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Registro Completo |
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Biblioteca(s): |
Embrapa Agroindústria de Alimentos. |
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Data corrente: |
30/09/1998 |
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Data da última atualização: |
18/10/2007 |
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Autoria: |
FURTADO, A. A.; ALBUQUERQUE, R. T.; LEITE, S. G. F.; PECANHA, R. P. |
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Título: |
Evaluation of hybrid fluidized bed - air lift biological filter for the treatment of ammoniacal effluents. |
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Ano de publicação: |
1997 |
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Fonte/Imprenta: |
In: INTERNATIONAL CONFERENCE ON MICROORGANISMS IN ACTIVATED SLUDGE AND BIOFILM PROCESSES, 2., 1997, Berkeley. [S.l.: s.n., s.d.] Proceedings. p.461-464. |
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Idioma: |
Inglês |
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Conteúdo: |
Biological filters make use of relatively thin layers of microorganisms adhered to a suitable support, over which the effluent streasm along. It is particularly indicated for no-flocculating microorganisms, like nitrifying bacteria, easily entrained from processes using suspendede cells. The purpose of this work was to evaluate preliminary a hybrid fluidized bed - air lift system, in treating a petroleum refinery effluent, originally containing about 30 mg/L of residual ammoniacal-N. two types of supporting materials were tested: activated carbon particles and polystyrene beads, both with mean size 2mm. The reactor had a colume of 5L and was provided with an internal draft tube. The associated mean residence time was 10h. The process performance was evaluated by measurint the concentrations of ammoniacal-N, nitrite-N and DO, in accordance with procedures recommended by the standard methods. The biolfilm development was monitores via culture isolation on solid medium and photography under electronic and/or optical microscope. Activated carbon particles have shown the best results, leading to a removal of ammonia to an extent around 85%. The best performance of activated carbon as compared to polystyrene, was clearly related to an stronger attachment and homogeneity of the biofilm covering the relatively rougher surface of the coal particles. |
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Palavras-Chave: |
Air-lift reactor; Carvao ativado; Reator air-lift. |
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Thesagro: |
Nitrificação. |
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Thesaurus Nal: |
activated carbon; nitrification. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02134naa a2200229 a 4500
001 1410333
005 2007-10-18
008 1997 bl uuuu u00u1 u #d
100 1 $aFURTADO, A. A.
245 $aEvaluation of hybrid fluidized bed - air lift biological filter for the treatment of ammoniacal effluents.
260 $c1997
520 $aBiological filters make use of relatively thin layers of microorganisms adhered to a suitable support, over which the effluent streasm along. It is particularly indicated for no-flocculating microorganisms, like nitrifying bacteria, easily entrained from processes using suspendede cells. The purpose of this work was to evaluate preliminary a hybrid fluidized bed - air lift system, in treating a petroleum refinery effluent, originally containing about 30 mg/L of residual ammoniacal-N. two types of supporting materials were tested: activated carbon particles and polystyrene beads, both with mean size 2mm. The reactor had a colume of 5L and was provided with an internal draft tube. The associated mean residence time was 10h. The process performance was evaluated by measurint the concentrations of ammoniacal-N, nitrite-N and DO, in accordance with procedures recommended by the standard methods. The biolfilm development was monitores via culture isolation on solid medium and photography under electronic and/or optical microscope. Activated carbon particles have shown the best results, leading to a removal of ammonia to an extent around 85%. The best performance of activated carbon as compared to polystyrene, was clearly related to an stronger attachment and homogeneity of the biofilm covering the relatively rougher surface of the coal particles.
650 $aactivated carbon
650 $anitrification
650 $aNitrificação
653 $aAir-lift reactor
653 $aCarvao ativado
653 $aReator air-lift
700 1 $aALBUQUERQUE, R. T.
700 1 $aLEITE, S. G. F.
700 1 $aPECANHA, R. P.
773 $tIn: INTERNATIONAL CONFERENCE ON MICROORGANISMS IN ACTIVATED SLUDGE AND BIOFILM PROCESSES, 2., 1997, Berkeley. [S.l.: s.n., s.d.] Proceedings. p.461-464.
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Registro original: |
Embrapa Agroindústria de Alimentos (CTAA) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Caprinos e Ovinos. Para informações adicionais entre em contato com cnpc.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
21/10/2011 |
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Data da última atualização: |
23/09/2019 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
GUIMARÃES, A. de S.; GOUVEIA, A. M. G.; CARMO, F. B. do; GOUVEIA, G. C.; SILVA, M. X.; VIEIRA, L. da S.; MOLENTO, M. B. |
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Afiliação: |
Alessandro de Sá Guimarães, Universidade Federal de Minas Gerais - UFMG - Belo Horizonte, MG, Brazil; Aurora Maria Guimarães Gouveia, UFMG; Filipe Borges do Carmo, UFMG; Gabriela Canabrava Gouveia, UFMG; Marcos Xavier Silva, UFMG; LUIZ DA SILVA VIEIRA, CNPC; Marcelo Beltrão Molento, Universidade Federal do Paraná - UFPR - Curitiba, PR, BraziL. |
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Título: |
Management practices to control gastrointestinal parasites in dairy and beef goats in Minas Gerais; Brazil. |
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Ano de publicação: |
2011 |
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Fonte/Imprenta: |
Veterinary Parasitology, v. 76, n. 2/3, p. 265-269, Mar. 2011. |
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DOI: |
10.1016/j.vetpar.2010.10.049 |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: Parasitic infection is recognized worldwide as a limiting factor in the production of goats, and various control methods are used to reduce economic losses, often without considering the epidemiology of the parasites. This has led to the development of highly tolerant parasite populations and the presence of chemical residues in the beef and milk. The objective of this study was to determine the level of knowledge of goat farmers about parasitic diseases and to correlate this with the epidemiology of endoparasites and parasite control practices in goat farms in the state of Minas Gerais, Brazil. The analysis was based on a questionnaire applied by trained veterinarians. The sample was homogeneous throughout the state, covering 18.4% (157/853) of municipalities. Eighty-four dairy goat farms in 81 municipalities and 200 properties with beef goats in 76 municipalities were evaluated. The herd size per goat farm ranged from 4 to 57 (average 24) for beef herds and from 2 to 308 (average 63) for dairy farms. The majority of the beef herd production was extensive and semi-extensive (98.5%), while the dairy herds were maintained under intensive farming (98.8%). The mixed production of goats and sheep was reported by 36.5% of beef goat farmers and by 20.2% of dairy goat farmers. Among the beef goats farms on which the technological level was determined, 2.0% were categorized as having high technological level, 34.5% as medium, and 63.5% as low. Of the 84 dairy farms, 30% operated at a high, 47% at a medium, and 23% at a low technological level. The adoption of practices to reduce parasitism, such as the quarantine of animals, treatment of newly arrived animals, regular cleaning of the floor, and technical assistance, was significantly higher on dairy farms than on beef farms. Although 85.7% of dairy farmers and 83% of beef farmers medicate their animals, the treatments were performed without technical criteria, and deworming intervals ranged from 30 to 120 days or more. The average interval between treatments was significantly longer in dairy goat herds (4.8 months) than in the beef herds (3.6 months). The most commonly used drugs were macrocyclic lactones (37.7% in dairy and 39.5% in beef herds) and benzimidazoles (48.9% in dairy and 31.5% in beef herds). Goat production in Minas Gerais is still in its infancy, and even though using a control program associated with other health practices, producers still rely heavily on chemicals to get satisfactory results. MenosAbstract: Parasitic infection is recognized worldwide as a limiting factor in the production of goats, and various control methods are used to reduce economic losses, often without considering the epidemiology of the parasites. This has led to the development of highly tolerant parasite populations and the presence of chemical residues in the beef and milk. The objective of this study was to determine the level of knowledge of goat farmers about parasitic diseases and to correlate this with the epidemiology of endoparasites and parasite control practices in goat farms in the state of Minas Gerais, Brazil. The analysis was based on a questionnaire applied by trained veterinarians. The sample was homogeneous throughout the state, covering 18.4% (157/853) of municipalities. Eighty-four dairy goat farms in 81 municipalities and 200 properties with beef goats in 76 municipalities were evaluated. The herd size per goat farm ranged from 4 to 57 (average 24) for beef herds and from 2 to 308 (average 63) for dairy farms. The majority of the beef herd production was extensive and semi-extensive (98.5%), while the dairy herds were maintained under intensive farming (98.8%). The mixed production of goats and sheep was reported by 36.5% of beef goat farmers and by 20.2% of dairy goat farmers. Among the beef goats farms on which the technological level was determined, 2.0% were categorized as having high technological level, 34.5% as medium, and 63.5% as low. Of the 84 dairy farms, 30% op... Mostrar Tudo |
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Palavras-Chave: |
Gastrointestinal diseases; Nematódeo gastrintestinal. |
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Thesagro: |
Anti-helmíntico; Caprino; Doença animal; Epidemiologia; Helminto gastrintestinal; Nematóide; Parasito de animal; Verminose. |
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Thesaurus NAL: |
Animal diseases; Anthelmintics; Disease control; Endoparasites; Epidemiology; Goats; Helminthiasis. |
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Categoria do assunto: |
H Saúde e Patologia |
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Marc: |
LEADER 03705naa a2200409 a 4500
001 1903781
005 2019-09-23
008 2011 bl uuuu u00u1 u #d
024 7 $a10.1016/j.vetpar.2010.10.049$2DOI
100 1 $aGUIMARÃES, A. de S.
245 $aManagement practices to control gastrointestinal parasites in dairy and beef goats in Minas Gerais; Brazil.$h[electronic resource]
260 $c2011
520 $aAbstract: Parasitic infection is recognized worldwide as a limiting factor in the production of goats, and various control methods are used to reduce economic losses, often without considering the epidemiology of the parasites. This has led to the development of highly tolerant parasite populations and the presence of chemical residues in the beef and milk. The objective of this study was to determine the level of knowledge of goat farmers about parasitic diseases and to correlate this with the epidemiology of endoparasites and parasite control practices in goat farms in the state of Minas Gerais, Brazil. The analysis was based on a questionnaire applied by trained veterinarians. The sample was homogeneous throughout the state, covering 18.4% (157/853) of municipalities. Eighty-four dairy goat farms in 81 municipalities and 200 properties with beef goats in 76 municipalities were evaluated. The herd size per goat farm ranged from 4 to 57 (average 24) for beef herds and from 2 to 308 (average 63) for dairy farms. The majority of the beef herd production was extensive and semi-extensive (98.5%), while the dairy herds were maintained under intensive farming (98.8%). The mixed production of goats and sheep was reported by 36.5% of beef goat farmers and by 20.2% of dairy goat farmers. Among the beef goats farms on which the technological level was determined, 2.0% were categorized as having high technological level, 34.5% as medium, and 63.5% as low. Of the 84 dairy farms, 30% operated at a high, 47% at a medium, and 23% at a low technological level. The adoption of practices to reduce parasitism, such as the quarantine of animals, treatment of newly arrived animals, regular cleaning of the floor, and technical assistance, was significantly higher on dairy farms than on beef farms. Although 85.7% of dairy farmers and 83% of beef farmers medicate their animals, the treatments were performed without technical criteria, and deworming intervals ranged from 30 to 120 days or more. The average interval between treatments was significantly longer in dairy goat herds (4.8 months) than in the beef herds (3.6 months). The most commonly used drugs were macrocyclic lactones (37.7% in dairy and 39.5% in beef herds) and benzimidazoles (48.9% in dairy and 31.5% in beef herds). Goat production in Minas Gerais is still in its infancy, and even though using a control program associated with other health practices, producers still rely heavily on chemicals to get satisfactory results.
650 $aAnimal diseases
650 $aAnthelmintics
650 $aDisease control
650 $aEndoparasites
650 $aEpidemiology
650 $aGoats
650 $aHelminthiasis
650 $aAnti-helmíntico
650 $aCaprino
650 $aDoença animal
650 $aEpidemiologia
650 $aHelminto gastrintestinal
650 $aNematóide
650 $aParasito de animal
650 $aVerminose
653 $aGastrointestinal diseases
653 $aNematódeo gastrintestinal
700 1 $aGOUVEIA, A. M. G.
700 1 $aCARMO, F. B. do
700 1 $aGOUVEIA, G. C.
700 1 $aSILVA, M. X.
700 1 $aVIEIRA, L. da S.
700 1 $aMOLENTO, M. B.
773 $tVeterinary Parasitology$gv. 76, n. 2/3, p. 265-269, Mar. 2011.
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