Physicochemical and ecological characteristics of the granular sludge during start-up of Anammox reactor / 生物工程学报
Chinese Journal of Biotechnology
;
(12): 1854-1864, 2014.
Artigo
em Chinês
| WPRIM
| ID: wpr-345536
ABSTRACT
The anaerobic granular sludge from an Internal Circulation (IC) reactor of a paper mill wastewater treatment plant were seeded in an Anammox upflow anaerobic sludge blanket reactor. After 185 days operation, the reactor was finally started up by increasing the influent ammonium and nitrite concentrations to 224 mg/L and 255 mg/L, respectively, with volumetric nitrogen removal rate increasing to 3.76 kg/(m3·d). The physicochemical characteristics of the cultivated Anammox granules were observed by scanning electron microscope, transmission electron microscope and Fourier Transform infrared spectroscopy (FTIR). Results suggested that during the start-up course, the granular sludge initially disintegrated and then re-aggregated. FTIR spectra results revealed that the Anammox granular sludge contained abundant functional groups, indicating that it may also possess good adsorption properties. The ecological structure of the granular sludge, analyzed by the metagenomic sequencing methods, suggested that the relative abundance of the dominant bacterial community in the seeding sludge, i.e., Proteobacteria, Firmicutes, Bacteroidetes, significantly reduced, while Planctomycetes which contains anaerobic ammonium oxidation bacteria remarkably increased from 1.59% to 23.24% in the Anammox granules.
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Esgotos
/
Bactérias
/
Química
/
Eliminação de Resíduos Líquidos
/
Reatores Biológicos
/
Águas Residuárias
/
Amônia
/
Métodos
/
Microbiologia
/
Nitrogênio
Idioma:
Chinês
Revista:
Chinese Journal of Biotechnology
Ano de publicação:
2014
Tipo de documento:
Artigo
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