Bioflocculation of microalgae and bacteria combined with flue gas to improve sewage treatment.
N Biotechnol
; 29(1): 23-31, 2011 Dec 15.
Article
em En
| MEDLINE
| ID: mdl-21565287
ABSTRACT
Although microalgae are promising for a cradle-to-cradle design approach of sewage treatment, their application is hampered by high harvesting costs and low CN ratios of sewage. Therefore, the potential of microalgal bacterial flocs (MaB-flocs) was investigated for the secondary treatment of sewage supplemented with different flue gas flow rates (FGFRs) from a coal power plant. Effluent (N, P, turbidity and pH) and off gas discharge levels (NO(x), SO(x)) met the European discharge limits with a hydraulic retention time of only 0.67 days and an FGFR of 0.6Lh(-1) (0.0025 vvm). This FGFR provided sufficient carbon and resulted in removal efficiencies of 48 ± 7% CO(2), 87 ± 5% NO(x) and 99 ± 1% SO(2). MaB-flocs settled fast reaching up to a density of 19 g VSSL(-1). High biomass productivities (0.18 gL(-1)day(-1)) were obtained under a low light intensity. This successful reactor performance indicates the large potential for the industrial application of MaB-flocs for flue gas sparged sewage treatment.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Esgotos
/
Eliminação de Resíduos Líquidos
/
Reatores Biológicos
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Microalgas
/
Gases
Idioma:
En
Ano de publicação:
2011
Tipo de documento:
Article