Data/hora: 01/06/2024 09:49:27

Biblioteca(s): | Embrapa Suínos e Aves.
Data corrente: | 04/12/2014
Data da última atualização: | 05/12/2014
Autoria: | SILVA, M. L. B. da; CANTAO, M. E.; MEZZARI, M. P.; MA, J.; NOSSA, C. W.
Afiliação: | MARCIO LUIS BUSI DA SILVA, CNPSA; MAURICIO EGIDIO CANTAO, CNPSA; MELISSA PAOLA MEZZARI, UNOESC; JIE MA, China University of Petroleum. College of Chemical Engineering. Laboratory of Heavy Oil Processing.; CARLOS WOLFGANG NOSSA, Rice University. Departament of Ecology and Evolutionary.
Título: | Assessment of Bacterial and Archaeal Community Structure in Swine Wastewater Treatment Processes.
Ano de publicação: | 2014
Fonte/Imprenta: | Microbial Ecology, Netherlands, v. 86, p. 106-112, 2014.
Idioma: | Inglês
Conteúdo: | Microbial communities from two field-scale swine wastewater treatment plants (WWTPs) were assessed by pyrosequencing analyses of bacterial and archaeal 16S ribosomal DNA (rDNA) fragments. Effluent samples from secondary (anaerobic covered lagoons and upflow anaerobic sludge blanket [UASB]) and tertiary treatment systems (open-pond natural attenuation lagoon and air-sparged nitrification-denitrification tank followed by alkaline phosphorus precipitation process) were analyzed. A total of 56,807 and 48,859 highquality reads were obtained from bacterial and archaeal libraries, respectively. Dominant bacterial communities were associated with the phylum Firmicutes, Bacteroidetes, Proteobacteria, or Actinobacteria. Bacteria and archaea diversity were highest in UASB effluent sample. Escherichia, Lactobacillus, Bacteroides, and/or Prevotella were used as indicators of putative pathogen reduction throughout the WWTPs. Satisfactory pathogen reduction was observed after the open-pond natural attenuation lagoon but not after the airsparged nitrification/denitrification followed by alkaline phosphorus precipitation treatment processes. Among the archaeal communities, 80 % of the reads was related to hydrogenotrophic methanogens Methanospirillum. Enrichment of hydrogenotrophic methanogens detected in effluent samples from the anaerobic covered lagoons and UASB suggested that CO2 reduction with H2 was the dominant methanogenic pathway in these systems. Overall, the results served to improve our current understanding of major microbial communities? changes downgradient from the pen and throughout swine WWTP as a result of different treatment processes.
Palavras-Chave: | Animal waste management; Tratamento de efluentes.
Thesagro: | Bacteriologia; Dejeto; Suíno; Tratamento da água.
Thesaurus Nal: | Bacteriology; Swine; Wastewater treatment.
Categoria do assunto: | --
Registro original: | Embrapa Suínos e Aves (CNPSA)
Exemplares: | CNPSA - (19854-1) - UPC - AP - DD -  -  -  - DIS