta pesquisa foi realizada em um galpão comercial do tipo californiano para criação de galinhas poedeiras da linhagem Dekalb Brown. Metade da área do galpão foi cercada por tela de polietileno de alta densidade (PEAD) e a outra metade foi mantida totalmente aberta. Os níveis de ruído, concentração de amônia (NH 3 ) e concentração de dióxido de carbono (CO 2 ) foram mensurados durante 22 semanas. O uso de tela PEAD aumentou o nível de ruído e as concentrações de NH 3 e de CO 2 no interior da instalação; entretanto, esses valores foram inferiores àqueles que oferecem riscos à saúde das aves e dos trabalhadores. Acoustic and aerial environments in commercial shed of Dekalb Brown laying hens enclosed with HDPE screen A B S T R A C TDue to the occurrence of the avian influenza viruses (H5N1 and H7N2), studies related to biosafety have been intensified, and one of the discussed solutions is the use of screen to enclose the poultry house area, avoiding the contact of the housed laying hens with other birds. In this context, the aim of the present study was to evaluate and to compare the use of screen, to enclose the perimeter of a laying hen house, on the acoustic and aerial environments inside the facility. This research was carried out in a Californian Dekalb Brown laying hen house. Half of the barn area was enclosed by high density polyethylene (HDPE) screen and the other half was maintained completely open. The levels of noise, ammonia (NH 3 ) concentration and carbon dioxide (CO 2 ) concentration were measured during 22 weeks. The use of HDPE screen increased the noise level and the concentrations of NH 3 and CO 2 inside of the facility, however, these values were smaller than those which offer health risks to the birds and workers.

show abstract

“…Estes valores também são menores que o limite de 20 ppm, valor a partir do qual o animal se torna suscetível a doenças (WATHES et al, 1998;NÄÄS et al, 2007), e que corroboram os valores relatados por vários autores (NÄÄS et al, 2007;VITORASSO & PEREIRA, 2009;FURTADO et al, 2010;MENEGALI et al, 2012 …”

Section: Período Utilização De Telaunclassified

Condições ambientais em galpão convencional telado para galinhas poedeiras hyline W-36

Lourençoni¹,

Yanagi²,

Oliveira³

et al. 2015

Eng. Agríc.

View full text Add to dashboard Cite

RESUMO:Devido às ocorrências dos vírus de influenza aviária (H5N1 e H7N2), estudos relacionados à biosseguridade têm-se intensificado, e uma das soluções discutidas é o uso de tela para cercar completamente o perímetro dos galpões, visando a evitar o contato das galinhas poedeiras alojadas com outras aves. Desta forma, o presente trabalho teve como objetivo avaliar e comparar a utilização de tela cercando o perímetro de galpões convencionais de poedeiras, sobre o ambiente acústico e aéreo no interior da instalação. A pesquisa foi realizada em uma granja comercial para produção de ovos, localizada no sul do Estado de Minas Gerais, e foi conduzida em um galpão aberto, que teve a metade de sua área cercada por tela e a outra metade mantida totalmente aberta. Foram alojadas galinhas poedeiras da linhagem Hyline W-36, sendo analisadas as variáveis de intensidade sonora, concentração de amônia (NH 3 ) e concentração de dióxido de carbono (CO 2 ). As variáveis foram coletadas em seis pontos de medição, em cada região (com e sem tela), dois em cada corredor (norte, central e sul). Os resultados indicaram que o uso de tela não alterou o nível de ruído e as concentrações de NH 3 e de CO 2 no interior do galpão analisado. Contudo, os níveis mensurados foram inferiores àqueles que ofereceriam riscos à saúde das aves e dos trabalhadores, podendo-se concluir que o uso de tela não influenciou negativamente no ambiente aéreo do galpão. PALAVRAS-CHAVE:biosseguridade, ruído, amônia, dióxido de carbono, poedeiras. ENVIRONMENTAL CONDITIONS IN A CONVENTIONAL SCREENED POULTRY SHEDABSTRACT: Avian influenza viruses (H5N1 and H7N2) triggered a great number of studies on biosafety, and one of the discussed solutions is the use of screen to enclose completely the poultry house perimeter, since it can avoid the contact of laying hens with other birds. Thus, the present study aimed to evaluate and compare the use of screen enclosing a conventional laying house perimeter by assessing acoustic and aerial environment inside the facility. The research was performed in a commercial egg production farm located in Southern Minas Gerais State, Brazil. It was carried out in an open facility, in which half area was enclosed by screen and the other half was maintained completely open. Hyline W-36 laying hens were housed. Sound intensity, ammonia concentration (NH 3 ) and carbon dioxide concentration (CO 2 ) were analyzed as variables. These variables were collected from six measuring points in each region (with and without screen), two in each alley (north, central and south). The results indicated that the use of screen did not alter the noise level, NH 3 and CO 2 concentrations inside the analyzed poultry house. However, the levels measured were smaller than to the thresholds that can offer health risks to birds and workers. Therefore, it may be concluded that the use of screen did not influence negatively the facility aerial environment.

show abstract

Influence of different systems of minimum ventilation on air quality in broiler houses

Cited by 10 publications

References 8 publications

Model-predicted ammonia emission from two broiler houses with different rearing systems

Model-predicted ammonia emission from two broiler houses with different rearing systems

Ambiente acústico e aéreo em galpão comercial para poedeiras Dekalb Brown cercados por tela PEAD

Condições ambientais em galpão convencional telado para galinhas poedeiras hyline W-36

Contact Info

Product

Resources

About