Colour removal of dyes from synthetic and real textile wastewaters in one- and two-stage anaerobic systems.
Bioresour Technol
; 101(20): 7773-9, 2010 Oct.
Article
em En
| MEDLINE
| ID: mdl-20542688
Decolourisation of the azo dye model compound, Congo Red (CR), and real textile wastewater, was assessed in one- and two-stage anaerobic treatment systems (R1 and R2, respectively). High colour removals were achieved in both treatment systems even when a very high CR concentration (1.2 mM) was applied. However, R2 presented a slightly better stability, in which the acidogenic reactor (R(2,A)) played a major role on dye reduction, as compared to the methanogenic reactor (R(2,M)), evidencing the role of fermentative microorganisms. The minimum electron donor concentration required to sustain dye reduction was much higher than the stoichiometric amount. Additionally, a decrease on the hydraulic retention time (from 24 to 12 h) did not significantly affect decolourisation, indicating that electron transfer was not a concern. Finally, experiments with real textile wastewater showed low decolourisation efficiencies in both systems, most likely due to the presence of dyes not susceptible to reductive decolourisation under these experimental conditions.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Indústria Têxtil
/
Cor
/
Corantes
/
Águas Residuárias
/
Anaerobiose
Idioma:
En
Revista:
Bioresour Technol
Assunto da revista:
ENGENHARIA BIOMEDICA
Ano de publicação:
2010
Tipo de documento:
Article
País de afiliação:
Brasil
País de publicação:
Reino Unido