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Biblioteca(s):  Embrapa Agroindústria de Alimentos.
Data corrente:  30/09/1998
Data da última atualização:  18/10/2007
Autoria:  FURTADO, A. A.; ALBUQUERQUE, R. T.; LEITE, S. G. F.; PECANHA, R. P.
Título:  Evaluation of hybrid fluidized bed - air lift biological filter for the treatment of ammoniacal effluents.
Ano de publicação:  1997
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.
Idioma:  Inglês
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.
Palavras-Chave:  Air-lift reactor; Carvao ativado; Reator air-lift.
Thesagro:  Nitrificação.
Thesaurus Nal:  activated carbon; nitrification.
Categoria do assunto:  --
Marc:  Mostrar Marc Completo
Registro original:  Embrapa Agroindústria de Alimentos (CTAA)
Biblioteca ID Origem Tipo/Formato Classificação Cutter Registro Volume Status URL
CTAA877 - 1UPCPL - --CTAA-00961998.00046
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Registro Completo

Biblioteca(s):  Embrapa Caprinos e Ovinos.
Data corrente:  21/10/2011
Data da última atualização:  23/09/2019
Tipo da produção científica:  Artigo em Periódico Indexado
Circulação/Nível:  A - 1
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.
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.
Título:  Management practices to control gastrointestinal parasites in dairy and beef goats in Minas Gerais; Brazil.
Ano de publicação:  2011
Fonte/Imprenta:  Veterinary Parasitology, v. 76, n. 2/3, p. 265-269, Mar. 2011.
DOI:  10.1016/j.vetpar.2010.10.049
Idioma:  Inglês
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% op... Mostrar Tudo
Palavras-Chave:  Gastrointestinal diseases; Nematódeo gastrintestinal.
Thesagro:  Anti-helmíntico; Caprino; Doença animal; Epidemiologia; Helminto gastrintestinal; Nematóide; Parasito de animal; Verminose.
Thesaurus NAL:  Animal diseases; Anthelmintics; Disease control; Endoparasites; Epidemiology; Goats; Helminthiasis.
Categoria do assunto:  H Saúde e Patologia
Marc:  Mostrar Marc Completo
Registro original:  Embrapa Caprinos e Ovinos (CNPC)
Biblioteca ID Origem Tipo/Formato Classificação Cutter Registro Volume Status
CNPC24758 - 1UPCAP - DD
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