Estudo do processo para a aceleração da geração de amônia a partir de resíduos avícolas visando à produção de hidrogênio

Egute, Nayara dos Santos

doi:10.11606/d.85.2010.tde-12082011-155529

Cited by 6 publications

(12 citation statements)

References 20 publications

(39 reference statements)

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“…O nitrogênio é um fator importante no processo de volatilização de amônia, já que age como substrato para a produção desse gás. Alguns estudos demonstram que, sempre que houver maiores níveis de nitrogênio disponíveis, haverá maior teor de volatilização de amônia (Egute et al, 2010). Diferentemente dos resultados encontrados neste estudo, Machacek et al (2010) verificaram maior utilização metabólica de nitrogênio em poedeiras recebendo dieta com inclusão de 2% de zeólitas, porém os autores utilizaram dose quatro vezes superior ao presente trabalho.…”

Section: Resultsunclassified

Zeólitas naturais na dieta de frangos de corte

Schneider

Yuri

Almeida

et al. 2017

Arq. Bras. Med. Vet. Zootec.

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RESUMOO objetivo deste trabalho foi avaliar o efeito da inclusão de 0,5% da zeólita natural clinoptilolita na dieta de frangos de corte sobre o consumo de água, ração e características das excretas. Foi conduzido um ensaio em gaiolas metabólicas, com frangos de corte de linhagem comercial, no período de 14 a 23 dias de idade. O experimento foi constituído de dois grupos de aves, sendo que um recebeu dieta sem inclusão de zeólitas (controle) e outro dieta com inclusão de 0,5% de zeólita (clinoptilolita) em rações isonutritivas, em um delineamento inteiramente ao acaso, com 10 repetições de 10 aves. Avaliou-se o consumo de água e de ração, nas excretas, pH, teor de nitrogênio total e umidade. A inclusão de 0,5% de zeólitas naturais na dieta não alterou (P>0,05) o consumo de água e de ração e o teor de nitrogênio das excretas, entretanto, reduziu (P<0,05) o pH e a umidade das excretas. Conclui-se que a inclusão de 0,5% de zeólitas naturais na dieta de frangos de corte reduz o pH e a umidade das excretas e pode ser utilizada como aditivo alimentar sem prejudicar o consumo de água e de ração.Palavras-chave: amônia, clinoptilolita, pH de excretas, umidade das excretas ABSTRACT The aim of this study was to evaluate the addition of 0.5% natural zeolites (clinoptilolite) to the diet of broilers and their effect on water and feed intake and excreta characteristics. The test was carried out in

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Section: Resultsunclassified

Zeólitas naturais na dieta de frangos de corte

Schneider

Yuri

Almeida

et al. 2017

Arq. Bras. Med. Vet. Zootec.

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“…It is possible to verify, in poultry excrement, a larger and darker lower plate (feces), and a smaller white upper plate, which is uric acid. Thus, bird excreta is composed of feces and "urine," and therefore, they is richer in nitrogen when compared to swine and/or cattle feces [45].…”

Section: Steps Involved In the Transformation Of Nitrogen To Ammoniamentioning

confidence: 99%

“…According to [49], for the prediction of the equilibrium ammonia gas concentration over manure slurries and litter, [50] determined a disassociation constant of ammoniacal-N, and [51] developed Henry's Law constant. Henry's constant (Kh) describes the equilibrium between free ammonia in the aqueous and gas phase [45]. According to [52], this constant characterizes the ratio between a population of molecules of a given compound in two phases, determining the relative compatibility of the compound for each medium to the equilibrium between the vapor and solution phase.…”

Section: Steps Involved In the Transformation Of Nitrogen To Ammoniamentioning

confidence: 99%

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Nitrogen transformation stages into ammonia in broiler production: sources, deposition, transformation and emission to environment

Vilela¹,

Gates²,

Souza³

et al. 2020

DYNA

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Air quality is a major factor in intensive livestock management because air is the main vehicle for the dissemination of physical, chemical, and biological agents that affect the health and welfare of animals and humans. Ammonia is the main gaseous pollutant generated in poultry production. In this study, a literature review was conducted to highlight each nitrogen transformation stage during poultry production, while explaining the conversion mechanisms from the ingestion of crude protein to nitrogen volatilization into the atmosphere as ammonia gas. In summary, the steps for the synthesis of uric acid and the excretion of poultry, mineralization of nitrogen present in excreta, and volatilization of ammonia from litter are presented. Based on this review, the importance of understanding the sources and processes involved in ammonia generation and emission in poultry production is clear, thereby allowing the adoption of assertive measures that could minimize negative effects caused by ammonia emission.

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“…Signs of lesions from ammonia intoxication vary according to the age of the bird, the degree of exposure, and the concentration of the gas. Prolonged exposure to high concentrations of ammonia, such as 50 to 100 ppm, decreases production due to the incidence of increased lacrimal secretion, catarrhal tracheitis, keratoconjunctivitis, and photophobia, which may result in more serious problems such as blindness (Egute et al 2010).…”

Section: Equation 1 Equationmentioning

confidence: 99%

Gas emission in the poultry production

Sousa

Tinôco

Silva

et al. 2017

JABB

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Among the greenhouse gases produced in broiler chicken production environments, ammonia stands out for being present in higher concentrations and for significantly affecting human and animal health. Thus, this review evaluates the various sources of ammonia generation in animal production facilities, the damages caused by ammonia emissions in broiler chicken production facilities, and the accompanying economic losses. The main source of ammonia in broiler production is the nitrogen ingested in the diet, which is broken down into uric acid and, eventually, into ammonia that is volatilized from the bed to the environment. High ammonia concentrations in such facilities can affect productivity and result in economic losses. The effects on the environment are eutrophication of water bodies and ground water contamination. Ammonia emission control in poultry production facilities is therefore inevitable to avoid economic losses, prevent environmental damage, and increase feed efficiency.

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Estudo do processo para a aceleração da geração de amônia a partir de resíduos avícolas visando à produção de hidrogênio

Cited by 6 publications

References 20 publications

Zeólitas naturais na dieta de frangos de corte

Zeólitas naturais na dieta de frangos de corte

Nitrogen transformation stages into ammonia in broiler production: sources, deposition, transformation and emission to environment

Gas emission in the poultry production

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